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### RIN 2120-AA64 [4910-13-P] Federal Aviation Administration

listed above. This proposed AD would require replacing the existing unshielded fuel Airworthiness Directives; The Boeing Company Model 727, 727C, 727-100, 727-100 727-200, and 727-200F Series Airplanes AGENCY: Federal Aviation Administration (FAA), DOT.

quantity indication system (FQIS) wire bundles with double shielded FQIS wirebundle , ~f 

## \'L installing anew wire feed through fitting, and grounding the wire shields, asapplicable; $"MIIO 

### [Docket No. FAA-2010-++++; Directorate Ideotifier 2010-NM-226-AD)

ACTION: Notice ofproposed mlemaking (NPRM). SUMMARY: Wepropose to adopt anew airworthiness directive (AD) fortheproducts 14CFR Part 39 DEPARTMENT OF TRANSPORTATION

and doing repetitive low frequency eddy current (LFEC) inspections forcracking uftbe ilIln"l.S'SlG 

### fuselage skin, and corrective actions ifnecessary, This proposed AD also would requITe um 

### revising the maintenance program to incorporate certain airworthiness limitations, This J«)ur!~'mMIl()I, 

### proposed AD was prompted by fuel system reviews conducted bythe manufacturer. We INITIALS/SKi 

### areproposing this AD toincrease the level ofprotection from lightning strikes and om 

### prevent the potential ofignition sources inside fuel tanks, which, incombination with iTI:I'GSI'MOOI. 

### flammable fuelvapors, could result infuel tank explosions and consequent loss ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 SYl>!1lO1. 

### DAYS AFTER DATE OFPUBLICA nON INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods:14910-13-PI DEPARTM.ENT OF TR"NSPORTATION :U>=.~I""lS wn"..;s,><a(O;

listed above. This proposed AD would require replacing the existing unshielded fuel •••• ~-- J AN1\(- 1 

### os quantity indication system (FQIS) wire bundles with double shielded FQIS wire bundles 

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proposed AD was prompted by fuel system revieivs conducted by the manufacturer. We areproposing this AD to increase the level ofprotection from lightning strikes and prevent the potential ofignition sources inside

# rJel tanks, which, in combinaiion with revising the mainlenance program to incorporate certain airworthiness limitations. This and doing repetit.ive low frequency eddy current (LFEC) inspections for cracking afme fuselage skin', and corrective actions ifnecessary] This proposed AD also would require installing anew wire feed-through fining, and grounding the wire shields, as applicable; IDocket No. FAA-2010-++++; Directorate Identifier 20JO-NM-ZZ6-ADI Airworthiness DiI"ectives; The Boeing Company Model 727>727C, 727-100, 727-J00 727-200, and 727-200F Series Airplanes RIN 2120-AA64

ACTION: Notice ofproposed rulemaking (NPRM). AGENCY: Federal Aviation Administration (FAA), DOT. SUi\fMARY: We propose to adopt anew airworthiness direc.tive (AD) forthe products Federal Aviation Administration 14CFR Part 39

Oammable fuel vapors, could result in fuel tank ~.''(plosions and consequent loss ofthe "'3 _<l<1Tl .S',t<I>;)L airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 

## " DAYS AFTER DATE OFPUBLICATION INrFEDERAL REGISTER). ADDRESSES: You may send comments by any of the following methods:14910-I3-PI DEPARTMENT OF TRo\.i\'SPORT ATION "'~=O"-'~L~ ·tlc·n»-~ ~,.",~'" 

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listed above. This proposed AD would require replacing the existing unshicldcd fuel """·0 Son""" 3 JtNfIt- { 

### os quantity indication system (FQIS) wire bundles \IVith double shielded FQlS wire hUlldlcs 

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### V installing anew wire feed-through fitting, and grounding lhc wire shields, as aprlicable; 

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# n/,/" and doing repetitive low frequency eddy current (LFEC) inspections forcracking ofthe 

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### "IN,:'- tooY" IDocket No. F'AA-201O-++++; Directorate Identifier 

### 2010~NM-226-Anl
727-200, and 727-200F Series Airplanes I AGENCY: Pedcral Avi<.ltion Administration (FtA), DOT. ACTION: Notice ofproposed nllemaking (NPRM). SUMMARY: We propose to adopt anew air"./orthiness directive (AD) for the products Airworthiness Directins; The Boeing Company Model 727, 727C, 727-100, 727-10 RIN2120-A ...

,\64 14CFR Pan 39 Federal AVi'ltion Administration



# \ fuselage skin, and corrective actions 

### ifnecessary. This proposed AD also would require

revising the maintenance program to incorporate certain ainvorthiness limitations. This pmposed AD was prompted by fuel system 

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# We arc proposing this AD to increase the level ofprotection from lightning strikes and prevem the potential ofignition sources inside file! tanks, which, incombinatioll \vith nammable fuel vapors, could result in fuel tank explosions and consequent loss ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGJSTER}. ADDRESSES: YOli may send comments by any ofthe following methods: 

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