14CFR Part 39 14910-13-PI DEPARTMENT OF TRANSP(j)RTATION Federal Aviation AdministratiJn



# 11.6& [Docket No. 

### FAA-2010~++++jDirectorate Identifier 201O-NM-128-AD) RlN 2120-AA64 NCURRt!NCL:, WUtlNG ',"",'"OL

D~TE

ROL'TING S\" ."ITIAI..';I"G Ainvorthincss Directives; The Boeing Company Model 777-200, -200LR., -300, and 

# t/-:1~ "'"lOU/ID -30GER Series Airplanes 

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## Y' i<OUTlNG SYMOOI. AGENCY: Federal Aviation Adfinistration (FAA), DOT ACTION: Notice ofproposed ru cmaking (NPRM:) l,M'l"E SUMlVIARY: We propose to ado t a new anworthiness duective (AD) for certain Mode 

# 11/ILliG I 777-200, -200LR, -300, and -30GER series airplanes. lbis proposed AD would require repetitive detailed inspections foidiSbOnding and tearing and measurements forwear of the. internal diam~ter (ID) ofth~ I aron-lined, bushings o~,the bUl.kh~a,ds~PPortj~CkSCre ~Ol1r GSVMilOL fittmg and of the Jackscrew fittmg ofthe hOrizontal stabilIzer; repetIttve mstallatlOns of the horizontal stabilizer trim actJtor (HST A); and if necessary, replacement of the 1,'ITIA'-'>'S1" bushings with new bushings and ill applicable related investigative and corrective 1""110 actions. This proposed AD resultl from areport indicating that a Karon-lined bushing POllT,~GSYMBOl with the liner broken into five PiJces was found during a scheduled inspection of the INITIACSISIG HSTA components; the broken liher had worn and disbonded from the bushing. We are DAlE proposing this AD to detect and donect discrepancies of the HST A attachment locations, ROllTlNGSYMFlOL which could result in reduced strJctural integrity of the horizontal stabilizer and 'MTIAlSlSlG consequent loss of controllability of the airplane. DATES: We must receive comm1ents on this proposed AD by [INSERT DATE 45 DAYS AFTER DATE OF PUBLtCATION IN THE FEDERAL REGISTER]. ADDRESSES: You may send corments by any of the following methods:

• Federal eRulemaking Portal: Go to http://www.regulatiol1s,gov. Follow the [lATE
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ATE14910-13-Pj

DEPARTMENT OF TRANSpdRTA T10N Federal Aviation Administratiorl 14 CFR Part 39 /Docket No. FAA-2010-++++; Directorate Identificr 201O-NM-128-AD] RlN 2120-AA64 Ainvorthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -30GERSeries Airplanes AGENCY: Federal Aviation Adjlinistration (FAA), DOT. ACTION: Notice ofproposed ruJemaking (NPRM). 

# I ONCURRE'lCES ROUnNG SV"'B01. IoN!>\.. 1iL/ ;"mAl5J'SIG 

## D.WilsoY[ 

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# 'I'I'D OUTING SYMBOL 

### /' m IG

AT~ 7-7-ZoI0 SUMMARY: We propose to adopt anew airworthiness directive (AD) for certain Mod



# . I 777-200, -200LR, -300, and -300iR series airplanes. This proposed AD would require a DATe detailed inspection and measurement ofthe Karon-lined bushings ofthejackscrew fittinl i"9~ 0 ofthehorizontal stabilizer trim actuator (HSTA) and related investigative/corrective actions ifnecessary. This 

### proposL AD results from areport ~I'l~a Karon-line bushing with the liner broken inth five piece~\was tound during ascheduled inspection thehorizontal stabilizer trim actuator (HSTA) components; the broken liner had worn disbonded from the bushing. We are proposing this AD to detect and correct discrepancies ofthe HSTA attachment locations, which could result inreduced structur integrity ofthehorizontal stabilizer and consequent loss ofcontrollability ofthe airplan . -



# I I NlnAlS,ISI(; DATES: We must receive comments onthis proposed AD by [INSERT DATE 45 I



# I ~ DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADDRESSES: You may send crmrnents by any ofthe following methods:

• Federal eRulemaking ,ortal: Goto http://WWW'.reg~lations.gov. Follow the instructions for submitting comments. O\1T1HG SYHaOL • Fax: 202-493-2251. 'NIl1ALSISIG[4910-I3-P]

DEPARTMENT OF TRANSPORT AnON Federal Aviation Administration :OtlCll~RE"CES OlJnNG 5\'M8Q1 14CFR Part 39 IDocke! No. FAA-2010-++++; Directorate Identifier 201O-NM-128-AD] IUN 2120-AA64 Ainvortbincss Directives; The Boeing Company Model 777-200, -200LR, -300, and

-30GERSeries Airplanes AGENCY: Federal Aviation Administration (FAA), DOT. 

### MJ"'-I iLl FNlllALSISlG 

## D.Wi/so,! lATE 7/7

# I'D

. OUTlttG$Yt<~0l

7-"1-Zo10 ACTION: Notice ofproposed rulemaking (NPRM). OIInNGSYM6CXSUMMARY: Wepropose to adbpt anew airworthiness directive (AD) for certain Mod NI1~MlS/SIG

. I ~ " 777-200, -200LR, -300, and -30GER series airplanes. This proposed AD would require a OA ( _1i::-kV 

### P (0 detailed inspection and measurement ofthe Karon-lined bushings ofthejackscrew fittin ofthehorizontal stabilizer trim actuator (HSTA) and related investi~ative/corrective actions ifnecessary. This proposed AD results from areport mmestiAgahat aKaron-lin bushing with the liner broken into five piec~SAw(1:) found during a scheduled inspection thehorizontal stabilizer trim actuator (HST A) components; the broken liner had worn dIsbanded from the bushing.

# wJ are proposing this AD todetect and correct discrepancies ofthe HSTA attadhment locations, which could result inreduced structUT


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O\fTING S~"'I>OL NlTI,o.lS/SIG
.n • Fax: 202-493-2251. DATES: We must receive comments onthis proposed AD by [INSERT DATE 45 integrity ofthe horizontal stabilizer and consequent loss ofcontrollability ofthe airplan 

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• Federal eRulemaking Portal: Go tohttp://wvvw.regHlations.gov. Follow the

. ., b" I . Instructions lor su mlttmg comments. ' I DAYS AFTER DATE OF PUBLICATION INTHE FEDERAL REGISTER]. ADORESSES: You may send comments byany ofthe following methods: