Gerar dWassell e 202 0 Abbot t R D ST E 5 , Anchorage , Alask a9950 7 (907 ) 223-101 2 Fa x (907 ) 344-442 6 

## ^CFARTMENTO F March14,201 1 SANSPORWiO N 

## " \ . : m QPER/VTION S Docke t Managemen

t Facilit y U S Departmen

t o f Transportatio n ?0*i l HA R2 5 ~- ^ \2 - S ^ 120 0 Wes t Ne w Jersey Avenue , S E Wes t Building GroundFloor Roo mW12-14 0 Washington , D C 2059 0 RE : Petitio n fo

r Exemption

/ Rulonaldn g Airwordiioes s Directives : Eclips e Aerospace , Inc . Mode l EA500 Airplane s Equippe dWit haPrat t andWhitne

y Canada , Corp . PW610F- A Engine (Documen

t I D FAA-2011-0199-0001 ) Dea r Sir : Aircraf t N778V Wflies regularly between F LandA K vi aCanada . Due t o th e lack o f airport s within Canad aandAlaskawit hsufficien t runwa y length , restrictin g m

y fligh t t o belo w 30,000 ft create s afiiel managemen

t problem . I n th e 520 hour s thi s aircraf

t ha s been flown (man

y abov e 34,00 0 ft), I hav e neve r experiencedan

y engine surg e o r

popping . Due t o rapidly changing weathe r i n thes e region s andcommon ATC routing , fiiel managemen t become s increasingly importan t andthi s restrictio n to unde

r 30,00 0 ft increase s ftiel consumptio n markedly reducin g th e rang e fo r alternat e airport s a s weathe

r changes . I a mrequesting flight

level s up t o 37,00 0 fee

t unde r th e origina

l A D o f 2008. 1 hav e followedth e guideline s pu t fort hby Eclips e Aviatio n a s well a s Prat t Whitney : CPC NO . 500-2008-012A . Andmor

e recently th e guideline s set i n apilo t communique ' datedMarch9 , 2011 . O f 28,00 0 documoite dflij^its by dii s aircraf t type , I hav e hear

do f only 5 engine surging incident s tha

t hav e occurred . Th^ e i s no wa y t o tel l i f dios e aimaf

t wa c following the guideline s set

fort hby Eclips e Aviatio n andPrat t Whitney . I believ e i t

i s th e FAA' s inten

t to increas e th e safet

y o f eac hflight; however , thi s directiv e decrease s th e safet y o f lon g rang e flight keeping alternat

e airport s i n mind . I hav e notifiedth e Anchorag e FSDO , Stanle y Haine s (FAA) , wh o i s knowledgeable about th e Eclips e 500 and^prise dhi mo f ou r uniqu e situatio n andshoul dan y jHoblems aris e wit

h N778VW , I wouldcontac t

hi mimmediately . I appreciat e your time considerin g m

y request . Sincerely , Gerar dWasselleUpdat e o n Statu s of Returnin g th e Eclips e Aircraf t t o 41,00 0 ft . I n acontinue deffor

t t o kee p ou r

customer s infonne do n event s involvin g ou r great Eclips e Twi n Engin e Jet , w e woul d like t o take afew minute s t o updat e yo u o n som e progres s surroundin g th e effort s o f returning th e aircraf

t t o 41,00 0 feet . Firs t an dforemost , w e no w hav e asolutio n t o addres s th e carbo n buikl up sometime s produce di n th e P&W C 610- F engine . Thi s solutio n wil l result i n th e replacemen t

o f ane w combustio n line r

whic hPratt

Whitne y Canad ai s abou t t o release i n th e comin g few months . Thi s i s great new s an dw e appreciat e th e cooperativ e effort s o f bothteam s at

P&W C an dEAI , w e ar e collectivel y makin g thi s happen . However , late i n 2010 , five engin e surg e event s were reportedfromaircraf t alread y i n th e field . Pilot s reportedsome engin e "rumbliag " an d"popping " sound s followe db y engin e CA S messages . Inmiediately , P&W C vigwousl y investigate dth e event s i n conjunctio n wit hEclips e Aerospace . Th e investigatio n disclose dthat carbo n wa s foundt o buil du p o n th e combusto r line r i n an amoun t

sufficient t o caus e th e engin e t o surg e whe n descendin g finomaltitude . Carbo n i s [Roduce dwhe n unbume dfuel impinge s o n th e wal l o f th e liner . I t

