Bell 206L-4 Maintenance Manual

BHT-206L4-MM-1

NOTICE

The instructions set forth in this manual, as supplemented or modified by Alert Service Bulletins (ASB) or

other directions issued by Bell Helicopter Textron Inc. and Airworthiness Directives (AD) issued by the

applicable regulatory agencies, shall be strictly followed.

Export Classification C, ECCN EAR99

32672)),&(%2;)257:257+7(;$6

REISSUE — 2 DECEMBER 1994

REVISION 24 — 18 JULY 2019

COPYRIGHT NOTICE

COPYRIGHT

201

BELL

®

HELICOPTER TEXTRON INC.

AND BELL HELICOPTER TEXTRON

CANADA LTD.

MAINTENANCE MANUAL

VOLUME 1

GENERAL INFORMATION

BHT-206L4-MM-1

PN Rev. 23 25 JUN 2019

Additional copies of this publication may be obtained by contacting:

Commercial Publication Distribution Center

Bell Helicopter Textron Inc.

P. O . B o x 4 8 2

Fort Worth, Texas 76101-0482

PROPRIETARY RIGHTS NOTICE

These data are proprietary to Bell Helicopter Textron Inc. Disclosure,

reproduction, or use of these data for any purpose other than helicopter

operation or maintenance is forbidden without prior written authorization from

Bell Helicopter Textron Inc.

Export Classification C, ECCN EAR99

DESTINATION CONTROL STATEMENT

WARNING — This document contains technical data whose export is restricted

by the Arms Export Control Act (Title 22, U.S.C., Sec 2751, et. seq.) or the Export

Administration Act of 1979, as amended, Title 50, U.S.C., App. 2401 et. seq.

Violations of these export laws are subject to severe criminal penalties.

Disseminate in accordance with provisions of DoD Directive 5230.25.

BHT-206L4-MM-1

25 JUN 2019 Rev. 23 Warning

WARNING

THIS MANUAL APPLIES ONLY TO HELICOPTERS AND COMPONENTS

MAINTAINED IN ACCORDANCE WITH BELL HELICOPTER TEXTRON

(BELL) APPROVED PROCEDURES USING BELL APPROVED PARTS.

ALL INSPECTION, REPAIR AND OVERHAUL PROCEDURES PUBLISHED

BY BELL, INCLUDING PART RETIREMENT LIFE, ARE BASED SOLELY ON

THE USE OF BELL PARTS THAT HAVE BEEN MAINTAINED USING BELL

APPROVED DATA. THE DATA PUBLISHED HEREIN OR OTHERWISE

SUPPLIED BY BELL IS NOT APPLICABLE TO NON-BELL PARTS OR

PARTS THAT HAVE BEEN REPAIRED USING DATA AND/OR PROCESSES

NOT APPROVED BY BELL.

BELL IS NOT RESPONSIBLE FOR ANY PART OTHER THAN THOSE THAT

IT HAS APPROVED.

BEFORE PERFORMING ANY PROCEDURE CONTAINED IN THIS MANUAL

YOU MUST INSPECT THE AFFECTED PARTS AND RECORDS FOR

EVIDENCE OF ANY MANUFACTURE, REPAIR, REWORK OR USE OF A

PROCESS NOT APPROVED BY BELL.

IF YOU IDENTIFY OR SUSPECT THE USE OF PARTS NOT AUTHORIZED

BY BELL, EITHER REMOVE THE AFFECTED ITEM FROM THE AIRCRAFT

OR OBTAIN INSTRUCTIONS FOR CONTINUED AIRWORTHINESS FROM

THE MANUFACTURER OR THE ORGANIZATION THAT APPROVED THE

REPAIR.

Export Classification C, ECCN EAR99

BHT-206L4-MM-1

CSS Rev. 23 25 JUN 2019 Export Classification C, ECCN EAR99

CUSTOMER SUPPORT AND SERVICES

Flying smart means that no matter where you are, or what time it is, you can make a call

and get additional information, clarification, or advice on a technical or operational issue

concerning your helicopter or information contained in our Technical Publications.

Product Support Engineering (PSE) is just a phone call away and may be contacted as

follows:

For additional information on Customer Support and Services as well as Product Support

Engineering (PSE) and your local Customer Service Engineering (CSE) network, please

access http://www.bellflight.com/support-and-service/support.

Model 206, 407, or 505

Phone: 450-437-2862 or 800-363-8023 (U.S./Canada)

Fax: 450-433-0272

E-mail: [email protected]

Model 222, 230, 427, 429, or 430

Phone: 450-437-2077 or 800-463-3036 (U.S./Canada)

Fax: 450-433-0272

E-mail: [email protected]

Model 204, 205, 212, or 412

Phone: 450-437-6201 or 800-363-8028 (U.S./Canada)

Fax: 450-433-0272

E-mail: [email protected]

Model 210, HUEY II, and All Bell’s Active and

Surplus

Military Medium Helicopter Models

Phone: 817-280-3548

Fax: 817-280-2635

E-mail: [email protected]

Model OH-58, TH-67, TH-57, Both Active and

Surplus

Military

Phone: 817-280-3548

Fax: 817-280-2635

E-mail: [email protected]

BHT-206L4-MM-1

LOG OF REVISIONS

Insert latest revision pages and dispose of superseded ones.

On a revised page, the text and/or illustration affected by the latest revision is shown by a vertical line. A revised

page with only a vertical line next to the page number indicates that text has shifted or that non-technical

correction(s) were made on that page.

Page No. Rev No.

Page No. Rev No. Page No. Rev No.

