### (4910-I3-P(

lmtIG SYMOOI

### Airplanes

products listed above. That NPRM proposed aonc-time inspection to detect damage of the wire assemblies ofthe tail tank fuel system, awiring change, and corrective actions Federal Aviation Administration

Ain"orthiness Directives; McDonnell Douglas Corporation Model MO-l] DEPARTMENT OF TRANSPORT AnON

AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Supplemental notice ofproposed rulemaking (NPRM); reopening ofcomme l /~ 

# D/,o period. SU.MMARY: We are revising anearlier proposed ainvorthiness directive (AD) forthe



# -H ILf 

# D2..21J [Docket No. FAA-2010-++++; Directorate Identifier 2009-NM-252-ADJ RIN 2120-AA64 14CFR Part 39

necessary. That NPRM was prompted by 

### fuel system reviews conducted by 

### the INITIALSISK; 

### manufacturer. This action revises that NPRM by 

### adding, for certain airplanes, ageneral b,,,,,,, ---- visual inspection forcon-ect installation ofthe self-adhering, high-temperature electricalk",,,",,,,,,,,,,;,,,,,,,",,,,~,,- insulation tape;"installation ofa wire assembly support bracket and routing wire INITIAlSISIG 

### assembly; changing wire supports; and installati.on of awire protection bracket. We are proposing this supplemental NPRM to detect and correct apotential ofignition sources inside fuel tanks, which, incombination with flammable vapors, could result ina fuel tank fire orexplosion, and consequent loss ofthe airplane. DATES: We must receive comments on this supplemental NPRM by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send comments by any ofthe following methods: AI" OI/l"INC SV"lOOl ~1II"'.$'S1U m 1m"" Sy>tOOl .~In.USlSlG w.n

### (4910-13-P]

DEPARTMENT OF TRANSPORTATION }1~ederalAviation Administration 14 CFR Part 39 (Docket No. FAA-2010-++++j Directorate Identifier 2009-NM-252-ADl 

### RIN 2120-.'1..'1.64 Airworthiness Directives; McDonnell Douglas Corporation Model MD-ll and MD-lIF Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Supplemental natke ofproposed rulemaking (NPRM); reopening of comment period. SUMMARY: We are revising an earlier proposed airworthiness directive (AD) for the products listed above. That NPRM proposed aonc-time inspection to detect damage of the wire assemblies ofthe tail tank fuel system, awiring change, and corrective actions 

### if necessary. That NPRM was prompted by fuel system reviews conducted by the manufacturer. This action revIses that NPRM by adding ageneral visual inspection for correct installation of the self-adhering, high~temperature electrical insulation tape, and changing wire supports. We are proposing this supplemental NPRM to detect and correct a potential of ignition sources inside fuel tanks, which, incombination with flammable vapors, could result in a fuel tank fire or explosion, and consequent loss of the airplane. DATES: We must receive comments on this supplemental NPRM by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN TI-IEFEDERAL REGISTER1- ADDRESSES: You may send comments by any of the following methods:
•Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submiuing comments . •Fax: 202-493-2251. 

## ,~ It It> ilOUlING Sl'W8Ol 

# ANtv\- l-

# Ul "'IT' , r E 

# -=-•.... ~" 10(. )1) RUU1'NGSr"'~()' 

### IC(O 

## C ",n,,..; 

## 1j:"l1J..; ~

__"_ CAr.

## IO/7jro H-O,lHNG Sl'U6OI, 

## UB-/i£G NT"'-s.'SlG •••••UIlE 

# - i! 

### b' 

## Iuh

## ItV "'l<.ffi"<GsnlllQ. )'tt)L ""~

FAAForm 1360-14.1 (5·89) OFFICIAL FILE COPY ,U.5. GO\fERNMENTPRINTlNG OFFiCE; 1995· 1~·21'