# STC SE2004NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Tulare Aircraft Service, United States
- Description: A three planetary impeller drive, inconel exhaust valves, and other changes to improve engine reliability.
- Applied: July 21, 1983
- Status date: August 29, 1983
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E-272](https://openairdocs.org/tcds/E-272)
- Certificate PDF: https://openairdocs.org/files/sha256/1d/7d/1d7da0edc4a07fec16dd1448d6c1b1648ffb584c1b2b2364985acc29d5d5cb5b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7EBE2CB1D4342F648625731400559AA8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SE2004NM

## ADs that name it (0)

None.

## Approved models (1)

- Curtiss-Wright/Marquette Inc. Double Row Turbo Cyclone 972TC18DA1 (R-3350-34; -91) ([TCDS E-272](https://openairdocs.org/tcds/E-272))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

" -.' .... ;'! ',',----------~--- \iniltd ,l3111ltJDf9.mcricg Beparcmencoft:ransportation-;federalI1lliationI1dministration ~upplrmrntel1C~prQ:rrtificetr ~ SE2004NM " </Ek civilAir E-272 Curtiss- Wright R-3350-34Engine Coil ./'I Col' /'/ '1" .';://L4cr</'{,:"~'l J)'/'~J/L4jt.n'l"'<":?,,,: Ml 1taryengInemodelR-3350-42,whIChisamodel R-3350-34enginepreviouslymodifiedatoverhaulinaccordancewithR-3350Engine Bulletin676,is approvedwheninspected,alteredandtestedinaccordancewith Appendix1of T.B.M.,Inc.Report70/72-01.DesignchangesintheR-3350-42 comparedto theR-3350-34includea threeplanetaryUffipellerdrive,inconelexhaust valves,andotherchangesto improveenginereliability.TheR-3350-42engineis definedby U.S.NavyPartsManualNAVWEPS02A-35JL-4datedJuly15,1962.

~;"'/"{,;.n.J'dndc"nd,{,;"",.. Thisapprovalislimitedto R-3350-42modelengineswhich, ifpreviouslyoverhauled,wereoverhauledpermilitarymanualslistedunderItem5 of Page4 of thecontinuationsheet. Thisapprovalshouldnotbe extendedtoany engineon whichotherpreviouslyapprovedmodificationsareincorporated,unlessit isdeterminedthattheinterrelationshipbetweenthischangeandanyof thoseother previouslyapprovedmodificationswillintroduceno adverseeffectuponthe airworthinessof theengine.

~Referto continuationsheetpage3 ) .7.h~,€'~"/0'rflh'~lnd /h, 4t"y0""'/'''';y''~;'''''uoh.fc-"1t~.lh","lJ~;:~ "':10""'''11~#I//_''''''U'''' ....,'/#rl ,,,,nh/,.Ju,.- f"H4i!::~ .:;~.,: ...,~ t;, .f" July21,1983 August 29, 1983 ./ -tt- (.I"g''''u,,) /rzv~l Manager,LosAngelesAircraft CertificationOffice ('/ ltl,) A flY a"rration of thl's urqfieatt is punishablt bv a fin, of not tX(udin.S! 11,000. or imprison"",,/ not txcudin,t: 3 )'tars. or both.

J Au (utlfual, mI:ll bt tumJjnr,d In o((o,dana wltll FAR ll.l7.

'AA'o..oo. '110-2 (10-01)

tinlttd.stattSofgmmc~ ~cpartmcntof1:ransporcation-.fcdcral£'lIJiation£'ldministration ~upp(cmcntQ(1[~pcQ:cftifiCQtc (Q:ontinuation~hcet) ~~ SE2004NM 'Ihelimitationsandconditionsof TypeCertificationDataSheetNo.E-272apply exceptas follows:

I) '!heR-3350-42m:Jdelengineisapprovedonlyforlowratioinduction<XllIlPressor driveoperationwithauto-richmixture,andmanualsparkretardsetting (250 - 250) using,100/130minimumgradeaviationgasoline.