LOG OF PAGES

Original . . . . 0 . . . . . . 02 OCT 92

Reissue . . . . 0 . . . . . . 02 DEC 94

Revision. . . . 1 . . . . . . 21 APR 98

Revision. . . . 2 . . . . . . 16 MAY 02

Revision. . . . 3 . . . . . . 09 DEC 02

Revision. . . . 4 . . . . . . 22 DEC 03

Revision. . . . 5 . . . . . . .07 JUL 06

Revision. . . . 6 . . . . . . 30 APR 08

Revision. . . . 7 . . . . . . 26 MAY 09

Revision . . . 8 . . . . . . 25 SEP 09

Revision . . . 9 . . . . . .30 NOV 09

Revision . . . 10 . . . . .23 DEC 09

Revision . . . 11 . . . . .31 AUG 10

Revision . . . 12 . . . . . 27 SEP 10

Revision . . . 13 . . . . . 25 FEB 11

Revision . . . 14 . . . . . 08 APR 11

Revision . . . 15 . . . . . 29 FEB 12

Revision . . . 16 . . . . . 01 JUN 12

Revision . . . 17 . . . . 07 NOV 12

Revision . . . 18 . . . . .07 JUN 13

Revision . . . 19 . . . . .17 FEB 14

Revision . . . 20 . . . . 07 NOV 14

Revision . . . 21 . . . . .08 JAN 15

Revision . . . 22 . . . . 10 MAR 17

Revision . . . 23 . . . . .25 JUN 19

Revision . . . 24 . . . . . 18 JUL 19

Export Classification C, ECCN EAR99

VOLUME 1

Cover . . . . . . . . . . . . . . . . . . . .23

Title . . . . . . . . . . . . . . . . . . . . .24

PN . . . . . . . . . . . . . . . . . . . . . .23

Warning . . . . . . . . . . . . . . . . . .23

CSS . . . . . . . . . . . . . . . . . . . . .23

A – D . . . . . . . . . . . . . . . . . . . .24

E/F . . . . . . . . . . . . . . . . . . . . . .24

Help . . . . . . . . . . . . . . . . . . . . .17

Customer Feedback. . . . . . . . .23

Helicopter Sales Notice . . . . . .23

Warranty. . . . . . . . . . . . . . . . . .23

BR . . . . . . . . . . . . . . . . . . . . . .23

TR . . . . . . . . . . . . . . . . . . . . . .23

i/ii . . . . . . . . . . . . . . . . . . . . . . .23

Chapter 1

1/2 . . . . . . . . . . . . . . . . . . . . . . .0

3 – 6 . . . . . . . . . . . . . . . . . . . . . .0

Chapter 4

1 – 12 . . . . . . . . . . . . . . . . . . . .23

Chapter 5

1 . . . . . . . . . . . . . . . . . . . . . . . .13

2 . . . . . . . . . . . . . . . . . . . . . . . .20

3 – 5 . . . . . . . . . . . . . . . . . . . . .13

6 . . . . . . . . . . . . . . . . . . . . . . . .18

6A/6B . . . . . . . . . . . . . . . . . . . .18

7 . . . . . . . . . . . . . . . . . . . . . . . 13

8 – 9 . . . . . . . . . . . . . . . . . . . . 18

10 . . . . . . . . . . . . . . . . . . . . . . 24

11 – 12 . . . . . . . . . . . . . . . . . . 13

13/14. . . . . . . . . . . . . . . . . . . . 13

15/16. . . . . . . . . . . . . . . . . . . . 13

17 . . . . . . . . . . . . . . . . . . . . . . 13

18 . . . . . . . . . . . . . . . . . . . . . . 20

19 – 23 . . . . . . . . . . . . . . . . . . 13

24 . . . . . . . . . . . . . . . . . . . . . . 18

25/26. . . . . . . . . . . . . . . . . . . . 18

27 . . . . . . . . . . . . . . . . . . . . . . 13

28 . . . . . . . . . . . . . . . . . . . . . . 24

29 . . . . . . . . . . . . . . . . . . . . . . 13

30 . . . . . . . . . . . . . . . . . . . . . . 14

31 – 44 . . . . . . . . . . . . . . . . . . 13

45/46. . . . . . . . . . . . . . . . . . . . 13

47 – 57 . . . . . . . . . . . . . . . . . . 13

58 – 59 . . . . . . . . . . . . . . . . . . 24

60 . . . . . . . . . . . . . . . . . . . . . . 13

61 . . . . . . . . . . . . . . . . . . . . . . 14

62 – 73 . . . . . . . . . . . . . . . . . . 13

74 . . . . . . . . . . . . . . . . . . . . . . 20

75/76. . . . . . . . . . . . . . . . . . . . 13

77 – 80 . . . . . . . . . . . . . . . . . . 13

81/82. . . . . . . . . . . . . . . . . . . . 13

83 . . . . . . . . . . . . . . . . . . . . . . 20

84 – 90 . . . . . . . . . . . . . . . . . . 13

91/92. . . . . . . . . . . . . . . . . . . . 13

93 – 95 . . . . . . . . . . . . . . . . . . 13

96 . . . . . . . . . . . . . . . . . . . . . . 20

97/98 . . . . . . . . . . . . . . . . . . . . 13

99/100 . . . . . . . . . . . . . . . . . . . 13

101 – 102 . . . . . . . . . . . . . . . . 13

103/104 . . . . . . . . . . . . . . . . . . 20

105/106 . . . . . . . . . . . . . . . . . . 16

107 . . . . . . . . . . . . . . . . . . . . . 13

108 – 110 . . . . . . . . . . . . . . . . 20

111/112 . . . . . . . . . . . . . . . . . . 18

113/114 . . . . . . . . . . . . . . . . . . 20

115/116 . . . . . . . . . . . . . . . . . . 13

117/118 . . . . . . . . . . . . . . . . . . 13

119 – 120 . . . . . . . . . . . . . . . . 16

121 – 124 . . . . . . . . . . . . . . . . 13

125/126 . . . . . . . . . . . . . . . . . . 13

127 – 128 . . . . . . . . . . . . . . . . 13

129/130 . . . . . . . . . . . . . . . . . . 13

131/132 . . . . . . . . . . . . . . . . . . 22

133/134 . . . . . . . . . . . . . . . . . . 20

135 . . . . . . . . . . . . . . . . . . . . . 22

136 – 138 . . . . . . . . . . . . . . . . 13

139/140 . . . . . . . . . . . . . . . . . . 13

141 – 142 . . . . . . . . . . . . . . . . 13

143 – 146 . . . . . . . . . . . . . . . . 18

147 . . . . . . . . . . . . . . . . . . . . . 13

148 – 149 . . . . . . . . . . . . . . . . 18

150 . . . . . . . . . . . . . . . . . . . . . 16

151/152 . . . . . . . . . . . . . . . . . . 13

153 – 154 . . . . . . . . . . . . . . . . 13

155/156 . . . . . . . . . . . . . . . . . . 13

157 . . . . . . . . . . . . . . . . . . . . . 18

158 . . . . . . . . . . . . . . . . . . . . . 13

18 JUL 2019 Rev. 24 A

BHT-206L4-MM-1

LOG OF PAGES (CONT)

Page No. Rev No.

