Skyknigh t Ai rServices , Inc .

511 5 NWl fTerr , 39 B F t Lauderdale , F

L3330 9 Watermaker s Air , Inc . 254 5 NW55*' ' Court , Hange r2 6 F tLauderdale , F

L3330 9 Dolphi n Atlantic , Inc . 70 2 S W34' " Stree t F t Lauderdale , F

L3331 5 Davonair , Inc . 972 5 NWS^ " Street , Suit e 50 3 Doral , F L3317 8 Exemptio n Sought : Exemptio n Request :

Reaso n fo rRelief :

Safety : History : 

## PETITIO N FOR EXEMPTIO N T O 135.183(a ) Relie ffro m 1 4 CF

R 135.18 3 (a ) Authorizatio n fo rSl<yl<nigli tAi rServices , Inc. , Watermaker s Air , Inc. , Doiplii n Atlantic , Inc. , an d Davonair , Inc . t o conduc tair-carrie roperation s witl i passengers fo rliir e beyon d glidin g distanc e fro m land . W e reques tth e adoptio n o fICA O Anne x6 , Part1 , whic h allow s 1 5 minute s a t cruis e powe rsettin g (4 1 n.m . fo rth e Cessn a 208 B wit h Carg o Pod ) beyon d th e power-of f glidin g distanc e t o lan d pe rC-208 B AF M Figur e 3.1 . To ensur e complianc e wit h 1 4 CF R 135.183(a ) i n high-densit yenvironment s wher e AT C Approac h an d Departur e fixe s an d altitude s ma yplac e turbine-powere d single-engin e air carrie roperator s wit h passengers fo rhire , beyon d th e power-of fglidin g distanc e o fland . AT C currentl yrequire s th e abov e liste d operator s t o descen d t o a n altitud e whic h put s the m beyon d th e glid e t o lan d distanc e becaus e i ti s "necessaryfo rlanding. " 1 4 CF R 135.183(b ) doe s howeve rprovid e a n exemptio n t o 135.183(a ) whic h reads : "N o perso n ma yoperat e a lan d aircraf t carryin g passenger s ove rwate runles s i ti s necessar yfo rtalieof fo rlanding. " Th e Prat t an d Whitne yPT6-114Aturbine-powere d engin e i n th e Cessn a Carava n has ove r1 8 Millio n Flee t hour s an d a n extraordinar ydocumente d safet yrecord . ICA O has alread ycertifie d th e Prat t& Whitne yCanad a powere d PT6-114Aengin e i n th e Cessn a Carava n fo rsuc h over-wate roperations . (Se e excerpt s below )

ICAO Internationa l Standard s an d Recommende d Practice s

Operatio n o fAircraf t Anne x6 t o th e conventio n o n Internationa l Civi l Aviatio n Part 1 Internationa l Commercia l Ai rTranspor t- Aer o plane s Eight h Editio n Jul y200 1 wit h amendmen t2 9 

### 6 . 6. 1 Rout e limitation s ove rwate r Operator s o fsingle-engin e turbine-powere d aer o plane s carryin g ou toperation s a tnigh t and/o ri n IM C shoul d mal^ e a n assessmen to frout e limitation s ove rwater . Th e distanc e tha t th e aer o plan e ma yb e operate d fro m a lan d mas s suitabl e fo ra saf e force d landin g shoul d b edetermined . Thi s equate s t o th e glid e distanc e fro m th e cruis e altitud e t o th e saf e force d landin g ar e followin g engin e failure , assumin g stil l ai rconditions . State s mayad d t o thi s an d additiona l distance s takin g int o accoun tth e likel yprevailin g condition s an d typ e o foperations . Thi s shoul d tak e int o accoun tth e likel yse a conditions , th e surviva l equipmen tcarried , th e achieve d engin e reliabilit yan d th e searc h an d rescu e service s available . 6. 2 An yadditiona l distanc e allowe d beyon d th e glid e distanc e shoul d no texcee d a distanc e equivalen t t o 1 5 minute s a tth e aer o plane' s norma l cruis e speed . Engin e Reliabilit y Th e Carava n engin e reliabilit yi s mor e tha n 200 % th e ICA O requirement . Reference : Appendi x3 Additiona l requirement s fo roperation s o fsingle-engin e turbin e powere d aer o plane s a t nigh t and/o ri n Instrumen tMeteorologica l Condition s (IMC) . Paragrap h 1. 1 Turbin e engin e reliability . Turbin e engin e reliabilit yshal l b e show n t o hav e a powe rlos s rat e o fles s tha n 1 pe r100.00 0 engin e hours . Th e Caravan' s P&WPT6-114Aengin e ha s accumulate d ove r1 8 millio n flee thour s an d continue s t o ad d 1,000,00 0 hour s annually . Curren tP& WMTBU R (Mea n Tim e Betwee n Unschedule d Remova l Rate ) i s 1 pe r250,00 0 hour s o foperation . Thi s i s mor e tha n twic e th e ICA O requirement . Additiona l P& WPT6-114 Ahistorica l dat a -27,91 0 Hours o n Highes t Tim e Engin e -9,00 0 Hours . Highes t TBO . FedE xroutinel yoperate s thi s engin e 900 0 hour s betwee n overhauls . 3,60 0 Hours i s th e basi cengin e TBO . -2,18 4 Engine s produce d wit h 1,79 9 installe d Advanc e i n Engin e reliabilit yove rpas t4 0 year s Ove rth e las t 4 0 years , th e reliabilit yo fje t& turbin e engine s ha s increase d dramatically . Nowher e i s thi s mor e eviden ttha n i n th e Airlin e industr ywher e i n th e pas tonl yjetliner s wit h 3 o r4 engine s crosse d th e oceans . No wjet s wit h onl y2 engine s routinel ycros s th e oceans . Initially , th e 2 engin e jet s ha d smal l we tfootprints , bu tas th e reliabilit yo fengine s increase d an d saf e flyin g hour s accumulate d b yth e millions , th e we tfootprin twa s increase d significantly . Th e ICA O regulator s hav e recognize d thi s an d recommende d a we tfootprin tfo rth e Carava n detaile d i n poin t 3 below . ICAO recommende d we t footprin tfo rSingl e Engin e Turbin e ove rwate rflight s Reference : Attachmen t I Additiona l requirement s fo roperation s o fsingle-engin e turbine powere d aer o plane s a t nigh tand/o ri n Instrumen tMeteorologica l Condition s (IMC ) Paragrap h 6 Rout e limitation s ove rwate rParagrap h 6. 1 Paraphrase d "Powe rof fglidin g distanc e t o a saf e landin g are a fro m cruis e altitud e i n stil l ai rconditions. " Paragrap h 6. 2 Paraphrase d "additiona l distanc e beyon d th e powe rof fglidin g distanc e i n 6. 1 abov e shoul d no t excee d a distanc e equivalen tt o 1 5 minute s a taer o planes ' norma l cruis e speed . Th e equivalen t distanc e o f1 5 minute s a tcruis e spee d i s 4 1 mile s wit h a 16 5 kno tcruis e spee d givin g th e Carava n a 4 1 mil e we tfootprint .

tes . Inc . Signatur e Nam e an d Dat e Dolphi n Atlantic , Inc . Signatur e Nam e an d Dat e ^

Nam e an d Dat e Dav9;nair , Inc . Signatur e Nam e an d Dat e 

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