# 9 ANA C JEPARTMEN TO F .i^HSPORWlO N • :^KE i OPERATION S n n OC T' U P ! • 3 8 Sa o Jos 6 do s Campos , 2 2 September 201 0 Agerici a Naciona l d e Aviaga o Civi l Of . 1296/2010/GGCP/SAR-ANAC U.S . Department

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mP L40 1 Washington , D C 20591-000 1 US A Subject : EMB-135B J - FAAValidatio n

Embraer' s Petitio nt o amen dth e exemptio ngrante db y FAAexemptio nn ° 7933 . Ref. : 1 . Embrae r Lette r GCF-0818/2010-1/5 , datedJuly 26,2010 . 2 . FA Aexemptio nn ° 793 3 Enclosure : Embrae

r Lette r GCF-1002/2010-1/5 , datedAugus t 20 , 2010 . Dea r Sir , 1 . ANAC ha s beenrequeste dt o sen dt o th e FA

Ath e enclose ddocument relate dt o th e Embraer' s petitio nto amendth e exemptio ngrante db y th e referredFA

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mth e requirement o f 1 4 CF RPar t 25.901(c) , fo

r th e EMB-135B J (Legacy Enhanced) equippe dwit hth e AE3007A 2 engines . 2 . Th e Embrae r letter attache dcancel s th e letter referredabove . 3 . Mrs . Rafael aPatt i Caillaux i s th e project

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U.S . Departmen t Transportatio n Docke t Managemen t Syste m 40 0 7t h Street , SW , Roo m P L 40 1 Washington , D C 20591-0001 . US A Subject : EMB-135B J - FAAValidatio n

Embrae rPetitio n t o amen d th e exemptio n grante d b ydocumen t (FAA Exemptio n no . 7933) , fro m th e requiremen t o f14CF R §25.90 1 (c) , fo rth e EMB-135B J (Legac yEnhanced ) equippe d wit h th e AE3007A 2 engines . Gentlemen : Thi s lette rcancel s th e lette rGCF-0818/2010 . Pleas e fin d enclose d Embraer' s petitio n t o amen d th e exemptio n grante d b ydocumen t (FAAExemptio n no . 7933) , fro m th e requiremen t o f14CF R §25.90 1 (c) , fo rth e EMB 135B J (Legac yEnhanced ) equippe d wit h th e AE3007A 2 engines .

Bes t Regards , 

## ^^i^^a^a/6cuc i Ricard o Lava U HoUerbtu ^

I Certificatio n Offic e I 'Sergi o August o Vian a d e Can/alh o I Airworthines s Manageri C.c : FAA - Mr . Sanja yRalha n - Progra m Manager - EMB-135B J ANA C - Mrs . Rafael a P . Caillau x- Progra m Manage r- EMB-135B JGCF-1002/2010-2/5 

## ^ EMBRAE R

i

Petitio n t o amen d th e exemptio n grante d b ydocumen t (FA AExemptio n no . 7933 ) Summary Petitioner : EMBRAE R Empres a Brasileir a d e Aeronautic a S/ A

Section s o fth e Regulatio n Affected : 14CF R §25.90 1 (c ) Amendment s 25- 1 throug h 25 - 84 , an d additiona l requirement s a s pe rI P G- 1 originate d fro m th e significan t majo r modificatio n presente d i n th e DC A0145-000-00020-200 8 "EMB-135B J Performanc e Enhancements" . Descriptio n o fRelie fSought : Exemptio n o fEMBRAE R EM B 13 5 B J Aircraf t fro m th e n o singl e failur e requirement s o f14CF R §25.90 1 (c ) a s i t relate s t o uncontrollabl e hig h thrus t failur e conditions .GCF-1002/2010-3/ 5 

## ^ EMBRAE R

Embrae rrespectfull ysubmit s th e enclose d Petitio n fo ra n exemptio n fo rth e EMB-135B J mode l wit h th e modification s presente d i n th e DC A0145-000-00020-2008/FAA , herei n calle d EMB-135B J Enhanced , fro m th e n o singl e failur e requirement s o f14CF R §25.90 1 (c ) a s i t relate s t o uncontrollabl e hig h thrus t failur e conditions . Embrae rpropose s t o amen d th e FAAExemptio n no . 793 3 grante d t o EMB-135B J equippe d wit h engin e AE3007A1 E fro m requiremen t 14CF R §25.90 1 (c ) fo rth e EMB 135B J Enhance d equippe d wit h th e AE3007A 2 engine . TEX TO F REQUIREMEN TFO R WHIC H EXEMPTIO N I S SOUGH T 1 4 CF R §25.90 1 (c ) "Installation " (c ) Fo reac h powerplan t an d auxiliarypowe runi t installation , i t mus t b e establishe d tha t n o singl e failur e o rmalfunctio n o rprobabl e combinatio n o ffailure s wil l jeopardiz e th e saf e operatio n o fth e airplan e excep t tha t th e failur e o fstructura l element s nee d no t b e considere d i fth e probabilit yo fsuc h failur e i s extremel yremote . GROUND S SUPPORTIN G EXEMPTIO N Th e EMB-145X R an d EMB-135BJ , previou s model s o fth e LegacyEnhanced , hav e receive d partia l exemptio n o fcomplianc e wit h th e requiremen t sinc e ther e wer e thre e scenarios , al l o fthe m o n ground , no t successfull ydemonstrate d t o b e entirel yi n accordanc e wit h th e requirement . FAAhav e grante d exemptio n t o thes e model s throug h Exemption s No . 7908 (Octobe r21 , 2001 , fo rEMB-145XR ) an d No . 793 3 (Decembe r12 , 200 1 fo rEMB-135BJ) . Th e EMB-135B J Enhance d i s equippe d wit h Rolls-Royc e AE3007A 2 engines , a modificatio n ove rth e previou s engin e model , th e AE3007A1E . Thi s engin e modificatio n consist s o fa ne wfa n modul e wit h fewe rfa n blade s (2 2 instea d o f 2 4 o n A1E ) an d ne w spinne ramon g othe rcomponent s o ffa n module . Pleas e se e th e figur e belo wwit h th e mai n difference s fro m A1 E an d A 2 engines . A1 E part s ar e represente d i n gree n an d A 2 one s i n blue .GCF-1002/2010-4/5 

