Legal Interpretations
Duncan-AFS-1 2 2016
Page 1
Federal Aviation Administration Memorandum
Date:
To:
From:
OCT - 2 2011 _.._ ~~hn ~~ear, pirector, Flight Standard Office, AFS-1 ~~~'Si stant Chief Counsel, AGC-200
Prepared By: Katie Inman, Attorney, AGC-220
Subject: "Exclusive Use" Under 14 C.F.R. § 135.25
This memorandum revises an August 22, 2016 response to your request for clarification concerning 14 C.F.R. §§ 133.19 and 135.25. It addition, it responds to your inquiries concerning use of an aircraft for solo flights during flight training and duration of a certificate. This response contains answers to the three questions you posed, each of which concerns exclusive use. The August 22, 2016 response will be removed from the legal interpretatfons database. "Exclusive Use" and External-Load Operations You asked whether an operator with a single aircraft can satisfy the "exclusive use" requirements of§ 135.25 if that operator holds both an air carrier certificate under part 135 and an operating certificate under part 133. The answer is yes, an operator may use the same aircraft to satisfy both§§ 133.19 and 135.25, because the regulations do not require different aircraft to satisfy each regulation, and because§ 135.25(b) permits an operator to use the aircraft "for other than operations under [part 135]." Your question posits a hypothetical scenario involving a helicopter operator who maintains possession, control and use of one helicopter listed on a part 133 operating certificate who now seeks an air carrier certificate under part l3 5, using the same helicopter to satisfy the "exclusjve use" requirement of§ 135.25. Sections 133.19 and 135.25 both require exclusive use of an aircraft. The FAA defines "exclusive use" for purposes of§ 135.25(c) by stating a person has exclusive of use of an aircraft when that person "has the sole possession, control, and use of it for flight, as owner, or has a written agreement ... in effect when the aircraft is operated, giving the person that possession, control and use for at least 6 consecutive months." In prior legal interpretations, the FAA has emphasized the plain text of the definition of"exclusive use" in§ 135.25(c) means an aircraft designated as an exclusive-use aircraft that two different part 135 certificate holders operate cannot be considered an exclusive-use aircraft under§ 135.25(c). Letter to Francis M. DeJoseph from Rebecca B. MacPherson, Assistant Chief Counsel for Regulations (June 25, 2012).
Page 2
Section 133 .19, which applies to external-load operations, also requires exclusive use of at least one rotorcraft that fulfills certain criteria. Like§ 135.25(c), the section defines exclusive use as "the sole possession, control, and use of [the aircraft] for flight, as owner, or has a written agreement ... giving him that possession, control, and use for at least six consecutive months."
The plain language of neither§§ 133.19 nor 135.25 prohibits the aircraft that satisfies the exclusive use definition within each section from being used for another type of operation. In fact, § 135.25(b) expressly recognizes the possibility that different operational parts may apply depending on the use of the aircraft, by stating, " [h]owever, this paragraph does not prohibit the operator from using or authorizing the use of the aircraft for other than operations under this part and does not require the certificate holder to have exclusive use of all aircraft that the certificate holder uses."
The relevant guidance addressing exclusive use, as well as prior FAA legal interpretations, establishes " exclusive use" is one of the critical components in establishing operational control. The regulatory history of§ 135.25 verifies this intention. The preamble accompanying the Final Rule for § 135.25 explains, "only one certificate holder at a time can have an exclusive use contract for a given aircraft," and emphasizes an applicant or certificate holder "should reasonably expect to either own or have exclusive use of at least one aircraft." 43 FR 46763 (Oct. 10, 1978). The preamble also states the rule is intended to provide "positive control for both operation and maintenance of that aircraft." Id. The rule focuses on a single operator having exclusive use of at least one aircraft. Your hypothetical scenario asks about such a circumstance-a single certificate holder, rather than multiple operators or certificate holders. Based on the foregoing considerations, an operator of external-load operations under part 133 could use an aircraft that fulfills the requirements of both§§ 133.19 and 135.25. "Exclusive Use" and Flight Training You also ask whether a part 135 operator's "exclusive use" aircraft that is used in flight training operations for a flight school can be used for solo flights with flight school students, when the same person owns both the part 13 5 certificate and the flight school. Your question poses a scenario involving a small airport that has a contract with a person to run a Fixed Base Operation (FBO) that also requires the FBO owner to have a part 135 certificate. ln the interest of increasing aircraft utilization, the operator may choose to offer flight instruction, which involves solo flights students take in accordance with part 61. You ask whether such flights are permitted in the exclusive-use aircraft, and whether the solo pilot would need to be an employee or agent of the part 135 certificate holder.