Page No. Rev No. Page No. Rev No.

Export Classification C, ECCN EAR99

159/160. . . . . . . . . . . . . . . . . . 18

161 . . . . . . . . . . . . . . . . . . . . . 13

162 . . . . . . . . . . . . . . . . . . . . . 18

163 . . . . . . . . . . . . . . . . . . . . . 13

164 . . . . . . . . . . . . . . . . . . . . . 18

165/166. . . . . . . . . . . . . . . . . . 13

167 . . . . . . . . . . . . . . . . . . . . . 13

168 . . . . . . . . . . . . . . . . . . . . . 18

169 – 172 . . . . . . . . . . . . . . . . 13

173 . . . . . . . . . . . . . . . . . . . . . 18

174 . . . . . . . . . . . . . . . . . . . . . 13

175 – 180 . . . . . . . . . . . . . . . . 18

181/182. . . . . . . . . . . . . . . . . . 13

183 . . . . . . . . . . . . . . . . . . . . . 18

184 . . . . . . . . . . . . . . . . . . . . . 22

VOLUME 2

Cover . . . . . . . . . . . . . . . . . . . 24

Title. . . . . . . . . . . . . . . . . . . . . 24

PN. . . . . . . . . . . . . . . . . . . . . . 24

Chapter 6

1/2. . . . . . . . . . . . . . . . . . . . . . . 0

3 – 6 . . . . . . . . . . . . . . . . . . . . . 0

Chapter 7

1/2. . . . . . . . . . . . . . . . . . . . . . . 0

3 . . . . . . . . . . . . . . . . . . . . . . . 24

4 . . . . . . . . . . . . . . . . . . . . . . . . 0

5/6. . . . . . . . . . . . . . . . . . . . . . . 0

Chapter 8

1/2. . . . . . . . . . . . . . . . . . . . . . 24

3 – 5 . . . . . . . . . . . . . . . . . . . . . 0

6 . . . . . . . . . . . . . . . . . . . . . . . 24

7 – 13 . . . . . . . . . . . . . . . . . . . . 0

14 – 28 . . . . . . . . . . . . . . . . . . 24

Chapter 9

1/2. . . . . . . . . . . . . . . . . . . . . . . 0

3 – 4 . . . . . . . . . . . . . . . . . . . . . 0

Chapter 10

1/2. . . . . . . . . . . . . . . . . . . . . . . 0

3 – 5 . . . . . . . . . . . . . . . . . . . . . 0

6 . . . . . . . . . . . . . . . . . . . . . . . 20

7/8. . . . . . . . . . . . . . . . . . . . . . . 0

Chapter 11

1/2 . . . . . . . . . . . . . . . . . . . . . . 20

3 – 14 . . . . . . . . . . . . . . . . . . . 20

15/16 . . . . . . . . . . . . . . . . . . . . 20

Chapter 12

1 . . . . . . . . . . . . . . . . . . . . . . . 18

2 . . . . . . . . . . . . . . . . . . . . . . . 14

3/4 . . . . . . . . . . . . . . . . . . . . . . . 5

5 . . . . . . . . . . . . . . . . . . . . . . . 18

6 . . . . . . . . . . . . . . . . . . . . . . . . 5

7/8 . . . . . . . . . . . . . . . . . . . . . . . 5

9 – 14 . . . . . . . . . . . . . . . . . . . . 5

15/16 . . . . . . . . . . . . . . . . . . . . 20

17 – 24 . . . . . . . . . . . . . . . . . . . 5

25 . . . . . . . . . . . . . . . . . . . . . . 24

26 . . . . . . . . . . . . . . . . . . . . . . . 5

27 – 28 . . . . . . . . . . . . . . . . . . 24

29/30 . . . . . . . . . . . . . . . . . . . . . 5

31 – 32 . . . . . . . . . . . . . . . . . . 14

32A/32B . . . . . . . . . . . . . . . . . 14

33 – 38 . . . . . . . . . . . . . . . . . . 24

39 . . . . . . . . . . . . . . . . . . . . . . . 5

40 . . . . . . . . . . . . . . . . . . . . . . 24

41 – 42 . . . . . . . . . . . . . . . . . . . 5

43 – 44 . . . . . . . . . . . . . . . . . . 24

Chapter 18

1 – 2 . . . . . . . . . . . . . . . . . . . . 20

3/4 . . . . . . . . . . . . . . . . . . . . . . 20

5 – 10 . . . . . . . . . . . . . . . . . . . 20

11/12 . . . . . . . . . . . . . . . . . . . . 20

13 – 16 . . . . . . . . . . . . . . . . . . 20

17 – 24 . . . . . . . . . . . . . . . . . . 24

25 . . . . . . . . . . . . . . . . . . . . . . 20

26 . . . . . . . . . . . . . . . . . . . . . . 24

27 – 32 . . . . . . . . . . . . . . . . . . 20

33 . . . . . . . . . . . . . . . . . . . . . . 24

34 – 36 . . . . . . . . . . . . . . . . . . 20

37 . . . . . . . . . . . . . . . . . . . . . . 24

38 . . . . . . . . . . . . . . . . . . . . . . 20

39 . . . . . . . . . . . . . . . . . . . . . . 24

40 – 42 . . . . . . . . . . . . . . . . . . 20

43 . . . . . . . . . . . . . . . . . . . . . . 24

44 – 48 . . . . . . . . . . . . . . . . . . 20

49 – 52 . . . . . . . . . . . . . . . . . . 24

53 – 56 . . . . . . . . . . . . . . . . . . 20

57 – 60 . . . . . . . . . . . . . . . . . . 24

61 – 62 . . . . . . . . . . . . . . . . . . 20

63 – 64. . . . . . . . . . . . . . . . . . . 24

65 – 66. . . . . . . . . . . . . . . . . . . 20

67. . . . . . . . . . . . . . . . . . . . . . . 24

68 – 71. . . . . . . . . . . . . . . . . . . 20

72. . . . . . . . . . . . . . . . . . . . . . . 24

73 – 77. . . . . . . . . . . . . . . . . . . 20

78. . . . . . . . . . . . . . . . . . . . . . . 24

79 – 83. . . . . . . . . . . . . . . . . . . 20

84 – 85. . . . . . . . . . . . . . . . . . . 24

86. . . . . . . . . . . . . . . . . . . . . . . 20

87. . . . . . . . . . . . . . . . . . . . . . . 24

88. . . . . . . . . . . . . . . . . . . . . . . 20

VOLUME 3

Cover . . . . . . . . . . . . . . . . . . . . 20

Title . . . . . . . . . . . . . . . . . . . . . 20

PN . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 21

1/2 . . . . . . . . . . . . . . . . . . . . . . 20

3 – 6. . . . . . . . . . . . . . . . . . . . . 20

6A – 6B . . . . . . . . . . . . . . . . . . 20

7 – 10. . . . . . . . . . . . . . . . . . . . . 0

Chapter 25

1 – 42. . . . . . . . . . . . . . . . . . . . . 0

43/44 . . . . . . . . . . . . . . . . . . . . . 0

Chapter 26

1/2 . . . . . . . . . . . . . . . . . . . . . . . 0

3 – 4. . . . . . . . . . . . . . . . . . . . . . 0

VOLUME 4

Cover . . . . . . . . . . . . . . . . . . . . 24

Title . . . . . . . . . . . . . . . . . . . . . 24

PN . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 28

1 – 2. . . . . . . . . . . . . . . . . . . . . 24

3/4 . . . . . . . . . . . . . . . . . . . . . . 24

5. . . . . . . . . . . . . . . . . . . . . . . . 24

6 – 7. . . . . . . . . . . . . . . . . . . . . . 0

8 – 12. . . . . . . . . . . . . . . . . . . . 24

12A/12B. . . . . . . . . . . . . . . . . . 24

13. . . . . . . . . . . . . . . . . . . . . . . . 0

14. . . . . . . . . . . . . . . . . . . . . . . 11

15 – 18. . . . . . . . . . . . . . . . . . . 24

18A – 18B . . . . . . . . . . . . . . . . 24

B Rev. 24 18 JUL 2019

BHT-206L4-MM-1

LOG OF PAGES (CONT)

Page No. Rev No.

Page No. Rev No. Page No. Rev No.

