### [4910-13-1'1

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration -ONCIJRRcNCES OVllNG SY"3Q~ 14CFR Part 39 

## .;2DII- DO~I rDocket No. FAA-~+++++; Directorate Identifier 2010-NM-127-AD] rrHTIAI.S{S1G DATE RlN 2120-AA64 1-a:o,.-10 Ainvorthiness Directives; 

### The Boeing Cornp3r].yModel 777-200 and -300 Series Airplanes Equipped with Rolls-Royce RB211 Trent 800 Engines AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Notice ofproposed rulemaking (NPRM). "OUTING SYMBOL

SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mode Nl{TIAlS;,sIG

. 'l~ 777-200 and -300 series airplanes. This proposed AD would require repetitive inspectio ATE, 

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## -1 II

OLm,tlC SYM60L 

## .. , proposing this AD to detect and correct adegraded TIRinner wall panel, which could lead to failure ofaT/R and adjacent components and their consequent separation from reverser events related to thermal damage ofthe thrust reverser inner wall. We are and corrective actions ifnecessary. This proposed AD results from reports ofthrust ofall thrust reverser (T/R) structure and sealant for degradation, and related investigativ 

## 1 tlmALS/51G 

### k the airplane, which could result inarejected takeoff (RTO) and cause asymmetric thrust ATE and consequent loss ofcontrol orthe airplane during reverse thrust operation. Ifathrust 

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~ reverse~verheats, separated components co~~amage toth - H

## 4 ItllnAL.$,'SlG airplane, damage to other airplanes, orpossible injury to people on the ground. DATES: We must receive comments on (his proposed AD by [INSERT DATE 45 

## I /0 

# !! RO G SYMOOL DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. - DO ADDRESSES: YOLL may send comments by any ofthe following methods: • Federal eRulemaking Portal: 

# Go to http://www.regulations.gov.Followthe instructions for submitting comments.14910-I3-P]

DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 [Docket No. FAA-2010-1 I I II; Directorate Identifier 2010-NM-127-AD] 

## f\Z"ci'a-G' :RIN 2120-AA64 

### 1-a.~IO Ainvorthiness Directives; The Boeing Compaqy Model 777-200 and -300 Series Airplanes Equipped with Rolls-Royce RE21t Trent 800 Engines AGENCY: Federal Aviation Administration (FAA), DOT. fl'0l\') 

### -1'iCD fY) (I"'" ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mod

"b - -" -(0

I (VTING SVM60L NmAlSfS1G 777-200 and -300 series airplanes. This proposed AD would require repetitive inspectio
proposing this AD to detect and correct adegraded T/R inner wall panel, which could lead to failure ofaT/R and adjacent components and their consequent separation from and corrective actions ifnecessary. This proposed AD results from reports ofthrust ofall thrust reverser (l/R) structure and sealant for degradation, and related investigativ
reverser events related tothermal damage ofthe thrust reverser inner wall. We are the airplane, which could result in arejected takeoff(RTO) and cause asymmetric thrust and consequent loss ofcontrol ofthe airplane during reverse thrust operation. Ifathrust i~ne; wall reversel;verheats, separated components co~~~amage to th airplane, damage to other airplanes, orpossible injury to people on the ground. DATES: We must receive comments on this proposed AD by [INSERT DATE 45 DAYS AJ'TER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. tITTIM.5!SIG ADJ>RESSES: You may send comments by any ofthe following methods: • Federal eRulemaking Portal: 

## Goto hnp://wv./w.rcgulations.gov. Follow the instructions for submitting comments.