can b e attribute dt o acombinatio n o f operatin g condition s an dengin e flo w rate s suc has : (H^ssure , altitud e temperature , ai r t o fiiel ratios , an dduratio n at a n altitude . P&WC' s investigatio n include daserie s o f componen t

test s i n facilitie s capabl e o f simulatin g awid e rang e o f operatin g condition s includii ^ aMbid e an dengin e flow rates . Th e tes t parameter s wer e calibnte dt o th e operatin g condition s whe n caibo n fonnatioo wa s repotte dt o hav e oocuned . Thi s testin g wa s abl e to vqxoduo e th e typ e <r f carbo n see n i n engine s i n th e fieldan dth e result s wer e instrumental i n detominin g th e ne w opaatin g envdopes . Th e en dresul t

o f thi s extensiv e testin g ha s resulte di n ane w combustio n line r desig n whic hw e anticipate dbecomin g availabl e i n Q 2 2011 . Thi s ne w desig n ha s several ne w features . Th e constructio n i s firomheavie r gaug e material wit

h replaceable , cas t

internal heat

shield s an di s designe dt o giv e bette r durability t o reduc e lon g termoperatin g costs . Th e new line r permit s th e us e o f

th e highe r

Meedsetting s at

al l operatin g altitude s an drestore s th e operatin g envelop e o f 41,00 0 fee t

originall y published . Fo r

owner s currenti y enrolled , ESP ® wil l cove r th e labo r an dmateria l cos t

o f replacin g th e combustio n liner . I f

yo u ar e no t

currenti y enrolle di n th e ES P Programyo u wil l b e permitte dt o enrol l throug hon e o f P&WC' s Commercial Program s whic hwil l b e mad e availabl e t o discoun t th e pric e o f

tl K engin e upgrade , protectin g th e operators ' lon g termoperatin g cost , yet recognizin g th e additional valu e o f th e ne w liner . In additio n t o providin g asolutio n t o remov e th e currm t 41 K A D bot hEA I an dP&W C hav e complete dextensiv e testin g t o determin e whedio ' th e curren t A D an doperatin g envekip e o f di e engin e shoul db e adjuste ddurin g th e interi mperio d befor e th e ne w combusto r

line r i s released. P&W C (th e Engin e Manufocture ) an dEclips e Aerospac e hav e worke d closel y wit

hTransport

Canad aan dth e FA A Engin e Certificatio n Offic e an dhav e formulate dan dsuggeste dasme s o f recommendations . Transport Canada , th e FA A Engin e Cotificatio n Office , P&W C an dEA I were al l i n agreemen t t o modif y th e curren t

AD . Thes e recommendation s were the n fwwarde dt o th e Sout hWes t Regio n FAA Aircraf

t Certificatio n Offic e for

review an dcomment . W e expec t that an y modificatio n o r

ne w A D addressin g di e interi m measure s wil l b e issue dfromth e S WAC O i n th e nex t few days . Th e join t

recommendatio n t o th e S WAC O is : P&W C alon g wit

hEclips e Aerospace , an dTransport Canad aar e currentl y recommendin g tht f th e curren t

operatin g envelop e o f

3 7 jOO O fee t b e maintamed , however , w e recommen dbasedo n actua l dat atha t pikt e o£EcC^w

e SO D aircraf t reduc e th e maximu moperatin g tim e a t cruis e whe n <qie[8tii ^ a t

altinwkr * betwee n 3 0 jW

O fee t an d3 7 /XX

) fee t to 8 5 minute s pe r

fl^fat. EA I an dP&W C hav e reviewedth e flight (Mx>file s o f th e curren t

fleet for th e pas t 1 8 month s an dare confident that thi s recommendatio n wil l hav e areliable impac t o n th e fleet

a s awhole , whil e significanti y improvin g th e safet y o f engin e operation , unt

U th e ne w line r

i s available . Bot

hcompanie s hav e conducte dextensiv e benc hri g an dactua l flight testin g o n th e curren t

engin e line r

an dAL Lth e dat agathere dsupport s thi s modificatio n to th e curren t 41 K AD . W e wil l continu e to kee p ou r customer s advise do f

al l development s a s the y occu r an dar e confiden t

tha t ane w combusto r

line r wil l b e availabl e i n th e \er y near ter mto remov e th e AD . I n additio n to thi s emai l ou r customer s can finda n update dFA Q sectio n o n our website . Simpl y logi n to th e Customer Page s / Owner s are ao f

th e Eclips e Aerospac e website an dloo k for th e A D announcemen t

t o se e th e FAQ . Sincerely , MasaHHoOan d Cbainna n /

CE O IECLDPS E Aeroipace , Inc . Phone : 843.971.502 5 maso n .holland<Seclipseaerospac e .netCP C No . 500-2008-012 A Engin e Sutg e Event s Octobe r10 , 200 8



