14910-13-P]

RIN 2120-AA64

Federal Aviation Administration

DEPARTMENT OF TRANSPORTATION

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(Docket No. FAA-2010-++++j Directorate Identifier 201O-NM-146-AD)

-300ER Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and

14 CFR Part 39

ACTION: Notice of proposed rulemaking (NPRM).

panels in the main equipment center; making certain wiring changes; installing new G

t 1>

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Mo efl1l~(DC)

777-200, -200LR, -300, and -30GER series airplanes. This proposed AD would require, ON

for certain airplanes, replacing certain boost pump relays with ground fault intenupter

(GFD relays. For certain other airplanes, this proposed AD would require installing ne

relays in the new panels; installing new e!ectricalload management system (ELMS)

software. For certain other airplanes, this proposed AD would require doing certain bo

resistance measurements, and corrective actions if necessary. This proposed AD results rNrn.cs.;;IGN"U~.

from fuel system reviews conducted by the manJlfacturer. We are proposing this AD to O"~

prevent the pOlential of ignition sourceS inside fuel tanks, which, in combination with

flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the

airplane.

DATES: We must receive comments on this proposed AD by [INSERT DATE 45

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to hnp://www.reeulations.gov. Follow the

instructions for submitting comments.

FAA Form 1360-14.1 (6-89) OFFICIAL FILE COPY

1:f u.s. GOVEf1NMENT rRINTING OFFICE: 1995· 709·211
[4910-13-P]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-++++; Directorate Identifier 2010-NM-146-AD]

RIN 2120-AA64

Airworthiness Directives; The Boeing Company Model 777-200, -200LR, ~300, and

-30GER Series Airplanes I

AGENCY: Federal Aviation Administration (FAA), DOT.

,ONCURRE:"lC~S

~'J\ln"Gs,"'eOL

Ib 2. I

~oun"G SY.~l>OLR

ACTION: Notice of proposed rulemaking (NPRM). ANtJ1- J:SOS

. • •. • jWTIAl.'i/:'<; • if

SUMMARY: We propose to adopt a new aIf\Vortmness dlrechve (AD) for certaIn Mod 1 ~ _ -

DAlE

777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would require, Fh /1"

for certain airplanes, replacing certain boost pump relays with ground fault interrupter

(OFI) relays. For certain other airplanes, this pf0posed AD would require illstalling ncV\

panels in the main equipment center; making certain wiring changes; installing new GF "AT"/~:/'"O

QUTItlG '<""SQ',

relays in the new panels; installing new electrical load management system (ELMS) 1.

I"m ' rf\-.

software. For certain other airplanes, this proposed AD would require doing certain bon __ ;; .-

I • ~

resistance measurements, and corrective actionS['if necessary. This proposed AD results "///JJo

l'OUlIN'; SYM"(Jl

from fuel system reviews conducted by the manufacturer. We are proposing this AD to

prevent the potential of ignition sources inside fuel tanks, which, in combination with

flanunable fuel vapors, could result in a fuel tank explosion and consequent loss of the

airplane.

DATES: We must receive comments on tills proposed AD by [INSERT DATE 45

. I

DAYS AFTER DATE OF PUBLICA nON IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

• Federal eRulemaking Portal: Go to htth:l/wvlVv.regulations.gOv. Follow the

instructions for submitting comments.

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INI1lAlS/51G

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DATE