In general, the regulatory part under which the operator derives its authority for each operation must be unequivocal and widely understood by the operator, any associated crew, any student who is operating the aircraft, and the inspector, upon request. Section 135.25(b) contemplates such an operation because it states the text of§ 135.25(b) does not prohibit the operator from using or authorizing the use of the aircraft for "other than operations under this part." An operator may use the "exclusive use" aircraft for flight instruction, including solo flights, as long
Page 3
as the certificate holder's operating manual, company procedures, or other similar documents clarifies these regulatory provisions and authorizes such operations, and the FAA has accepted those procedures.
Termination of Exclusive Use and Duration of Certificate
As noted above,§ 135.25(c) sets forth a 6-month consecutive time requirement in defining "exclusive use.'' The paragraph specifically states the person who has exclusive use must have "possession, control and use of it for flight." This language establishes the aircraft used to satisfy the exclusive use requirement of§ 135.25(b) must be in an operable condition; hence, the regulatory text's inclusion of the phrase "use of it for flight" in providing the list of requirements.
The FAA is authorized to talce enforcement action against an operator who has allowed an operating certificate to become dormant by not maintaining an operable aircraft. For example, in Sunworld International Airlines, Inc. v. NTSB, the United States Court of Appeals for the District of Columbia Circuit affirmed the FAA' s revocation of Sunworld' s air carrier certificate due to lack of economic authority after FAA personnel facilitated repossession of the airline's only aircraft listed on its OpSpecs. 305 Fed.Appx. 663 (2008). The FAA had notified Sunworld that it planned to revoke the certificate, but withdrew its notice five months later because Sunworld asserted it intended to resume service. The FAA eventually ordered revocation, which the court affirmed because Sunworld had neither possessed nor flown the only aircraft on its OpSpecs for nearly two years at the time the FAA issued the order. The court held Sunworld's intention to resume operations was irrelevant, and stated the FAA was entitled to prosecutorial discretion in determining whether to talce action against Sunworld. In light of this discretion, AFS may consider establishing guidance to set forth a general timeframe in which AFS consults with AOC when considering whether to forego or pursue enforcement action against an operator who, as you ask in your memorandum, may lose the exclusive use of an aircraft due to an unforeseen loss of a lease or an act of God. As you know, the Administrator's updated compliance philosophy encourages consideration of a variety of actions in ensuring adherence to the regulations. AOC is available to assist AFS in the consideration of enforcement options.
This memorandum has been coordinated with the Air Transportation Division, AFS-200.
Page 4
Fede.ral Aviatio~ , Administration Memora.ndu·m IJ~ t!! : AP.R 4~· Z016:
Tb: Mlidc :Wi~:BLtr.J;\ A.s~f~l!'f~1 .thiofCo uns cl 1 hl~Qrnutfo n al l.nw 01 ..
Fr~m: · .lolln S. P.ui10nn, l)lreol01'. Jiliglit St0ndords ServlCo, Ai'S'l: .. :::·'. '· ej;~: · l.:~_S l sli1 tfon . ?i1iu R4gulaiJ.ons Division, AOC-200 t!t.:,' ··C) . . ..