## ^ EMBFIAE R

Al l th e res t o fth e engin e i s maintaine d th e sam e a s th e A1 E engine , includin g compressor , combustio n chamber , turbines , exhaust , FPM U (Fue l Pum p an d Meterin g Unit ) & FADE C hardware . FADE C softwar e i s bein g update d t o receiv e A 2 thrus t table s amon g othe rmodifications/improvements . Th e AE3007A 2 engin e Ma xT O (Tak e Off ) thrus t (902 2 Ibf ) ha s increase d abou t 14% , comparin g t o th e AE3007A1 E (797 4 Ibf ) engin e currentl yuse d o n EMB-135BJ , bu t th e maximu m pea k

thrus t durin g a MM V (Mai n Meterin g Valve ) positio n failur e (full yopen ) i n th e AE3007A 2 i s 10,50 1 Ibf , agains t th e 10,15 0 Ibf . Aircraf t handlin g qualitie s analysi s fo rth e Uncontrollabl e Hig h Thrus t (UHT ) scenario s (MM V full yopen) , fo rth e EMB-135B J wit h AE3007A 2 engine s showe d tha t wit h th e additiona l thrus t increas e (3.5%) , th e result s ar e simila rt o th e one s obtaine d wit h AE3007A1 E engines . Smal l difference s wer e foun d betwee n th e require d fligh t contro l surface s deflection s fo rth e EMB-135B J (Legac y600 ) an d EMB-135B J Enhance d (Legac y650 ) (les s tha n 1 degree ) an d th e deflection s ar e fa rfro m an ydetent . Therefore , al l UH Tanalysi s result s fro m th e EMB-135B J wit h AE3007A1 E engine s ar e applicabl e t o th e EMB-135B J wit h AE3007A 2 engines .GCF-1002/2010-5/ 5 

## - ^ EMBRAE R

Th e UH Tprotectio n logi can d correction s implemente d i n th e EMB-14 5 famil yFADE C sinc e firs t certificatio n hav e show n positiv e result s wit h almos t 1 3 millio n fligh t hour s accumulate d wit h n o safet yissue s sinc e th e las t UH Teven t i n 2003 . AE3007A 2 FADE C i s inheritin g al l EMB-14 5 famil yFADE C improvement s an d correction s implemente d durin g it s history . Durin g a meetin g hel d durin g Ma y201 0 a t FAAfacilitie s i n Seattl e wit h FAA , Embrae r an d Roll s Royc e i t wa s discusse d tha t th e existin g exemptio n shoul d b e amende d an d sta yvali d fo ra perio d o ffou ryear s afte rFAAvalidation . Durin g thi s period , Embrae r an d Rolls-Royc e wil l develo p an d mak e availabl e improve d UH Tlogi cwhic h wil l shutdow n engine s o n th e groun d onl yupo n detectin g hig h N 1 an d wit h a TL Acomman d a t o rles s tha n idle. Thi s improve d UH Tlogi ci s th e onl yknow n practica l actio n (cos t beneficia l an d technologicall yfeasible ) t o addres s th e scenario s exempte d b yth e memo , i n orde rt o minimiz e th e advers e effect s o n safet yassociate d wit h grantin g exemptio n fro m 14CF R §25.90 1 (c ) fo rth e EMB-135B J Equippe d wit h A E 3007A 2 engines . N o late rtha n fou ryear s fro m th e grantin g o fAmendmen t At o thi s Exemptio n (i.e . Exemptio n # 7933A) , fo ral l airplane s EMB-135B J t o whic h thi s exemptio n applies , Embrae rmust : (a ) obtai n FAAapprova l o famende d typ e design s incorporatin g thrus t malfunctio n detectio n an d accommodatio n logi ctha t protect s agains t al l noncomplian t uncontrollabl e hig h thrus t failure s o n ground , excep t fo rthos e du e t o failure s withi n th e airplan e throttl e system ; (b ) assur e al l ne wEMB-135B J mode l productio n airplane s ar e equippe d wit h th e amende d typ e design s o fite m (a ) o rsubsequentl yapprove d thrus t malfunctio n accommodatio n logic ; an d (c ) obtai n FAAapprova l o fservic e instructio n t o facilitat e retrofi t o fal l existin g EMB 135B J mode l airplane s wit h th e amende d typ e design s o fite m (a ) and/o ran y subsequentl yapprove d thrus t malfunctio n accommodatio n logic . Base d o n th e abov e consideration s Embrae rrespectfull ypropose s t o amen d th e exemptio n grante d b ydocumen t (FA AExemptio n no . 7933) , fro m th e requiremen t o f 14CF R §25.901(0) , fo rth e EMB-13 5 B J (Legac yEnhanced ) equippe d wit h th e AE3007A 2 engines .