2) An FAAapprovednameplateshallbe installedadjacentto theexistingnameplate includingthefollowinginformation:

STeNo.SE2004NM STeHolderTulareAircraftServiceInc.

EngineModel- R3350-42 EngineSIN FuelOCtane 100/130 ------- IgnitionTiming- ManualSparkRetard(250 - 250) FuelMixture - AutoRich PowerRating - Takeoff2880HP @ 2900RPM (AtSeaLevel) Max.Cont.2380HP @ 2600RPM

3) EngineWeightandC.G.location(dry) 3720Ibs.

CompleteEngineWeight C.G.Location- Fbrwardof Mounting FlangeCenterline AbovePropellerShaft Leftof VerticalCenterline

18.06 .133 .014 inches inches lnches I~;i~i~_~ ri~W,~.;!- .0..

completeengineincludes- allaccessarydrives,enginelubricationsystem, firesealadaptercomplete,allpipingandcontrolsbetweenengineparts,fuel injectionsystem,mastercontrolscreensandgaskets,ignitionsystem,priming systemon engine,coolingairdeflectorsandbaffles,accessorydrivecovers, androckerboxdrainmanifoldandsumpsystemperWrightServiceBulletinNo.

Te18E-166A.

Any allaotion of this "rliftea!!ispunishfb/e byofint of notexceeding81,000, or imprisonmtn/ not excuding 3 years, or both.

..,.:-n.,.1 ., .• ' • • ~l. • FAA FORM 8110-2-1 (to-69) This ftrlijl40lemayb, traniftrrtd in Quo,daruewith FAR 21.41.

**PAGE 3 OF 4 PAGES C FAA AC73.2651**

'. '~:. .' .:' tinfttd~tta: or9mtrica 3atpartintntor1::~ansportation-.1tdcralalliationadministration ~upplf111rntGI~nprQ:cftifirGtr(Q:ontinuation~hcct) JV~ SE2004NM .,.:.,. :.1

PerformanceRatii:- (Ref.Curtiss-WrightOperatingInstructionsdatedMay 1963 forR-3350-34,4 , 93and981TC18EA-1engines) TheR-3350-42modeliseligibleforusewithgrade100/130,108/135octanefuel, withauto-richmixtureat thefollowingratings:

4) Withlowimpellergearratio Max.COntinuoushp,rpn,in.Hg.,at:

Criticalpressurealtitude(ft.)

SeaLevelpressurealtitude R-3350-42

25.BTeIgnition 2450-2600-41.5-9400 2380-2600-43.5-S.L.

Takeoff(5min)hp,rpn,in.fIg.,at:

Criticalpressurealtitude(ft.)

SeaLevelpressurealtitude 2950-2900-48.0-8500 2880-2900-51.0-S.L.

Operationinhighimpellerratiowithanygradefuelisnotpermitted.

5) The followingMaintenance,OverhaulandPartsManualsor laterawroved revisionsarerequiredforcontinuedairworthiness:

.':' .: ~.,. WrightAircraftEnginesTurboCompoundMaintenanceManual& 988TC18EAseriesenginesrevisedJune1, 1969(Sections fortheR-3350-42engine.

forModel972TC18DA 70-83)isrequired US NavyOverhaulManual02A-35JR-3datedJune1974andUS NavyPartsManual NAVWEPS02A-35JL-4datedJuly15,1962arerequiredforModelR-3350-42 engine.

FAA FORM 811C~2-1 (lo-6!J) This certificatemay betransjtrred in accordaMIwilh FAR 2/.47.

**PAGE 4 OF4 PAGES**

## Every issue (1)

- August 29, 1983: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1d/7d/1d7da0edc4a07fec16dd1448d6c1b1648ffb584c1b2b2364985acc29d5d5cb5b)

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