Rc.qncst 1'1>1' L!!S~ Ir1terj~i·o111~iQn.::. t.4 f;::FR 1>11r1 I35 SccHm1 .~?.~5~ .•, ' ... , . • .... ····"1• .1 • fllight.' ~ta11~!-Jt:~$ .Scrv,icc; AfS ~; t\l fs.. frfrcceip~~f'· a· rcqu~sl froni tho Air · nt1~:;p'qi111tio11 Qi,.i)§IC>'.ri.1 ~f..S~290 rhr n.. l c~Jl · lillctt#~fl~JoLt gt:9:1C.A4 .o~~ 1!~ r1 t 35 scc1 jqn 1~s.~s t Th ~110 ~r~rq.~jps1ton~ _. ni·,slnS: l'rom,thn-eceltl Oene1•al /\y.mhon- Prn1 c i. pnl .Oporntin~ hispc.c101· Co1trcroncCil1· 'f.l ii!~urc~o'f' n' tc l.nli~cly pfu:!$h1g ngI~-~~~~~~lf~tef.~~11 .sf>ri.ngb onrd for tM QrQt\~~.r dis~iis,Si c>n 6,( "cxcl 11s1 vo u~c ~ · schc<Juted·l or:i~tcr:l1ns .year.
I...Gun lll\ opur~lot wllh n s.thgl_e·afrctp:fl s:i~isfy J11c requirements of 0oxolusi~d~.r· ff !l\l:\l. opcrbtt>r ltol<JS bC>lh an.<1/i" .carrier ccrlificalc under J>nrt 135 CFR Section 135 tlhtfbrn)J?pJtl/i!tg ~Ct111j9t1lc fo1· rolorcrn'l\ CXll-'nlal load under 14 CFR Part 133? 11lC :1ircrul\ to be USild _l\S~li.c -- "c:-.'Cl11sivc U l)C~' nfrcrafi-for both CQJ'(iticales-\Yould be under the sole possession, confro l ruici vse. o l' fhc S11l11·c. !)C:l'SOll llS doJine<fby. iii cf!'R. Sc'ction 1.1. ·mo 1urm "cxclusi ve Ul!C" or lm airctatfl)>i iiiJ :11ii;;.c,11rrior dnl9s' b11~hlt.P f?.4~ ~vh on it_lirst ~·ppc\lr<fd· hi rt:gii!utory l nogu~l!C.:. Oxcttgo c 11~ij ii.li ,yctW$.i It,:; m.C(1llin~ .~ltlti1).P..i.JU\:ntion ~!\s~v.o l vc~ a 11~ hsJo~ J (ptorprctution ~111> . boon rclfoed.. C\ir\·01 1.tl~\ lh01 fe'tj !ik~J)~t!'li lifot:"'c s.clciSi...tc. uso~ falls undcf.'..ltl.iOflR IJS;-25 IQr·Oh ll{fl:tJ11i:l/tr..t -· ----~ .9a r\Hi!;;!,\f~i ~lld ~ \lii~¢.r..1 if. ~H il .:Scdloi1 i ~ar! I33. 19 lbr.lJn.111itJJ.!(l{fng ccrliH~i\ 1 ~ Cor. tq'1()1~~i!p'(f. cX'tei:n11 l : IM<l '~>pcrnJl011s 1 :'.Scc;.narfo: Nhclico·ptcl' opcmtor .Jin.s one he! ic.()J).l~I' u11d 11 part.. f:B !.np~ta011g. cert ilfoolc.'in'' .ordifr'lo contlticl tix'tc1·iiid loud opc:ratiqils, Wthl's <>jlcl·utor ptcv cnt¢~ . ll:Qm ·~:bt'11h1 i~k.~1 pi\(1: 15·5 11/r c:nrrie1~ cc)1i1iC.n1 ~, .beotiu:;~ .(he>~ dq no.t'h11v:c. unothcr 11hw1.1n. to 4csf~llflte :'11n111 ' 1c!<olu1;i vc u se~~ uirci·1dt ·lbr: the--scpornte tt/11 c{lr1·/tJI' .C!Crli li~a1c.~ 2·.i I. ~ u. p11~l 1.J.5 !>!11.?f.l\lQrl~., -!·~.~¢.h.iSiv.~ !u~TJ·-~Jir~ru !1J~ uscq In Ol gh t'. j~u l(tiiig Q l}crulH,ll.lll': for.,_•~· rlishf scho.ol do itt<» llll:J11;-inslrJ1otorsJliu,1.c"lo,ul s_o·:bo cmployecsh1QC1lL-; ·or 1!10 purl 135. o~rotor:Jo. ' h1~rr:ucJ;in th.ls~ l rPr~n !ii ri:~!:1-t'otl.h!?i>ix:'ra{6r t o · m~inCninloJ~ p~ si;.ion .~.ri,d ~~ •f!IP,\V~J1rf\f.S 91114 (· foi>ln1ctjo_o, ~ ;J.Cll*Jll ~lWSl cvcQ!!Jatly Oy s0Jo·wi1.h.110 mstruciQqm, ~onrd.. C_iioJ~,- .- _ cxolusi\•o use nirornn 'tic: nil owed to b~ tiScd !Or solo 'ili~hr s '\lilh students bf th c~)lgn~~Wo1>_!jt) un 'tiirern~ t.hnt Is J!~c ·~exch~sive u 1sc"~~1 oJ thc1pu11135 operator, If fho snmc:- pc1'$,91l . ~\\IJ~ botfi the IJS ccrtlflcate and the ll1ght.~hool '?
