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Maintenance Planning document. The revision includes updated inspection requirements N'

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14eFR Part 39

2011-622.5

IDocket No. FAA~~-++++; Directorate Identifier 2010-NM-208-ADI

RJN 2120-AA64

Airworthiness Directivesj The Boeing Company Model 777 Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (J\TPRM).

SUI\'lMARY: We propose to adopt a new airworthiness directive (AD) for the products

listed above. This proposed AD would require revising the maintenance program by

incorporating subsection B, "Airworlhiness Limitations~ Stll.lctnral Inspections," orthe

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to detect fatigue cracking of principal structural elements (PSEs). This proposed AD

would specify !.heinitial perfonnance of certain repetitive inspections specified in the

AWLs to phase in those inspections. This proposed AD was prompted by a new revision

to the AWLs. We are proposing lhis AD to ensure that fatigue cracking of various PSEs

is detected and corrected; such fatigue cracking could adversely affect the structural

integrity of these airplanes.

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

DAYS AFTER DATE OF PUBLICATION IN THE Federal Register].

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

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the

instructions for submitting conunents.

• Fax: 202~49J-2251.

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.,":1:Q... integrity of these airplanes.

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow Lhe

instructions for submitting comments .

• Fax: 202-493-2251.

DATES: We must receive comments on this proposed AD by [INSERT DATE 4S

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

DAYS AFTER DATE OF PUBLICATION IN THE Federal Registerl

AWls to phase in those inspections. This proposed AD was prompted by a new revision

to the AWLs. We are proposing this AD to ensure that fatigue cracking of various PSEs

is detected and corrected; such fatigue cracking could adversely affect the structural

incorporating subsection B, «Airworthiness Limitations - Structural Inspections;' orthe

Maintenance Planning document. The revision includes updated inspection requirements INI'

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to delect fatigue cracking of principal structural elements (PSEs). This proposed AD ~

would specify the initial performance of cenain repetitive inspections specified in the

jDocket No. FAA-20ww-++++; Directorate Identifier 201G-NM-208-AD]

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

Airn'orthiness Directives; The Boeing Company Model 777 Airplanes

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

listed above. This proposed AD would require revising the maintenance program by

RIN 2.12Q-AA64

Federal Aviation Administration

DEPARTMENT OF TRANSPORTATION

14 CFR Part 39