Mooney SBM20-259 Owner's manual

Brand: Mooney

Model: SBM20-259

Type: Owner's manual

Mooney SBM20-259 is an aircraft maintenance service bulletin that provides instructions for inspecting and removing the fuel cap retaining lanyard on certain Mooney aircraft models. This service bulletin aims to prevent a situation where the fuel cap retaining lanyard captures the outboard fuel quantity float, leading to inaccurate fuel gauge readings. By following the instructions in this service bulletin, aircraft owners and maintenance personnel can ensure the proper functioning of the fuel system and accurate fuel level indications.

SERV ICE BUL LE TIN M20 - 259

IS SUE DATE: 1 Sep tem ber, 1996

SUB JECT:Fuel Cap As sem bly, in spec tion for re tain ing lan yard at tached be tween filler cap and cap

adapter as sem bly.

(REF ER ENCE AD # 97- 26- 08)

MOD ELS/S/N

AF FECTED: M20F- All S/N’s , M20J - All S/N’s thru 24- 3381

M20L - S/N 26- 0001 thru 26- 0041

TIME OF

COM PLI ANCE:Prior to next flight.

IN TRO DUC TION: There has been a re port of an out board fuel quan tity float be ing cap tured by the fuel cap

re tain ing lan yard fol low ing a fuel tank fill- up. Dur ing the pro cess of put ting the cap in place, the lan yard be -

came twisted in a po si tion that when the out board float low ered with the fuel level, it be came cap tured by the

lan yard loop and would not con tinue to fol low the fuel level down ward. If this situa tion oc cu rs, the in di ca tion of

the fuel gauge will show at least one- half tank of fuel re main ing in the tank when the tank is e mpty.

To re move the pos si bil ity of this situa tion oc cur ring in the fuel tank con figu ra tion of t he af fected air craft, the in -

spec tion and pro ce dures con tained in this SB must be com plied with im me di ately.

IN STRUC TIONS:

1.Open filler cap on each wing tank and in spect to see that the lan yard (ny lon type ma te rial) is at -

tached to the filler cap and to the wing filler cap adapter.

2.If the lan yard is at tached, the lan yard must be re moved from the filler cap as sem bly/ wing ad apter

as sem bly.

3.Pull filler cap as sem bly up and away from tank open ing and clip a slot in the end at tached to t he

wing adapter as sem bly. Pull the lan yard from this at tach ment point.

4. Clip a slot in the end at tached to the filler cap as sem bly and pull lan yard from filler cap as sem bly.

5.Re place filler cap as sem bly into the fuel tank adapter and close latch lever. Both LH & RH tanks

must have these in struc tions ac com plished.

6.Re turn air craft to serv ice. En ter com pli ance note into log book.

WAR RANTY: Moo ney Air craft Cor po ra tion will al low up to 0.5 hours la bor for the in spec tion and

com pli-ance with the in struc tions of this SB, if com pli ance pa per work is re ceived within 90 days

of the date of this SB.

REF ER ENCE

DATA:N/A

PARTS LIST:N/A

FIG URES/

TA BLES:N/A

THIS SERV ICE BUL LE TIN IS FAA AP PROVED FOR EN GI NEER ING DE SIGN

IN SURE NO PIECE OF LAN YARD FALLS INTO TANK.

Mooney SBM20-259 Owner's manual

Mooney SBM20-259 Owner's manual

Mooney SBM20-259 Owner's manual

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