14910-I3-P]

DEPARTMENT OF TRANSPORT AnON

Federal Aviation Administration

14 eFR Part 39

,o-ODL{)

[Docket No. FAA-2~-1 I I I I; Directorate Identifier 2009-NM-128-AD}

RIN 2120-AA64

Airworthiness Directives; McDonnell Douglas Corporation Model DC-l O~10.

DC-IO-IOF, and MD-I O-IOF Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulcmaking (NPRM).

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

McDonnell Douglas Model DC-I 0-10, DC-IO-IOF, and MD-IO-IOF airplanes. This

proposed AD would require a one-time high frequency eddy current inspection of

fastener holes for cracks at the left and right side wing rear spar lower cap at station

Xors=345, and other specified and corrective actions as necessary. This proposed AD

results from a report of three instances of Model DC-1O-1OFairplanes having fuel leaks

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in the wing rear spar lower cap at station Xors=345. We are proposing this AD to preve t

cracks in the spar cap, which ifnol corrected could lead to cracking of the lower wing (Q1)1TNG SYMI",c

NIT~\LSlSIG skin, fuel leaks, and the inability of the structure to sustain limit load.

DATES: We must receive comments on this proposed.J\.[) by [insert date 45 days after IE

date of publication in the FEDERAL REGISTER].

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

Q Federal eRu1cmaking Portal: Go to http://v{\vw.regulations.gov.Followthe

instructions for submitting comments.

• Fax: 202-493-2251.

lATE

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[4910-13-PJ

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

I-t CFR Part 39

[Docket No. FAA-2009-+++++; Directorate Identifier 2009-NM-128-AD]

RIN 2120-AA64

Airworthiness iJircctivcs; McDOImell Douglas Model DC-l0-10, DC-IO-lor. and

l\1D-1 0-1 OF Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed ruJemaking (NPRM).

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

McDonne.1l Dougl<.ls Model DC-lO-] 0, DC- J 0-1 OF, and MD-IO-I OF airplanes. This

proposed AD would require a one-time Iligh frequency eddy current inspection of

fastener holes for cracks at the left and right side wing rear spar lower cap at siation

Xors=345, and other specified and corrective actions as necessary. This proposcJ AD

result!;;from a re-port of three instances of mode! DC-l 0-101; airplanes having fuel leaks

in the wing rear spar lower cap at station Xors=345. We are proposing this AD to prev<::nt

cracks in the spar cap, which if not corrected could lead to cracking af the lov...·cr wing

skin, fud leaks, and the inability oftbe structure to sostainlimilload.

DATES: We must receive commenLs on this proposed AD by [insert date 45 days after

date ofpublication in the FEDERAL REG1STERJ.

AI)DRESSES: YOLlmay send commeniS by any ofthc following methods:

• Federal eRulemakin£ Portal: Go to http://w\\.\v.re£l1lations.gov. follow theinstructions for submitting commenlS.

'" Fax 202-493-225 J.

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FAA Fann 1360-14.1 (6-89) OFFICIAL FILE COPY