,,
Page 5
:'t ~ec~nlfo~ ~1n~tso1nll nlr1?orl~.buve tLcontradt wiih·o.pertion L<>. ~n:1i' }'i;{~;B.nsc[QM~H"Dn~ .~1~1,3()) t1_u1(:ollio -~ql.t it4~Jhetl'l to p~v~~qmrt 135 nil' c-hn'i'c1~ ccrlflit'..'utl!l, llnU11hctcforo·JlP: -~ ·. oxc lmrive usc'' tilrc1·ur't.:. As n1J1pnns to.ihcrc_Hsc- aircril(f u111izotLb11, t~c_y -mhY '.Cbt\j>f~,tfe:!f.gt lligl\l .iristruo!lon anCJ)tced lo solo students <1$ .re9ulretl by part 61 ccrt i (icai lo11 -:r:c~~1t~tfotJ~/~~ lm1& ~!~},~~f~!~rnt~r Taii1t ai~s :s~Jc ,l~Qsscs~i q~!·. bp~ruti~m\J ~on ttol nn~! l!S~ ot-'t l~~tit?mll, :arc 1J1csi: OliMs.nll<iwcd ·m·1hc "e>;c1us11l<: usen_q11·01-ntW Po.cs the s9lo p,ll.ot linvc to ~9- ~n ~mp l qyei;:/4gQnl of:!lfo J.3·?- ccr(lfici1t~ . b.~l~i;T?:
· ~· 1F::i.t,WJ.lYi·,.~~\~· l'!l\rg_ ~}i~1 tJ.j~::?:~~1~y-p)fu\V':an operatot tb .r.itn1ln 11 c~1·1l'Oc~t~ ·-nft~ mrcy~' :~~u~~g~ · thc01:19:no·,Joi1geJ)UW!J -lln!.-~~-~~Jll~i¥¢i~1 ~crrt!r,craft? 'Docs.u 1hn(1t!f•\W:t> ~~c:y~ 1~b ~ !q!1gci: li'W£ ~it ·'.'W~l.l\~.~~c '(i'~9"' ·b,fr~r~1\. :{11et..'Of(loC1.vi&c.{1 ~ale or thc:uil'cra!l by. ~he; op~r.n1oi:nm11!a1\11~9..h;i~sL~Y:n.: lcmxc;;1.fll::A!ll)ef.)9 Wli~·~cv.c;1\l'JmQ :fhii)je ii; ~ccmcd upp~()priale? "W.hot ·uett()Us i"riull(bG! vhik~ti w:fth r-0spu'l!l :1<ul1c 6pcrator's parl 13 $ alr-cμrrii:r <.'<lrti ficatc at the encl :Or- Hliit Ho1.c?. :lV.Ttl~t Jh.~-~FAi\;· i11Hit1tt! f(i::i101.l (o ~cyoke lite ~ii· currier ccrLHlca1c,. which could take )'cnrs. or may }lieiii~A - nc~cp(: the susponui'cm fl}dpfinhcfy in lieu of r<.IVt>cam:Hl? · :.1,r y(>u · ~\11:-{Q)\}'Y,, cjU.cs1i9,ils: P_!~s~~~?-•Jf!~~l-~~hfWMollid~~r Aviudori Snfoty fhspcct<w, Air Carrier :OQCl'llUt>m;:Drnnch. 1WS·25P;Jtl (~02rn~1'-45.~2.
--······- ----·----·--------
Retrieved from ecfr.gov on July 18, 2026.