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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39 e./?J1JO

[Docket No. FAA-2010-1 I I I I; Directorate Identifier 2009-NM-009-AD)

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Ainvorthiness Directives; The Cessna Aircraft Company Model 750 Airplanes /I-dhNu-

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AGENCY: Federal Aviation Administration (FAA), Department of Transportation 3>/2-q It i)

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ACTION: Notice of proposed rulemaking (NPRM). 17!,~

SUMMARY: The FAA proposes to supersede an existing airworthiness directive (AD) 'Olb~;;0

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that applies to all Model 750 airplanes. The existing AD cwrently requires inspecting the -AN M-l{)b

inboard-hinge brackets of the left and right elevators for cracking and doing related TI. 'OlG k

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investigative and corrective actions if necessary. For certain airplanes, this proposed AD 1-. /

would require inspecting for cracks and corrosion of the bracket of the inboard horizontal

stabilizer and measuring the lug thickness of the horizontal stabilizer hinges~ doing

corrective actions if necessary; modifying the left and right elevators and left and right

horizontal stabilizer. For all airplanes, this proposed AD would require replacing the

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existing elevator assemblies with new elevator assemblies, which would terminate the

requirements ofthe existing AD. This proposed AD would also revise the applicability ten:

remove certain airplanes. This proposed AD results from a report of cracking and

corrosion found on the elevator inboard-hinge brackets and the horizontal stabilizer

hinges. We are issuing this AD to prevent such cracking and corrosion of the elevator ,TE

inboard-hinge brackets and the horizontal stabilizer hinges, which could result in

structural failure of the elevators and consequent loss of control of the airplane.

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

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

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fDocket NQ. FAA-iPP9-1 I I II;'Diiedorai~Identifier 2009"~1\1~009-~1

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this ~JOpos.cd AD ~9ulprequir; rifPlacfQgthe existing elbr~or assemblies -,Vith ne\\'

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DEPARTMENT OFTRANSPOJqATlON

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d61Qg)'~lateirlnvestl.gative and corrective'actionsifnecess~. Eol.c_et:t~~lanis.

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ProROseoAD·w~~~,~.;~cq~ire{jhs,p':.!,i~g ~qr,1f~f~~::~.Pqorrg$ioJ1;9t~r;inbp_ardhQ?'zon

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sta:'pjl1?Sr"higgebt~~~isaf!<ilne~liIW:g th.e1ug~iCl51e&s'f.9fthelioftwi1tal Stabilizer

hmgebrack~; coft&tive ~ttiortS';ifnecessaiy;_m~n;-~e leti'-:~1ighthprizo.~tO:;l

'"sta~'Hizer;antiTepla~ingth~~!,i,~~ing~levat;~s~bliC$-~l~--ncw~1~af9r~~~"qnin,~;

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1 <,,"-= ..•.... ."",~,;'; .~ ij ~~. .' ,'~ .j, "."'7'+'f' """:.-' ';::;:,~~

which would. ttmriin.aic fhe',rpq'uireJjrent.sof:the,exi~ting,AB'_. Eo-C:cenain other airkli¥1"

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;:'~'sm1MAR¥: The F:M pt:.6poses tosupers~can~x'is_t.i.Qgairwortbiness-rlu:ective (..

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il:i'~tapplies.J::o all' Ge"ssna Model 750 airplan~.The existf-igAD cii.en!!y-,~equj:(~s

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> _ i'nsp~ting the inboard:nin~e bracl(e~ofthele.ftand,right elevators for-craCKing ail.d

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,t_, Ainvorth!n~s.Du::eciiyes,; €essna.,ModeI15Q Airplanes

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AD results,from a reporto.-feracking_and ~j{6~io~~~:lUnaonthe el~Vator:inboard-hjpg •.r,;,-H<:&1~~..

biiick-ets and,the hori¥lQ~al Stab'ilizJr-hinge grackets._ We <l!~ASsti'iilg-thisAD to preven

s~cgcra<:~$:AA?"~9Sibq~Vihf~-~~&UJ(trc$fil;~i~':s;ructUral~,~~ilUte o~th;~evatorsaU

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oonsequerlt loss,of ~_ntroI of'the akplane., S'

FAA Form 1360-14.1 (6-.89) OFFI@JAlflLEG9py