Export Classification C, ECCN EAR99

19 . . . . . . . . . . . . . . . . . . . . . . . .0

20 . . . . . . . . . . . . . . . . . . . . . . .24

21 – 26 . . . . . . . . . . . . . . . . . . . .0

27 . . . . . . . . . . . . . . . . . . . . . . .11

28 – 30 . . . . . . . . . . . . . . . . . . . .0

31 . . . . . . . . . . . . . . . . . . . . . . .11

32 – 33 . . . . . . . . . . . . . . . . . . . .0

34 . . . . . . . . . . . . . . . . . . . . . . .20

34A/34B . . . . . . . . . . . . . . . . . .20

35 . . . . . . . . . . . . . . . . . . . . . . . .0

36 – 39 . . . . . . . . . . . . . . . . . . .24

40 . . . . . . . . . . . . . . . . . . . . . . .20

41 . . . . . . . . . . . . . . . . . . . . . . .11

42 . . . . . . . . . . . . . . . . . . . . . . .24

Chapter 29

1 – 10 . . . . . . . . . . . . . . . . . . . .22

11/12 . . . . . . . . . . . . . . . . . . . .22

13 – 34 . . . . . . . . . . . . . . . . . . .22

VOLUME 5

Cover . . . . . . . . . . . . . . . . . . . .24

Title . . . . . . . . . . . . . . . . . . . . .24

PN . . . . . . . . . . . . . . . . . . . . . .24

Chapter 30

1/2 . . . . . . . . . . . . . . . . . . . . . . .0

3/4 . . . . . . . . . . . . . . . . . . . . . . .0

Chapter 32

1 – 4 . . . . . . . . . . . . . . . . . . . . . .0

5 – 8 . . . . . . . . . . . . . . . . . . . . .11

9 . . . . . . . . . . . . . . . . . . . . . . . .12

10 – 12 . . . . . . . . . . . . . . . . . . . .0

13 . . . . . . . . . . . . . . . . . . . . . . .11

14 . . . . . . . . . . . . . . . . . . . . . . . .0

14A/14B . . . . . . . . . . . . . . . . . .11

15 . . . . . . . . . . . . . . . . . . . . . . . .0

16 . . . . . . . . . . . . . . . . . . . . . . .11

17 . . . . . . . . . . . . . . . . . . . . . . . .0

18 – 19 . . . . . . . . . . . . . . . . . . .11

20 – 26 . . . . . . . . . . . . . . . . . . . .0

27 – 28 . . . . . . . . . . . . . . . . . . .20

28A/28B . . . . . . . . . . . . . . . . . .20

29 – 42 . . . . . . . . . . . . . . . . . . . .0

43 – 47 . . . . . . . . . . . . . . . . . . .11

48 – 50 . . . . . . . . . . . . . . . . . . . .0

51 . . . . . . . . . . . . . . . . . . . . . . .11

52 – 63 . . . . . . . . . . . . . . . . . . . .0

64 . . . . . . . . . . . . . . . . . . . . . . 11

65/66. . . . . . . . . . . . . . . . . . . . . 0

67 – 70 . . . . . . . . . . . . . . . . . . . 0

71/72. . . . . . . . . . . . . . . . . . . . . 0

73 – 74 . . . . . . . . . . . . . . . . . . . 0

Chapter 52

1 – 2 . . . . . . . . . . . . . . . . . . . . 24

3/4. . . . . . . . . . . . . . . . . . . . . . 24

5 – 38 . . . . . . . . . . . . . . . . . . . . 0

39/40. . . . . . . . . . . . . . . . . . . . . 0

41 . . . . . . . . . . . . . . . . . . . . . . 11

42 . . . . . . . . . . . . . . . . . . . . . . . 0

43 – 44 . . . . . . . . . . . . . . . . . . 11

45 – 51 . . . . . . . . . . . . . . . . . . . 0

52 – 60 . . . . . . . . . . . . . . . . . . 24

61/62. . . . . . . . . . . . . . . . . . . . 24

Chapter 53

1 – 2 . . . . . . . . . . . . . . . . . . . . 24

3 – 4 . . . . . . . . . . . . . . . . . . . . . 5

5/6. . . . . . . . . . . . . . . . . . . . . . . 5

7 . . . . . . . . . . . . . . . . . . . . . . . 11

8 – 9 . . . . . . . . . . . . . . . . . . . . . 5

10 – 12 . . . . . . . . . . . . . . . . . . 11

12A . . . . . . . . . . . . . . . . . . . . . 11

