Airworthiness Directives for CESSNA 150 G5

1384 end WI-1390 through TH-1395. 58P. SRPA TI-3 through Tj-435. and Ti-437 hmugh TI-443. 5BTC 58TCA ........-.......TK-1 Ulrough TK- 150. Certification Office. &upulsion Broach. ANM-140s: telephone (208) 2n-2683. Mailing address: FAA. Northwest Mountain Region. Transport Airplane Directorate. 1Rm Llnd Avenue SW.. Renton Washington 91X)SE-40%3. SUPPLEYENTARV INFORMATIOK O n August 23,1901. the FAA issued t e l e w p h i c ADT91-16-51. to require deactivetion of the thmst reverser systems of Model 787 airplanes equipped with Pratt a n d Whitney PW.)WOseries engines. That action w a s prompted by the possibility that Compliance: Required the next time the elevator trim tab actuators are removed lor any mason, but no later than 12 ca!endor Fderal Register / Vol. 56. No. 208 / T h u r s d a y , O c t o b e r 24. 1991 1 Rules a n d R e g u l a t i o n s 55067 contamination of the hgdraolic directional contml valve could result in the tlncommanded deployment of o thrust revener. An uncommanded deployment of a thrust reverser during night couid result in reduced controllability of the airplane. While deactivation of thrust rerreTsers eliminates the potential for uncommanded deployment, it also has Ihe undesirable effect of eliminating the margin of safety provided by them during takeoff a n d landing, particularly on wet or cnntaminated runwavs. Since issuance of that^^. ~ & i n , gh a s developed, and the PAP. has approved, a modification of the thrust r e r i r s e r control system that eliminates the vulnerability of the oriainal system to contamination. a n d further enhances the level of safety of the tlvust reverser system. The modification invoives: (1) installation of an independent stow and r e s t o a fiystem of the thrust reverser hvdraultc cystem. ( 2 ) atld'tton I:! nn ud~i:tions!! I ~ O T ~ U I I C isoja:13r I . R ! Y C . e n d 13' r n o c i l ~ r u t ~ ~ n of the elvcl?tr:,l cnntrn. system to make it less susceptible to electrical shorts induced by ir.ire bundie chafing. The FAA h a s rel~iewedand approved B o e i n ~Service Bulletin 767-78-0051, dated October 9. 1991, w!iich describes the procedures ior accor.plishin:: :he modriication descrihed t t t . o v ~ Slncc this conchtton IS t~ht::! In rxis! or develop on other airplanesof the s a m e type design. this AD supersedes telegraphic AD T91-1M1 to require modification end reactivation of the thrust r z v e n e r svstem, in accor~lance with the service bulietin previously dcscribed, Thls is considered an interim action until final action is identitiec. a t whicl! tfme Itre F M may consider further nilema1:ing. Since a siiuation exists that reauires procedure hcreon are imprsctlcabie. and good cause exists for making this amendmenl efiective in less than 30 rinos.- 'The regulatiuns adopted herein will not have subntantial direct effects oil the States, on the relationship between the national government a n d the States, or on the diiuibution of pourer a n d resnonsibilities among the various levels of p o r e r r n c z l Thcre!tlrr. tr ;iccordznrr. w,nh C;:ecut~vs Order 12C.12, i t :s d c t ~ r n ~ n e t l that 11.1s l,nnl ntil. coas no1 hnv~:suff>rient federaltsm ~ m p lr:atl,ms to warrunt the prrparhtltlrl o r ;I I:edsrniism Assessrncnt Ti:? FAA iws drlermtnt[l :Ira' t!.ls regulation is a n emergency regulation and that it is not considered to be major under Executive Order 12291.It is ~ ~~ impracticable for the agency to follow the procedures of Executive Order 12201 with resilect to this rule since the rule must beissued immediately to correct ar! unsafe condition in aircraft. I! h a s been determined further that this action involve8 an emergency regulation under DOT Re:ulatory Policies a n d Procedures (44F'R 1103E.February 26.1979) If i! is cielermined that this emergency r e ~ u l a t i o notherwise w ~ u l dbe significant under DOT Regulatory Policics and Procedures, a final regulatory evaluation will b e prepared a n d placed in the Rules Docket I r t h ~ r w i s ~ , an ~ r i j l u a t i o nis no: rr.q~ltred:. A cnpv of ;'. i i filed. mo! t ~ r o!,:tiined i r o n the Rules Docket List of S~thjectsin 14 CFR Part 39 Air transportation. Aircraft. Aviation safetv. Incorporation bv reference. safe&. Adoption of the Amandmsnl Accordingly. pursuant lo the authority delegated lo me by the Administrator. t!le Federal Aviation Administration amends 14 CFR part 39 of the Federai Aviation Regulations a s follows: PART 35-4AMENDEDl 1. T h e authority citation fur part 39 continues to read HS follows: Authority: 4Y U.S.C. 1354la). 