## ECLIPS E AVIAnO N 

## Custome rPilo t Communicatio n CP C No . 500-2008-012 A 

### Re vADate : Octobe r10 , 200 8 Subject : 

## Engin e Surg e Event s Model : 

## EA50 0 EfTectlvlty : 

## Al l THI S I S NO T A N ECLIPS E AVIATIO N SERVIC E BULLETIN . 1 . PURPOSE : Thi s CP C i s issue d a s a revisio n t o CP C 500-2008-012 , Engin e Surg e Events , originall yissue d Augus t 18 , 2008 . I t i s intende d t o provid e update d informatio n o n finding s an d con-ectiv e action s implemente d b y Eclips e an d Prat t & Whitne yCanad a (P&WC) . Thi s CP C i s issue d b yEclips e Aviatio n t o provid e timel yaircraf t operationa l infomiatio n t o Eclips e aircraft operators . I t i s fo rinfonnationa l purpose s only , an d al l recommendation s ar e advisor yi n nature . 2 . SUMMARY : Thi s updat e t o CP C 500-2008-012 , Engin e Surg e Events , give s notic e o f a n AF M Temporar yRevisio n currentl yunde rrevie wb yth e FAAt o addres s engin e surg e event s cause d b ycartx) n deposit s an d provide s recommendation s o n ho wt o preven t excessiv e carbo n formation . T o date , ther e hav e t>ee n n o furthe rreporte d engin e surg e event s bieyon d th e origina l fiv e aircraf t reporte d i n th e origina l CPC . 3 . BACKGROUND : Eclips e ha s receive d report s fro m operator s o f instance s o f engin e surge s (rapi d airflo wreversal s i n th e compressor , sometime s referre d t o a s compresso rstalls) . Thu s far , engin e surge s hav e occurre d o n si x engines , affectin g fiv e differen t aircraft , an d non e hav e occurre d sinc e th e origina l publicatio n o f thi s CP C i n August , 2008 . Finding s indicat e cartw n deposit s tha t for m i n th e combusto rduring hig h attitiid e operatio n (greate rtha n FL370) , wit h hig h engin e blee d flo woperating , ca n detac h an d trave l downstream . Th e detache d cartx> n deposits , I n som e instances , becom e lodge d i n t)etwee n th e Hig h Pressur e Turbin e vanes , whic h reduce s th e flo warea , thereb yresultin g i n a n engin e surge . O f th e engin e surg e occurrence s reported , fiv e occurre d i n fligh t an d on e occurre d o n th e ground . Non e o f th e reporte d engin e surge s resulte d i n an ymechanica l damag e t o th e engine , no ri s i t anticipate d tha t thi s surgin g wil l caus e an ydamage . Som e instance s o f engin e surge s i n fligh t resulte d i n a n increas e i n engin e Inle t Turbin e Temperatur e (ITT ) grea t enoug h t o trigge ra L ENGIN E EXCEEDANC E o rR ENGIN E EXCEEDANC E CA S message . I n al l cases , th e surg e disappeare d afte rreductio n o f powe rt o idl e o n th e affecte d engine . 4 . ECLIPS E ACTION : Sinc e th e publicatio n o f CP C 500-2008-012 , Eclips e Engineerin g ha s worite d wit h P&W C t o conduc t extensiv e fligh t testing . Th e goa l o f thi s testin g wa s t o full ycharacteriz e th e operatin g condition s promotin g th e formatio n o f excessiv e carbo n deposit s an d validat e procedura l change s t o reduc e th e probabilit yo f engin e surg e event s cause d b ycarbo n deposits . 250 3 CLAR KCAR R LOO P S E ALBUQUERQUE , N M 8710 6 TE L 50 5 724-120 0 VWVW.ECLIPSEAVJATION.CO M 

### Page l of 2 CP C For m RevAOS/18/0 7CP C No . 500-2008-012 A Engin e Sutg e Event s 

### October 10 , 200 8 Fligh t tes t finding s sho wthat : Cartx> n deposit s larg e enoug h t o brea k fre e an d caus e engin e surge s ca n for m onl ydurin g sustaine d cruis e abov e FL37 0 wit h hig h engin e blee d operation .

