14910-13-P]

RIN 2120-AA64 Federal Aviation Administration DEPARTMENT OF TRANSPORTATION



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# i2-0S (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 14CFR Part 39

ACTION: Notice ofproposed rulemaking (NPRM).

panels inthe main equipment center; making certain wiring changes; installing new G t 

## 1> SUMMARY: Wepropose to adopt anew airworthiness directive (AD) forcertain Mo 

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# DC) 777-200, -200LR, -300, and -30GER series airplanes. This proposed AD would require, ON forcertain airplanes, replacing certain boost pump relays with ground fault intenupter (GFD relays. For certain other airplanes, this proposed AD would require installing ne relays inthe new panels; installing new e!ectricalload management system (ELMS) software. Forcertain other airplanes, this proposed AD would require doing certain bo resistance measurements, and corrective actions ifnecessary. This proposed AD results rNrn.cs.;;IGN"U~. from fuel system reviews conducted bythe manJlfacturer. We are proposing this AD to O"~ prevent the pOlentialofignition sourceS inside fuel tanks, which, incombination with flammable fuel vapors, could result inafuel tank explosion and consequent loss ofthe airplane. DATES: We must receive comments onthis proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe 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 

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~oun"G SY.~l>OLR ACTION: Notice ofproposed rulemaking (NPRM). ANtJ1- J:SOS

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# if SUMMARY: We propose to adopt anew aIf\Vortmness dlrechve (AD) forcertaIn Mod 1 ~_ - DAlE 777-200, -200LR, -300, and -300ER series airplanes. This proposed AD would require, 

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# /1" forcertain airplanes, replacing certain boost pump relays with ground fault interrupter (OFI) relays. For certain other airplanes, this pf0posed AD would require illstalling ncV\ panels inthe main equipment center; making certain wiring changes; installing new GF 

### "AT"/~:/'"O QUTItlG '<""SQ', relays inthe new panels; installing new electrical load management system (ELMS) 

# 1. I"m ' rf\-. software. For certain other airplanes, thisproposed AD would require doing certain bon

__;; .- I • ~ resistance measurements, and corrective actionS[' ifnecessary. This proposed AD results 

# "///JJo l'OUlIN'; SYM"(Jl from fuel system reviews conducted bythe manufacturer. We areproposing this AD to prevent the potential ofignition sources inside fuel tanks, which, in combination with flanunable fuel vapors, could result inafuel tank explosion and consequent loss ofthe airplane. DATES: We must receive comments ontillsproposed AD by [INSERT DATE 45

. I DAYS AFTER DATE OF PUBLICA nON IN THE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:
• Federal eRulemaking Portal: Go to htth:l/wvlVv.regulations.gOv. Follow the instructions for submitting comments. '''IllAL.5.1SIG ,

INI1lAlS/51G 

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DATE