### 14910-13-Pj

14CFR ParI 39 DEPARTMENT OF TRANSPORTATION Feder-al Aviation Administration



# 120b (Docket No. FAA-2010-+t+++; Directorate Identifier 2009-NM-216-AD) ••• Tf.

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### RlJ'I2120-AA64 Airworthiness Directives; t0cDonnell Douglas Corporation Model OC-l 0-10, DC-IO-IOF, and MD-l0-10F Airplanes -/()

# h AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). 

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## \"1.-1'1--1" SUMMARY: We propose to adopt anew airworthiness directive (AD) forcertain Mod I n<GSV"lIOL 

### DC-l 0-10, DC-l 0-1OF,and MD-l 0-1OFairplanes. Thjs proposed AD would require repetitive inspections for cracking on the lower cap ofthe rear spar ofthe left and right wings between Stations Xors=417 andthe outboard edge ofthe lowercap splice ofthe wing rear spar at Station Xors=400; temporary and penllancnt repairs ifnecessary; and repetitive inspections ofrepaired areas. This proposed AD r~suJts from reports ofthree instances ofairplanes having afuel leak inthe lower cap ofthe wing rear spar at Station Xors=409. We are proposing this AD to detect and correct cracking on the lower cap oj 1~I'tIMSI~IG 

### the rear spar ofthe leftand right wings between Stations Xors=417 and the outboard cd c ofthe lower cap splice ofthe wing rear spar at Station Xors=400 that could result in fue

## """"'''~=''''"oo;m,C-- leaks or could spread to cracking ofthe lower wing skin and structure causing possible inability ofthe structure to sustain the limit load, which could adversely affect the 

## k,o;",----- structural integrity of1he airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER].149JO-13-PI

DEPARTMENT OF TRANSPORT AnON Federal Aviation .Administration 14CFR Part 39 

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(Docket No. FAA-2010-+++++; Directorate Identifier 2009-NM-216-AD) RIN 2120-AA64 Airworthiness Directives; McDonnell Douglas Corporation Model DC-l 0-10, DC~lO-10F, and MD-JO-IOF Airplanes AGENCY: Federal Aviation Administration (FAA), D<DT_ ACTION: Notice of proposed rulemaking (NPRM), SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain Model DC~10-10, DC-l 0-1OF,and MD-l 0-1OFairplanes. This proposed AD would require repetitive inspections for cracking on the lower cap of tJe rear spar ofthe left and right wings between Stations Xors=417 and the outboard edge of the lower cap splice of the \~ingrear spar at Station Xors=400; temporary and peJanent repairs ifnecessary; and repetitive inspections ofrepaired areas. This pr~posed ~D results from reports ofthree instances of airplanes having a fuel leak in the lower caJ of the wing rear spar at Station Xors=409_ We are proposing this AD to detect and corrlet cracking onthe lower cap of the rear spar of the left and r;ghl w;ngs between Stal;on1 Xors~417 and the outbomd edge ofthe lower cap splice of the wing rear spar at Station )(ors=400 that could result 111 fuel leaks or could spread to cracking of the lower wing skin and structure causing possible inability ofthe structure to sustain the limit load, which could adversely affect thestructural integrity ofthe airplane. OATES: We must receive conID1cnts on this proposed 

# to by[INSERT DATE 45 DAYS AFTER DATE OF PUBLICA nON IN THE FEDERAL REGISTER]. - 'Z.OL



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FAA Form 1350-14.1 (5-89) OFFICIAL FILE COP'r'i JU.S.OOV~~NM~NTP~"'TING OFF,C~, ,." .1G&-211

## 14910-13-PI

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 IDocket No. FAA-201 0- I I 1 I 1; Directorate Identifier 2009-NM-216~ADI RIN 2120-AA64 Airworthiness I)irectivcs; McDonnell Douglas CorpoT'ation Model DC-! 0-10, DC-lO-IOF, and MD-IO~IOF Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). SUMMARY; We propose to adopt a new airworthiness directive (AD) for certain Model DC-IO-lO, DC-1O-10F, and MD-lO-lOF airplanes. This proposed AD would require repetitive inspections for cracking on the lower cap of the rear spar ofthe left and right wings between Stations Xors=417 and the outboard edge of the lower cap splice of the wing rear spar at Station Xors=400, and related corrective actions jf necessary. This proposed AD results from reports ofthree instances ofairplanes having a fuel leak in the lower cap ofthe wing rear spar at Station Xors=409. ,e arc proposing this AD to detcct <lndcorrect cracking OlJthe lower cap ofthe rear spar 0rhe left and right wings between Slations Xors=417 and the outboard edge oflhe lower cap spUce ofthe wing rear spar at



# . I Station Xors=400 that could result in fuel leaks or could spread to cracking ofthe lower \-vingskin and structure causing possible lnability to sustain the limit load, which could adversely afteCl the structural integrity of the airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. NJI'-"
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FAA Form 1360-14.1 (6-89) OFFICIAL FILECOP~