- Cariso n deposit s o f al l size s wil l clea rdurin g operatio n a t takeof f thrus t fo r3 minute s o rgreater , eithe r o n th e groun d o rdurin g th e Initia l takeof f phase . Eclips e i s woridn g closel ywit h P&W C t o develo p an d tes t improvement s t o eliminat e thi s issue . P&W C provide d informatio n t o Eclips e fo rth e implementatio n o f a n AF M revision . Base d o n informatio n fro m P&W C an d ou row n testing , w e hav e submitte d a Temporar yRevisio n t o th e FA

Afo ral l EA50 0 Aircraf t Fligh t Manual s (AFMs) . T o preven t carix)n-relate d engin e surges . Eclips e develope d recommende d action s base d o n th e followin g determinations : 1 . Carbo n deposit s larg e enoug h t o caus e surgin g wil l no t for m i f th e cockpi t an d cabi n temperature s ar e se t a t o rbelo w68°F/21° C abov e FL350 . Regardles s o f actua l cockpi t an d cabi n temperature , settin g th e desire d temperatur e fo rbot h cockpi t an d cabi n a t o rbek> w 68°F/21'' C o n th e environmenta l synoptk ; pag e wil l preven t automati chig h engin e blee d fki wi n nonnir i operatkMis . i f hig h engin e blee d flo wi s require d fo rabnorma l situations , suc h a s los s o f on e blee d sourc e o r excessiv e pressurizatio n demands , th e syste m wil l stil l allo wthes e t o functio n automatically . Als o yo u maynot e tha t 68° F an d 2 1 ° C ar e no t exactl yequivalen t temperatures . Du e t o logi ci n th e Climat e Contro l system , thes e ar e th e temperature s tha t equat e t o th e hig h blee d cutof f point . 2 . An yresidua l carbo n deposit s fonme d durin g a fligh t abov e FL35 0 wil l b e cleare d i f takeof f thrus t i s maintaine d fo r3 minute s o n th e groun d o rdurin g takeof f o n th e subsequen t flight . Mino rcartx} n deposit s ma ystil l develo p durin g flights abov e FL350 , eve n wit h lo wengin e blee d operatton , s o thi s procedur e wil l ensur e an yresidua l cartx) n deposit s ar e burne d of f wit h hig h temperatur e an d wil l no t buil d u p ove rtime . Testin g show s tha t a 3 minut e takeof f powe rru n o n th e groun d wil l als o clea r an ydeposits . 5 . RECOMMENDE D OPERATO R ACTION : Unti l a n AF M Temporar

yRevisio n i s approve d b yth e FA Aan d distribute d t o you , Eclips e recommend s tha t pilot s us e th e followin g procedure s t o reduc e th e potentia l fo rengin e cart)o n fomiatk>n : 1 . Abov e FL350 , se t cockpi t an d cabi n temperatur e selectio n a t o rbek> w68°F/2 1 °C . 2 . I f previou s flight wa s abov e FL35 0 (o rcanno t b e verified) , maintai n takeof f thrus t fo r3 minute s durin g takeof f o raccomplis h a 3 minut e takeof f powe rgroun d run . 3 . I f yo u encounte rengin e surging , reduc e powe rt o eliminat e th e surg e an d lan d usin g singl e engin e procedures . Th e engin e doe s no t nee d t o b e shutdow n i n flight unles s surgin g continue s a t kll e power . Operator s ar e encouriage d t o report instance s o f engin e surg e t o Eclips e o rP&V^AC , an d includ e a pilo t report describin g th e occurrenc e an d resultin g action s take n byth e crew . I f yo u hav e an yquestion s o r woul d lik e additiona l information , contac t Eclips e Custome rCar e a t 1-877-350-0538 . Eclips e representative s ar e availabl e t o assis t yo u 2 4 hour s a day , seve n day s a week . Bot h Eclips e an d P&W C ar e full ycommitte d t o addressin g engin e surg e occurrence s wit h th e utmos t priority . W e wil l infor m yo u o f progres s a s update s t)ecom e available .

250 3 CLAR KCAR R LOO P S E ALBUQUERQUE , N M 8710 6 TE L 50 5 724-120 0 VWWV.ECLIPSEAVIATION.CO M 

### Pag e 2 o f 2 CP C For m Re vA09/18/0 7