12B . . . . . . . . . . . . . . . . . . . . . 20

13 – 14 . . . . . . . . . . . . . . . . . . . 5

15/16. . . . . . . . . . . . . . . . . . . . 11

17 – 18 . . . . . . . . . . . . . . . . . . . 5

19 – 28 . . . . . . . . . . . . . . . . . . 24

VOLUME 6

Cover . . . . . . . . . . . . . . . . . . . 24

Title. . . . . . . . . . . . . . . . . . . . . 24

PN. . . . . . . . . . . . . . . . . . . . . . 24

Chapter 62

1 . . . . . . . . . . . . . . . . . . . . . . . 20

2 . . . . . . . . . . . . . . . . . . . . . . . 24

3/4. . . . . . . . . . . . . . . . . . . . . . 20

5/6. . . . . . . . . . . . . . . . . . . . . . 20

7 – 12 . . . . . . . . . . . . . . . . . . . 20

13 – 14 . . . . . . . . . . . . . . . . . . 24

14A – 14B . . . . . . . . . . . . . . . . 24

15 – 18 . . . . . . . . . . . . . . . . . . 20

19 – 22 . . . . . . . . . . . . . . . . . . 24

22A/22B . . . . . . . . . . . . . . . . . 24

23 – 28 . . . . . . . . . . . . . . . . . . 24

29 – 33 . . . . . . . . . . . . . . . . . . 20

34 . . . . . . . . . . . . . . . . . . . . . . 24

35 – 66 . . . . . . . . . . . . . . . . . . 20

Chapter 63

1 – 4 . . . . . . . . . . . . . . . . . . . . 13

5/6 . . . . . . . . . . . . . . . . . . . . . . 11

7 . . . . . . . . . . . . . . . . . . . . . . . 11

8 – 10 . . . . . . . . . . . . . . . . . . . . 0

10A/10B . . . . . . . . . . . . . . . . . 11

11 – 14 . . . . . . . . . . . . . . . . . . . 0

15 . . . . . . . . . . . . . . . . . . . . . . 11

16 . . . . . . . . . . . . . . . . . . . . . . 24

17 . . . . . . . . . . . . . . . . . . . . . . 11

18 . . . . . . . . . . . . . . . . . . . . . . 20

19 – 20 . . . . . . . . . . . . . . . . . . 11

20A/20B . . . . . . . . . . . . . . . . . 16

21 . . . . . . . . . . . . . . . . . . . . . . . 0

22 . . . . . . . . . . . . . . . . . . . . . . 24

23 – 24 . . . . . . . . . . . . . . . . . . 20

24A/24B . . . . . . . . . . . . . . . . . 20

25 . . . . . . . . . . . . . . . . . . . . . . 24

26 – 27 . . . . . . . . . . . . . . . . . . . 0

28 . . . . . . . . . . . . . . . . . . . . . . 11

29 – 30 . . . . . . . . . . . . . . . . . . 13

30A – 30E . . . . . . . . . . . . . . . . 13

30F . . . . . . . . . . . . . . . . . . . . . 24

30G/30H . . . . . . . . . . . . . . . . . 24

31 . . . . . . . . . . . . . . . . . . . . . . 13

32 – 44 . . . . . . . . . . . . . . . . . . . 0

45 – 48 . . . . . . . . . . . . . . . . . . 11

49 . . . . . . . . . . . . . . . . . . . . . . . 0

50 – 52 . . . . . . . . . . . . . . . . . . 11

53 . . . . . . . . . . . . . . . . . . . . . . . 0

54 – 55 . . . . . . . . . . . . . . . . . . 11

56 . . . . . . . . . . . . . . . . . . . . . . 20

57 – 60 . . . . . . . . . . . . . . . . . . 11

60A – 60B . . . . . . . . . . . . . . . . 11

61 – 63 . . . . . . . . . . . . . . . . . . . 0

64 – 65 . . . . . . . . . . . . . . . . . . 11

66 . . . . . . . . . . . . . . . . . . . . . . . 0

67 – 70 . . . . . . . . . . . . . . . . . . 11

70A/70B . . . . . . . . . . . . . . . . . 11

71 – 72 . . . . . . . . . . . . . . . . . . . 0

73/74 . . . . . . . . . . . . . . . . . . . . . 0

18 JUL 2019 Rev. 24 C

BHT-206L4-MM-1

LOG OF PAGES (CONT)

Page No. Rev No.

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Export Classification C, ECCN EAR99

VOLUME 7

Cover . . . . . . . . . . . . . . . . . . . 24

Title. . . . . . . . . . . . . . . . . . . . . 24

PN. . . . . . . . . . . . . . . . . . . . . . 24

Chapter 64

1 – 4 . . . . . . . . . . . . . . . . . . . . 20

5 . . . . . . . . . . . . . . . . . . . . . . . 24

6 – 26 . . . . . . . . . . . . . . . . . . . 20

Chapter 65

1 . . . . . . . . . . . . . . . . . . . . . . . 11

2 . . . . . . . . . . . . . . . . . . . . . . . 22

3/4. . . . . . . . . . . . . . . . . . . . . . 11

5 – 10 . . . . . . . . . . . . . . . . . . . . 0

11/12. . . . . . . . . . . . . . . . . . . . . 0

13 – 15 . . . . . . . . . . . . . . . . . . . 0

16 . . . . . . . . . . . . . . . . . . . . . . 11

17 – 18 . . . . . . . . . . . . . . . . . . 24

19 . . . . . . . . . . . . . . . . . . . . . . 11

20 . . . . . . . . . . . . . . . . . . . . . . 22

21 . . . . . . . . . . . . . . . . . . . . . . . 0

22 . . . . . . . . . . . . . . . . . . . . . . 11

23 – 24 . . . . . . . . . . . . . . . . . . 22

25 – 28 . . . . . . . . . . . . . . . . . . 11

29 . . . . . . . . . . . . . . . . . . . . . . 22

30 . . . . . . . . . . . . . . . . . . . . . . 14

31 – 32 . . . . . . . . . . . . . . . . . . 22

33/34. . . . . . . . . . . . . . . . . . . . 22

35 – 36 . . . . . . . . . . . . . . . . . . 11

37 . . . . . . . . . . . . . . . . . . . . . . 22

38 . . . . . . . . . . . . . . . . . . . . . . 11

39 – 42 . . . . . . . . . . . . . . . . . . 22

43 – 46 . . . . . . . . . . . . . . . . . . 11

47 – 48 . . . . . . . . . . . . . . . . . . 22

49/50. . . . . . . . . . . . . . . . . . . . 22

VOLUME 8

Cover . . . . . . . . . . . . . . . . . . . 24

Title. . . . . . . . . . . . . . . . . . . . . 24

PN. . . . . . . . . . . . . . . . . . . . . . 24

Chapter 67

1 . . . . . . . . . . . . . . . . . . . . . . . 24

2 – 3 . . . . . . . . . . . . . . . . . . . . 11

4 . . . . . . . . . . . . . . . . . . . . . . . 24

5/6. . . . . . . . . . . . . . . . . . . . . . 24

7 – 10 . . . . . . . . . . . . . . . . . . . . 0

11/12 . . . . . . . . . . . . . . . . . . . . . 0

13 – 16 . . . . . . . . . . . . . . . . . . . 0

17 . . . . . . . . . . . . . . . . . . . . . . 24

18 . . . . . . . . . . . . . . . . . . . . . . . 0

19/20 . . . . . . . . . . . . . . . . . . . . 24

21 – 28 . . . . . . . . . . . . . . . . . . . 0

29 – 30 . . . . . . . . . . . . . . . . . . 24

30A – 30B . . . . . . . . . . . . . . . . 24

30C/30D . . . . . . . . . . . . . . . . . 24

31 – 32 . . . . . . . . . . . . . . . . . . 24

33 . . . . . . . . . . . . . . . . . . . . . . 10

34 . . . . . . . . . . . . . . . . . . . . . . . 0

35 – 36 . . . . . . . . . . . . . . . . . . 24

36A/36B . . . . . . . . . . . . . . . . . 24

37 – 39 . . . . . . . . . . . . . . . . . . . 0

40 . . . . . . . . . . . . . . . . . . . . . . 24

41 – 43 . . . . . . . . . . . . . . . . . . 11

44 . . . . . . . . . . . . . . . . . . . . . . 24

45 . . . . . . . . . . . . . . . . . . . . . . 11

46 . . . . . . . . . . . . . . . . . . . . . . . 0

47 – 48 . . . . . . . . . . . . . . . . . . 11

49/50 . . . . . . . . . . . . . . . . . . . . 11

51 . . . . . . . . . . . . . . . . . . . . . . 11

52 – 55 . . . . . . . . . . . . . . . . . . . 0

56 . . . . . . . . . . . . . . . . . . . . . . 11

57/58 . . . . . . . . . . . . . . . . . . . . 11

59 – 60 . . . . . . . . . . . . . . . . . . 11

61 – 62 . . . . . . . . . . . . . . . . . . 24

62A/62B . . . . . . . . . . . . . . . . . 24

63 – 67 . . . . . . . . . . . . . . . . . . . 0

68 . . . . . . . . . . . . . . . . . . . . . . 24

69 – 70 . . . . . . . . . . . . . . . . . . . 0

71 – 72 . . . . . . . . . . . . . . . . . . 24

73/74 . . . . . . . . . . . . . . . . . . . . 24

75 . . . . . . . . . . . . . . . . . . . . . . 11

76 – 77 . . . . . . . . . . . . . . . . . . . 0

78 . . . . . . . . . . . . . . . . . . . . . . 11

79 – 80 . . . . . . . . . . . . . . . . . . . 0

81/82 . . . . . . . . . . . . . . . . . . . . . 0

83 – 86 . . . . . . . . . . . . . . . . . . . 0

87/88 . . . . . . . . . . . . . . . . . . . . . 0

89 – 96 . . . . . . . . . . . . . . . . . . . 0

97/98 . . . . . . . . . . . . . . . . . . . . . 0

99 – 102 . . . . . . . . . . . . . . . . . . 0

VOLUME 9

Cover . . . . . . . . . . . . . . . . . . . 24

Title . . . . . . . . . . . . . . . . . . . . . 24

PN . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 71

1 – 2. . . . . . . . . . . . . . . . . . . . . 24

3/4 . . . . . . . . . . . . . . . . . . . . . . 24

5 – 6. . . . . . . . . . . . . . . . . . . . . 11

7 – 9. . . . . . . . . . . . . . . . . . . . . . 0

10. . . . . . . . . . . . . . . . . . . . . . . 11

11 – 12. . . . . . . . . . . . . . . . . . . . 0

13. . . . . . . . . . . . . . . . . . . . . . . 11

14 – 16. . . . . . . . . . . . . . . . . . . 24

16A – 16B . . . . . . . . . . . . . . . . 24

16C/16D . . . . . . . . . . . . . . . . . 24

17 – 22. . . . . . . . . . . . . . . . . . . 19

22A/22B. . . . . . . . . . . . . . . . . . 19

22C – 22I . . . . . . . . . . . . . . . . . 19

22J – 22P . . . . . . . . . . . . . . . . 20

22Q/22R . . . . . . . . . . . . . . . . . 20

23 – 24. . . . . . . . . . . . . . . . . . . 24

25 – 26. . . . . . . . . . . . . . . . . . . . 0

27 – 28. . . . . . . . . . . . . . . . . . . 13

29 – 32. . . . . . . . . . . . . . . . . . . . 0

33 – 34. . . . . . . . . . . . . . . . . . . 11

35/36 . . . . . . . . . . . . . . . . . . . . 11