1421 and 147.3 49 G.S.C. IOGfg):and 13 CFR 1:.89. Ii 39.13 IAnrmdedI 2. Section 39.13 is amended by adding the follou.inp new ainvorthiness directive: QI-zZ49 Hoeing: Amendment 394Ofi9~ Docket No. 91-NM-213-AD. Sopersedes leieg~aphi::AD T91-I Wl, isaued Augus! 23.1%11. Applicobli!l,~:Model 7R7 series airpiancs equipped with Pratt and Whitneg PW4MO serer mgiaas, iis!ed m B0eir.p Sexice H>illetin71,:-iB-005:. dated October Y . 1991. r:ortificated in any category C;ot,piionc Required as indicated. unless previousi,~scmmp!ished. To prevent patential in-flight thrust reverser denlovment. accompiivh the ." .........* (a) M':t!: ;i 7 davs after the rrf:ebltt of t~:.rgmp'~eAI)Tq-I&-:,!, ~ C F I : P ~AI.SL:S:*:I. 1w:. R C ~ . U ~ P I I S ~ t!te luliow~ng I : \ l:t:~.~.ttrnlebo* left end rlchl tbnls! revcieen in acoordice G t h ~ & i o n 78-33-1 or Boeinp, Document lX30T002 "Boeing 707 Disnatch Ueriation Guide." Revision 9, dated ~ a ; .1.1991, (a]Add the following to the Limi!at>ons Section of he FAA-sppmved Airplane Fiifiht Manual (AW]. nlis mny he actr~mplishedby n b r i n o a roor of this AD in the AFM. , - . ~ - Rrducs h\ live pew?*: tn? R Y R _ ~ H \ > L P acc:~~~cmrc.slop dtrlance rrauittn~from t i c A 4 vH Y P l'l:phI Man, ill lak~c!' IIVT~UITIIUIII:P nnalys~swhen the runwny is wct or contaminated. (11)Witbin 00 days after the efiective date of this ilmcndment, modify the thrust rcvsrst!l. ayetem in accordance wili, Boeing Service Bulletin 767-7HmS1. dated October 9. 1991. i Once lhi5 modilicution is accomplished, the thrust reverser system mnst be rc-activated. and the AFM limitation required by pnraarn~hiaIi2i of this AD may he removed. . . g:' 4" 8ltcinoll:i method of compl,anr:c o i al!luslrncr' o! :i.i. cnmpl ;inre t!mr which ~rovior:sr n hrr.rptanle l?vel of snfctv X O Y he used vP1ienapproved by the Manager. Seattle Aircraft Certification Office [ACOI. FAA. Transport Airplane Directorate. Note: T h e request should be forwarded through an 1:P.P. Principsl Mslnttrnunce Inspector, who may concur or copmenl end then send it lo the Manager. Seattle ACO. (dl Special flight permits may be isnued in accordance with FAR 21.197 and 2l.lW lo operate airplanes i n s base in order to comolv with t h ~reauinments of this AD. . . ( P I Tbr m t r d r l ~ c ~ * ~ ~ . n requtrernant shell be done 3 1 , iuccordance w:~kBoelq 5ewce Dut~ct,r.?B--:WSl d a s d Ortober 9 t s l l . The desctivatiun requirement shall be done in accordance with Boeing Documenl D ~ O O Z ."noeing 767 Dispatch DeviaUon Guide," Rurision L). Sectioc 7G31-1. dated EAsy 3.1991. wbicll includes the follnwin~list or effective pages. Page No Dale 2-79-31-1.0 .......................... h1ay 1. 1R01. 2-78-31-1.1 .......................... Au0,usl 15. 1WQ. 2-78-31-1.2. 2-7M1-1.9. 2-ie-31-1.4, 2-7&31-l.fi 2-70-31-1.5 june 29. 1Dm. ............... 2-7R-31-1.7 ...... December 14. 2-7C-31-1.8, 1BD. 2-7R-31-1.9. Thw inalrporatim by rrference was approved by the Director nl the Federill Register in accordance with 5 11.S.C.552lsl and 1 CFR pnrl sl. Copies may bc obtained from Hoeinp. Commercial Airplane Group. P.O. BOX370?,Sealtlt. Washington 98124. Copies may be inspected at the FAA. Northwest Mountain Region. Transport Airplane Directorate. 1601 Lind Avenue SW.. Renton. Washington, or st the Oiiice of tlle Federal Registe;. 1100 LSrreet NW.. roonl 8401. Washington. DC. This amendment supersedes AD T91-18-51, issued Au~ast23.1831. This smendmnl (39-806(1. AD 91-2241 becomes efkctiue Novemher 8.1991. Issued in Renton, Washingtan. on October 11.19rn. Damell M.Pedrrson. nct,n,- Monopei. Tronrpon Alrplono Direcromte. Aircmfl Cerlifimtion Service. [FR Doc. 01-2558; Filed 1&?3-91: R:4S urn1 81LUNG W E 4810-13-U