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DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 

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

## ,,~ OUTING SYMBOL 

## ANM-] lITIMS/5IG 

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xmNGSYMBOl R1N 212o-AA64 

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# tt -'" Ainvorthiness Directives; The Cessna Aircraft Company Model 750 Airplanes 

# /I-dhNu- ,Tf. AGENCY: Federal Aviation Administration (FAA), Department of Transportation 

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# It i) 'UTI»G SYMBOL (DOT). 

## WM-(a\ ACTION: Notice ofproposed rulemaking (NPRM). 

# 17!,~ SUMMARY: The FAA proposes to supersede an existing airworthiness directive (AD) 

# 'Olb~;; 0 W~~ that applies to all Model 750 airplanes. The existing AD cwrently requires inspecting the

# -ANM-l{)b inboard-hinge brackets ofthe left and right elevators for cracking and doing related TI. 'OlG 

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, investigative and corrective actions ifnecessary. 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 ofthe horizontal stabilizer hinges~ doing corrective actions ifnecessary; modifying the left and right elevators and left and right horizontal stabilizer. For all airplanes, this proposed AD would require replacing the TI.u.&'SIG 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 areport 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 ofthe airplane. DATES: We must receive comments on this proposed AD by [INSERT DATE 4S DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. HJ'HNG SYMBOlfIOtjTlN1i""'~~':'" ~ "'k'" '.' 

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, I h' "'<":.;'I:'y:,>[O,;," ACfJON: 'Noti~-~fproPosed

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

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this ~JOpos.cdAD ~9ulp requir; rifPlacfQgthe existing elbr~or assemblies -,Vithne\\' >--"- - "_. 149fO-IJ-U) DEPARTMENT OFTRANSPOJqATlON 'Feder~1 Ayi~tion

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

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AD·w~~~,~.;~cq~ire{jhs,p':.!,i~g 

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qorrg$ioJ1;9t~r;inbp_ardhQ?'zon ,-- , ' ",:-:-':", , ">:"':'51:1 ~ " 'At',::::,' ", ", "'~::--';:;;"', '::"::";::"~:':

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bt~~~is 

### af!<ilne~liIW:g th.e1ug~iCl51e&s'f.9fthelioftwi1tal Stabilizer hmgebrack~; coft&tive~ttiortS';ifnecessaiy;_m~n;-~e leti'-:~1ighthprizo.~tO:;l


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~levat; 

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# -~l~--ncw~1~af9r~~~"qnin,~; 1 1 <,,"-= ..•.... ."",~,;'; .~ij ~~. .' ,'~ .j, "."'7'+'f' """:.-' ';::;:,~~ which would. ttmriin.aic fhe',rpq'uireJjrent.sof:the,exi~ting,AB'_. Eo-C: cenain other airkli¥1" ,- ~' ;:'~'sm1MAR¥: The F:M pt:.6poses tosupers~c an~x'is_t.i.Qg

airwortbiness-rlu:ective (..

-- . ~ - . '. -~:i"'" '-c-o' • il:i'~t applies.J::o all'Ge"ssnaModel 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

-'.'-- ·~" I "'.,,"' 1, ,,' " ' ,t_, Ainvorth!n~s.Du::eciiyes,; €essna.,ModeI15Q Airplanes

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

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

## AD to preven 

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### Vihf~-~~&UJ(trc$fil;~i~':s;ructUral~,~~ilUte o~th;~evators

aU C','''''''' "" ',,, ,::',<',' ,1 oonsequerlt loss,of ~_ntroI of'the akplane., S'

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