Chapter 75

1/2 . . . . . . . . . . . . . . . . . . . . . . . 0

3 – 4. . . . . . . . . . . . . . . . . . . . . . 0

Chapter 76

1/2 . . . . . . . . . . . . . . . . . . . . . . 19

3 – 4. . . . . . . . . . . . . . . . . . . . . 19

5. . . . . . . . . . . . . . . . . . . . . . . . 24

6 – 14. . . . . . . . . . . . . . . . . . . . 19

15. . . . . . . . . . . . . . . . . . . . . . . 24

16 – 22. . . . . . . . . . . . . . . . . . . 19

Chapter 79

1/2 . . . . . . . . . . . . . . . . . . . . . . 20

3 – 6. . . . . . . . . . . . . . . . . . . . . . 0

7/8 . . . . . . . . . . . . . . . . . . . . . . . 0

9 – 10. . . . . . . . . . . . . . . . . . . . . 0

11/12 . . . . . . . . . . . . . . . . . . . . . 0

13 – 14. . . . . . . . . . . . . . . . . . . 20

15/16 . . . . . . . . . . . . . . . . . . . . 20

VOLUME 10

Cover . . . . . . . . . . . . . . . . . . . . 24

Title . . . . . . . . . . . . . . . . . . . . . 24

PN . . . . . . . . . . . . . . . . . . . . . . 24

D Rev. 24 18 JUL 2019

BHT-206L4-MM-1

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Export Classification C, ECCN EAR99

Chapter 95

1 – 2 . . . . . . . . . . . . . . . . . . . . . .0

3/4 . . . . . . . . . . . . . . . . . . . . . . .0

5 – 15 . . . . . . . . . . . . . . . . . . . . .0

16 . . . . . . . . . . . . . . . . . . . . . . .11

17/18 . . . . . . . . . . . . . . . . . . . . .0

19 . . . . . . . . . . . . . . . . . . . . . . .11

20 – 22 . . . . . . . . . . . . . . . . . . . .0

23/24 . . . . . . . . . . . . . . . . . . . .24

25 – 26 . . . . . . . . . . . . . . . . . . .14

27 . . . . . . . . . . . . . . . . . . . . . . . .0

28 . . . . . . . . . . . . . . . . . . . . . . .11

29/30 . . . . . . . . . . . . . . . . . . . . .0

31/32 . . . . . . . . . . . . . . . . . . . . .0

Chapter 96

1 – 4 . . . . . . . . . . . . . . . . . . . . .24

5/6 . . . . . . . . . . . . . . . . . . . . . .24

7 – 10 . . . . . . . . . . . . . . . . . . . . .0

11/12 . . . . . . . . . . . . . . . . . . . . .0

13 – 16 . . . . . . . . . . . . . . . . . . .24

16A – 16D . . . . . . . . . . . . . . . .24

16E/16F . . . . . . . . . . . . . . . . . 24

17 – 27 . . . . . . . . . . . . . . . . . . . 0

28 . . . . . . . . . . . . . . . . . . . . . . 11

29/30. . . . . . . . . . . . . . . . . . . . . 0

31 – 35 . . . . . . . . . . . . . . . . . . . 0

36 . . . . . . . . . . . . . . . . . . . . . . 11

37 – 38 . . . . . . . . . . . . . . . . . . . 0

39/40. . . . . . . . . . . . . . . . . . . . . 0

41 – 46 . . . . . . . . . . . . . . . . . . . 0

47/48. . . . . . . . . . . . . . . . . . . . . 0

49/50. . . . . . . . . . . . . . . . . . . . . 0

51 – 54 . . . . . . . . . . . . . . . . . . 19

55/56. . . . . . . . . . . . . . . . . . . . 19

VOLUME 11

Cover . . . . . . . . . . . . . . . . . . . 11

Title. . . . . . . . . . . . . . . . . . . . . 11

PN. . . . . . . . . . . . . . . . . . . . . . 11

Chapter 97

1 – 26 . . . . . . . . . . . . . . . . . . . . 0

27/28 . . . . . . . . . . . . . . . . . . . . . 0

VOLUME 12

Cover . . . . . . . . . . . . . . . . . . . 24

Title . . . . . . . . . . . . . . . . . . . . . 24

PN . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 98

1 . . . . . . . . . . . . . . . . . . . . . . . 24

2 . . . . . . . . . . . . . . . . . . . . . . . 20

3/4 . . . . . . . . . . . . . . . . . . . . . . 20

5 . . . . . . . . . . . . . . . . . . . . . . . 20

6 . . . . . . . . . . . . . . . . . . . . . . . 24

7 . . . . . . . . . . . . . . . . . . . . . . . 20

8 . . . . . . . . . . . . . . . . . . . . . . . 24

9 – 15 . . . . . . . . . . . . . . . . . . . 20

16 – 18 . . . . . . . . . . . . . . . . . . 24

18A/18B . . . . . . . . . . . . . . . . . 24

19 – 58 . . . . . . . . . . . . . . . . . . 20

18 JUL 2019 Rev. 24 E/F

H ELP

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L OGISTICS

P UBLICATIONS

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Export Classification C, ECCN EAR99

BHT-206L4-MM-1

25 JUN 2019 Rev. 23 Warranty

SPARE PARTS WARRANTY

ONE YEAR/1,000 HOURS PRORATED

WARRANTY AND REMEDY: Seller warrants each new helicopter part or helicopter part reconditioned by seller to be free from defect

in material and workmanship under normal use and service and if installed on Bell model helicopters. Seller’s sole obligation under this

warranty is limited to replacement or repair of parts which are determined to Seller’s reasonable satisfaction to have been defective

with 1,000 hours of operation or one (1) year after installation, whichever occurs first and reimbursement of reasonable freight charges.

After 200 hours of use, there will be a prorated charge to the Purchaser for replacement parts (prorating the hours of total use against

the then applicable part life or 2,000 hours, whichever is the lesser). Defective parts must be reported in writing to the Seller’s Warranty

Administration within 90 days of being found defective. Replacement of parts may be with either new or reconditioned parts, at Seller’s

election. Warranty adjustment is contingent upon the Purchaser complying with the Warranty Remedies as described in the

Commercial Warranty Information brochure and the Seller’s Warranty Administration disposition instructions for defective parts. Failure

to comply with all of the terms of this paragraph may, at Seller’s sole option, void this warranty.

