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(4910-13-P -1

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 3:Z0/0- J 312-

(Docket No. FAA-2~-++++; Directoratc Identifier 2010-NM-220-ADj

RlN 2120-AA64

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

-30GER Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed mlemaking (NPRM). _ 0

NI"'Al$I~IG

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the product A;~hf2.l;IrY\"\

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listed above. This proposed AD would require installing foreign object debris (FOD) \ \ 0 III

rubber shields over the primary and secondary external power connectors for certain

airplanes, and wrapping fire-resistant silicone tape around the hydraulic tube for certai

other airplanes. This proposed AD was prompted by a report of a fire in the main

equipment center due to failure of an external power connector, which caused

high-temperature arcing and subsequent splatter of molten copper on an adjacent

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hydraulic tube, creating a hole in the tube and spraying hydraulic fluid into the power ,,'I'~

connector, resulting in a fire. In addition there were several reports of overheating or OU'I'ING5YMHOL

arcing of external power connectors, and one report of a fire due to arcing caused by NmAI.$I!iI<;;

FOD. We are proposing this AD to prevent FOD from entering the primary and

secondary external power connectors, which could result in overheating or arcing and "<;;SyMBOl.

consequent fire in the main equipment center. ,.mAl.S/Sl<;;

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

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:
[4910-13-PI

DEPARTMENT OF nUNS PORTATI ON

Federal Aviation Administration

14 eFR Part 39

(Docket No. FAA-2011-++++; Directorate Identifier 2010-NM-220-ADI

RIN 2120-.'1..'1.64

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

-300ER Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new ainvorthiness directive (AD) for the product

listed above. This proposed AD would require installing foreign object debris (FOD)

mbber shields over the primary and secondary external power COlmectors for certain

I 0.. ceTlo.l..,

atl:planes, and wrapping fire-resistant silicone tape around ~hydraulic tube for all - -

airplanes. This proposed AD was prompted by a report ofa fire in the main equipment

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center due to failure of an 'extemal power connector, which caused high-temperature ',M~ OS

arcing and subsequent splatter of molten copper on an adjacent hydraulic tube, creating '" "" '~,1,

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hole in the tube and spraying hydraulic fluid into the power connector, resulting in a fir 1'2-,./.3} 10

I dd" h I I f I' 'f I ·wn"CSl'''"Ol n a ltlon t ere were severa reports a oveneatlng or arclllg a extema power

connectors, and one report of a fire due to arcing caused by FOD. \Ve are proposing thi l",n~I.~rSIG

AD to prevent FOD from entering the primary and secondary external PQwer connec[f ~tTE

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which could result in overheating or arcing and consequent fire ll..r ce~'ft:f"" C-<fTl"" "~OOt

DATES: We must receive , conunents 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 eRulemakjng Portal: Go to http://www.refmlations.eov. Follow the ,

instructions for submitting c-omments.

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

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~rpb.nes ..This proposed AD \vas prompted by a report of a fire in the main equipment /:2 - 7-10

14 CFR Part 39

IDocket No. FAA-2011-++++; Directorate Identifier 201 O-NM-220-AD]

RIN 2120-AA64

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

-300ER Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulcmaking (NPRM).

SUMMARY: We propose to adopt a llew ainvonhincss directive (AD) for the product

listed above. This proposed AD would require installing foreign object debris (FOD)

rubber shields over the primary and secondary external power connectors for certain

<a..ce-do.i"'\

airplanes, and wrapping rire-resistant silicone tapc around ~hydraulic tube for all

~ -

center due to failure of an exlernal power connector, which caused high-temperature

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arclllg and subsequent splaner of' molten copper on an adjacent hydrauhc tube, crcatmg -I

hole in the lUbe and spraying hydraulic Jluid into the power connectof, resulting in a fir :."

In addition there were several reports of overheating or arcing of cxleml11 power

connectors, nnd one report of a fire due to arcIngcaused by FOD. We arc proposing thi ~,l""'-

.w to prevent FOD from enlering the primary and secondary external pQwcr connectQr ",."

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which could result in overheating or arcing and consequent fire in~ r;;eR~~:F." . -"".,,,,...,,"&<>1.

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 ofthc following methods:

• Federal eRulcmaking Portal: Go to http://www_ree.ulations.eov. Follow the

instructions for submitling comments.

."