(4910-13-P1

14 CFR Port 39

DEPARTMENT OF TRANSPPRTA nON

Federal Aviation Administration

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IDocket No. FAA-2010-++++j Directorate [dcntifier 2010-NM-006-AD)

RJN 2120-AA64

Airworthiness Directives; The Boeing Company Model 747-400 and -4000 Series

Airplanes

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AGENCY: Federal Aviation Adnlluistration (FAA), DOT. i-fNNf- {61

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ACTION: Noliee of proposed ru1emaking (NPRM). Ol~",_

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SUMMARY: We propose to adopt a new airv..'orthiness directive (AD) for certain Mod I 1,/(2.'1Iv

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inspection to deternline the routing ofthe wire bundles in the number two and nW11ber

747-400 and -4000 series airplanes. This proposed AD would require a general visual

three enhrlne pylons near the leading edge, and related investigative and C01Tective

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actions, if necessary. For certain,airplanes, this proposed AD would also require certain

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concurrent actions. This proposep AD results from a report of a fuel leak from the drainl

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line of the number tv.'o engine pylon. We are proposing this AD to detect and concct

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chafing of the main fuel feed tube and the alternating current motor-driven hydraulic

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pump wire bundle, which could lead to arcing from the exposed wire to the fuel feed

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tube, and could result in a fire or:explosion.

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

I

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

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

,

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• Federal eRulemaking Portal: Go to http://w~''w.regulatiot1s.gov. Follow the

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[NLTLAI.5ISIG

DAT[

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Instructions for submitting COl1llnents.

• Fax. 202-493-2251.

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149JO-I3-PJ

DEPARTMENT OF TRANSPQRTATION

Federal Aviation Administration _OtlCVRR~tlC~S

O\1T1NG SY"'801.

14 CFR ParI 39

IDocket No. FAA-2010-++++; Directorate Identifier 201O-NM-006-ADI

RJN 2J20-AA64

Ainvorthiness Directives; The Boeing Company Model 747-400 and -400D Series

Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Mod

or explosion.

747-400 and -4000 series airplanes. This proposed AD would require doing an OArE

inspection of wire bundles for diage (chafing) in the number two and number three ouhng 5Y"'OQI

engIne . PY1ons near t

hid' e ea mg e~ge, ~ and domg .

re]aled'Investigative .. /corrective.actIOns, .I

.

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number two engine pylon. We are proposing this AD to detect and correct chafing of the kiA.t 4:.0..1.- £.. OUTING sYKIlOl.

main fuel feed tube and the alternating current motor-dnven;fwnp wire bundle, which

could lead to arcing from the exposed wire to the fuel feed tube, and could result in a fir'

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necessary. This proposed AD results from a report ofa fuel leak from the drain line ofth

OUTING sY"5Ol.

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

NTTlALS/SIG

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

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

ovrmG SYMBOl

• Federal eRulemaking Rortal: 00 to http://www.regulatlons.Q.ov. Follow the

• • C b' I

instructIOns lor su mlltmg comments

• Fax: 202-493-2251.