14910-13-PI

DEPARTMENT OF TR<I-"ISPORTATION

Federal Aviation Administration

14 CFR Part 39

IJlmp,LSlS1G

(l)ocket No. FAA-2009-0906j Directorate Identifier2009-NM-075-ADj Amendmen V.} ~(1

J~~~JAD**120/0-12:'-/2.

RIN 2120-AA64

A10!l1-j"{6 t

Ainvorthiness Directivesj The Boeing Company Model 747-100, 747-1 OOB, 747-1 OOBIJlITIA~SIG

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G.p~.(r~

SUO, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-4000, 747-400F, 747S '" ,/

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and 747SP Series Airplanes ovnNG SV"BO~

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ovnNG Ml!Ol.

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DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF

PUBLICATION IN THE FEDERAL REGISTER].

to prevent damage to the fuel pumps caused by electrical arcing that could introduce an

ignition source in the fuel tank, which, in combination with flammable fuel vapors, coul

result in a fuel tank explosion and consequent loss of the airp!ane.

results from fuel system reviews conducted by the manufacturer. We are issuing this A

with new relays having a ground fault interrupt (GFI) feature. This AD also requires

fuel boost pumps and jettison pumps, and the center tank scavenge pump, as applicable,

28-A WL-23 (for Model 747-100, 747-] OOB, 747-100B SUD, 747-200B, 747-200C,

I

747-200F, 747-300, 747SP, and 747SR series aU-planes), and AWLs 28-A WL-28 and

28-A WL-29 (for Model 747-400, 747-4000, and 747-400F series airplanes). This AD

series airplanes. This AD requires replacing the power control relays for the main tank

ACTION: Final rule. ~", /. /,

"1/23 '0

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Model 74 """"115_

:5ER -At="C::t

revising the maintenance program to incorporate Airworthiness Limitations (A WLs)

AGENCY: Federal Aviation Administration (FAA), DOT.
(4910-13-PI

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

39-**; AD **1

RIN 2120-AA64 IWflNGSYM60L

ffl0fO-i?OS e

Ain'l'orthiness Directives; The Boeing Company Model 747-100, 747-1 OOB,747~lOOBTmA~SIG

G.pl.tu.-aSUD, 747-2008, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR ~" __

~I, .;)4/0

and 747SP Series Airplanes OU11NGsYM60L

.bNIl'I-J5u~£Hil

fuel boost pumps and jettison pumps, and the center tank scavenge pump, as applicable,

with new relays having a ground fault interrupt (GFI) feature. This AD also requires

revising the maintenance program to incorporate Airworthiness Limitations (AWLs)

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Model 7

series airplanes. This AD requires replacing the power control relays for the main tank

28-AWL-23 (for Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C,

747-200F, 747-300, 747SP, and 747SR series airplanes), and AWLs 28-A WL-28 and

28-A WL-29 (for Model 747-400, 747-400D, and 747-400F series airplanes). This AD

results from fuel system reviews conducted by the manufacturer. We are issuing this

to prevent damage to the fuel pumps caused by electrical arcing that could introduce an

OVONG sy ••aOl.

~1t())

T"''''"

or

ignition source in the fuel tank, which, in combination with flammable fuel vapors, coul

result in a fuel tank explosion and consequent loss of the airplane.

DATES: This AD is elIective [INSERT,DATE 35 DAYS AFTER DATE OF

PUBLICATION IN THE FEDERAL REGISTER].

NmAlSISIC