NOTE: Parts, components and assemblies of all new helicopters may have been restored or reworked due to mars, blemishes, dents

or other irregularities during the manufacturing process. Such restoration and/or rework is permitted under Seller’s approved

manufacturing and engineering processes and guidelines. The restoration and/or rework so completed does not render such items

defective in material or workmanship.

THIS WARRANTY IS GIVEN AND ACCEPTED IN PLACE OF (i) ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANT ABILITY AND

FITNESS FOR A PARTICULAR PURPOSE AND (ii) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACTOR

IN TORT (DELICT), INCLUDING PRODUCT LIABILITIES BASED UPON STRICT LIABILITY, NEGLIGENCE, OR IMPLIED

WARRANTY IN LAW.

This warranty is the only warranty made by Seller. The Purchaser’s sole remedy for a breach of this warranty or any defect in a part is

the repair or replacement of helicopter parts and reimbursement of reasonable freight charges as provided herein. Seller excludes

liability, whether as a result of a breach of contract or warranty, negligence or strict product liability, for incidental or consequential

damages, including without limitation, damage to the helicopter or other property, costs and expenses resulting from required changes

or modifications to helicopter components and assemblies, changes in retirement lives and overhaul periods, local customs fees and

taxes, and costs or expenses for commercial losses or lost profits due to loss of use or grounding of helicopters or otherwise.

Seller makes no warranty and disclaims all liability in contract or in tort (delict), including, without limitation, negligence and strict tort

(delictual) liability, with respect to work performed by third parties at Purchaser’s request and with respect to engines, engine

accessories, batteries, radios, and avionics, except Seller assigns each manufacturer’s warranty to Purchaser to the extent such

manufacturer’s warranty exists and is assignable.

This warranty shall not apply to any helicopter part which has been repaired or altered outside Seller’s factory in any way so as, in

Seller’s judgment, to affect its stability, safety or reliability, or which has been subject to misuse, negligence or accident, or which has

been installed in any aircraft which has been destroyed unless that helicopter has been rebuilt by Bell. A list of destroyed aircraft is

obtainable from Bell Product Support. Repairs and alterations which use or incorporate parts and components other than genuine Bell

parts or parts approved by Bell for direct acquisition from sources other than Bell itself are not warranted by Bell, and this warranty shall

be void to the extent that such repairs and alterations, in Seller’s sole judgment, affect the stability, safety or reliability of the helicopter

or any part thereof, or damage genuine Bell or Bell-approved parts. No person, corporation or organization, including Bell Customer

Service Facilities, is authorized by Seller to assume for it any other liability in connection with the sale of its helicopters and parts.

NO STATEMENT, WHETHER WRITTEN OR ORAL, MADE BY ANY PERSON, CORPORATION OR ORGANIZATION, INCLUDING

BELL CUSTOMER SERVICE FACILITIES MAY BE TAKEN AS A WARRANTY NOR WILL IT BIND SELLER.

Seller makes no warranty and disclaims all liability with respect to components or parts damaged by, or worn due to, corrosion. Seller

makes no warranty and disclaims all liability for consumables (wear items) which are defined as items required for normal and routine

maintenance or replaced at scheduled intervals shorter than the warranty period. “Consumables” include but are not limited to engine

and hydraulic oil, oil filters, packings and o-rings, anti-corrosion and/or sealing compounds, brush plating material, nuts, bolts, washers,

screws, fluids, compounds, and standard aircraft hardware that is readily available to aircraft operators from sources other than Seller.

All legal actions based upon claims or disputes pertaining to or involving this warranty including, but not limited to, Seller’s denial of any

claim or portion thereof under this warranty, must be filed in the courts of general jurisdiction of Tarrant County, Texas or in the United

States District Court for the Northern District of Texas, Ft. Worth Division located in Ft. Worth, Tarrant County, Texas. In the event that

Purchaser files such an action in either of the court systems identified above, and a final judgment in Seller’s favor is rendered by such

court, then Purchaser shall indemnify Seller for all costs, expenses and attorneys’ fees incurred by Seller in defense of such claims. In

the event Purchaser files such a legal action in a court other than those specified, and Seller successfully obtains dismissal of that

action or transfer thereof to the above described court systems, then Purchaser shall indemnify Seller for all costs, expenses and

attorneys’ fees incurred by Seller in obtaining such dismissal or transfer.

January 2007

Export Classification C, ECCN EAR99

BHT-206L4-MM-1

BULLETIN RECORD

Unless otherwise specified, all applicable Alert Service Bulletins and Technical Bulletins issued prior to and

including the bulletins listed below have been incorporated in this manual. Subsequent applicable bulletins will be

incorporated in future revisions/reissues.

ALERT SERVICE BULLETINS

ASB NUMBER SUBJECT DATE

206L-11-169 Clevis Assembly – Hydraulic Servo Assemblies,

P/N 206-076-062-103

29 August 2011

The following Alert Service Bulletins have not been incorporated: 206L-11-168.

TECHNICAL BULLETINS

TB NUMBER SUBJECT DATE

206L-12-246 Fuel Transfer Pump and Centrifugal Boost Pump Canister,

Upgrade of.

30 October 2012

The following Technical Bulletins have not been incorporated: 206L-12-244, 206L-09-239, 206L-07-227,

206L-07-225, 206L-07-223, 206L-02-207, 206L-01-209, 206L-01-204, 206L-00-203, 206L-96-189,

206L-96-187, 206L-95-182, 206L-95-180, and 206L-95-178.

Technical Bulletins issued prior to 1990 are currently being reviewed for incorporation and the BR page will

be updated to reflect this information at a future revision.

1

25 JUN 2019 Rev. 23 BR

Export Classification C, ECCN EAR99

BHT-206L4-MM-1

TEMPORARY REVISION RECORD

This Temporary Revision Record provides a current listing of active Temporary Revisions against the manual.

Temporary Revisions, which have been canceled/incorporated, will only be maintained on the record until the next

revision is issued. If there are no Temporary Revisions shown on the record, this is confirmation that there are no

Temporary Revisions issued against the manual.

TEMP. REV. NO. TITLE DATE ISSUED DATE CANCELED

TR Rev. 23 25 JUN 2019

NOTE: For tracking purposes, Temporary Revisions are now being numbered (Example: TR-1).

Export Classification C, ECCN EAR99

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