ST00252BOEngine and powerplant
Installation of Pratt & Whitney Engine Services, Inc. Digital Aircraft Data Acquisition System ADASd.
FAA holder: Pratt & Whitney Engine Services Inc.
FAA STC category
Engine and powerplant STCs
Engine, turbine, exhaust, nacelle, inlet, and related powerplant changes. This directory contains 1,512 selected records listed with status Current in the June 30, 2026 FAA DRS snapshot and links every entry to its source.
Showing 961–1,080 of 1,512Page 9 of 13
View record
ST00253BOEngine and powerplant
Installation of Pratt & Whitney Engine Services, Inc. Data Transmission Unit (DTU).
FAA holder: Pratt & Whitney Engine Services Inc.
ST00261BOEngine and powerplant
Installation of Pratt & Whitney Engine Services, Inc. Data Transmission Unit (DTU).
FAA holder: Pratt & Whitney Engine Services Inc.
ST00262BOEngine and powerplant
Installation of Pratt & Whitney Engine Services, Inc. Data Transmission Unit (DTU).
FAA holder: Pratt & Whitney Engine Services Inc.
ST00263BOEngine and powerplant
Installation of Pratt & Whitney Engine Services, Inc. Data Transmission Unit (DTU).
FAA holder: Pratt & Whitney Engine Services Inc.
SR02471NYEngine and powerplant
Installation of Diamond-J 61000-(103, 104) Power Turbine Inlet Temperature T5 Indicators (TIT).
FAA holder: VIH Aerospace Inc
SE976SWEngine and powerplant
General modification to engine changing O-470-11 to O-470-11-13-15.
FAA holder: Stephen Noyes
SE699SWEngine and powerplant
Modification of 0-470-13 engine to 0-470-13-11 in Cessna 305A aircraft.
FAA holder: Stephen Noyes
SA4057WEEngine and powerplant
Installation of a muffler and exhaust heat exchanger.
FAA holder: Aero Fabricators Co
SA00433ATEngine and powerplant
Installation of Pratt & Whitney model PT6A-42 engine, Hartzell model HC- B3TN-3G or HC-B3TN-3N with Hartzell T10178B-3R, T10178NB-3R,T10178K-3R, or T10178NK-3R propellers.
FAA holder: Blackhawk Modifications Inc.
SA4-387Engine and powerplant
ONE ONLY STC -Installation of Propeller Spinner and after body and modification to carburetor air inlet duct. S/N 28048.
FAA holder: Vanaero Company
SA4-529Engine and powerplant
Short engine exhaust stacks and modified nacelle and exhaust shroud on aircraft equipped with Wright R-2600-29 engines.
FAA holder: Vanaero Company
SA302NWEngine and powerplant
Fabrication of engine mount and fiberglass cowling.
FAA holder: Burl's Aircraft LLC
SA1213NWEngine and powerplant
Installation of a Franklin 6AS-350-A or A1 engine, Rajay Model 325E10 turbocharger, McCauley 2A34C22-N/84S-4, -6, or -8; or a Hartzell HC-C2YF-1BF/F8459A-4 to -8 propeller, and associated systems.
FAA holder: Herning Benjamin N.
SA01156SEEngine and powerplant
Installation of a Pratt & Whitney PT6A-21 engine flat rated at 500 HP, 2200 RPM and a Hartzell HC-E4N-3N/D8292 propeller and associated hardware.
FAA holder: West Pacific Air LLC
SA00633DEEngine and powerplant
Installation of Leading Edge Exhaust System.
FAA holder: K. W. Aviation Inc.
SA01442WIEngine and powerplant
Installation of Lycoming IO-360-A1B6D engine, McCauley B2D34C207/78TCA propeller, and associated systems modifications.
FAA holder: Vanderhoof Chad
SA09224SCEngine and powerplant
Installation of a modified Textron Lycoming O-235 engine (modified for use of only ethanol for fuel).
FAA holder: Maximum Performance Inc.
SE8707SWEngine and powerplant
Alteration of Lycoming O-235 engine to allow use of ethanol fuel.
FAA holder: Shauck Dr Maxwell E Jr
SR09154RCEngine and powerplant
Installation of Benz P/N BAS-212/412-150G Engine Oil Pressure Transducer.
FAA holder: Benz Airborne Systems
ST01007CH-DEngine and powerplant
Installation of AlliedSignal Aerospace N1 Digital Electronic Engine Control (DEEC).
FAA holder: Honeywell International Inc
ST01424CH-DEngine and powerplant
Installation of Honeywell N1 digital electronic engine control (DEEC).
FAA holder: Honeywell International Inc
SA01289ATEngine and powerplant
Manufacture of composite engine cowlings.
FAA holder: North Central Aircraft Products Inc.
ST01951LAEngine and powerplant
Installation of a TFE731-4-1C, engine part number 3075900-1.
FAA holder: Premier Aircraft LLC
SA02047LAEngine and powerplant
S/N L4413 ONLY: Installation of a Teledyne Continental Motors model C85-12 engine (modified by STC SE00979AT) and a McCauley model 1B90 propeller.
FAA holder: Anctil Gary
SA166CEEngine and powerplant
Twin-engine electronic synchronizer and unfeathering system.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA168CEEngine and powerplant
Twin engine synchronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA174CEEngine and powerplant
Twin-engine electronic sychronizer for aircraft equipped with Hartzell propellers.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA188CEEngine and powerplant
Twin-engine synchronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA213CEEngine and powerplant
Twin-engine electronic sychronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA231CEEngine and powerplant
Twin engine synchronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA25CEEngine and powerplant
Twin-engine electronic synchronizer.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA30GLEngine and powerplant
Installation of electronic engine synchronizer system.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA412CEEngine and powerplant
Installation of Woodward Electronic Engine synchronizer system.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA698CEEngine and powerplant
Install Woodward electronic engine synchronizer system.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA756CEEngine and powerplant
Install Woodward engine synchronizer system.
FAA holder: Ontic Engineering and Manufacturing Inc.
SA8GLEngine and powerplant
Installation of engine synchronizer kit P/N 213522.
FAA holder: Ontic Engineering and Manufacturing Inc.
ST00699CH-DEngine and powerplant
Installation of an AlliedSignal Aerospace TFE731-3DR-1D Turbofan Engine.
FAA holder: Honeywell International Inc
ST00703CH-DEngine and powerplant
Installation of an AlliedSignal Digital Electronic Engine Control (DEEC).
FAA holder: Honeywell International Inc
ST341CH-DEngine and powerplant
Installation of AlliedSignal TFE731-3D-1C Turbofan Engine(s).
FAA holder: Honeywell International Inc
ST458CH-DEngine and powerplant
Installation of an AlliedSignal Aeropsace TFE731-3D-1G Turbofan Engine(s).
FAA holder: Honeywell International Inc
ST459CH-DEngine and powerplant
Installation of an AllliedSignal Aerospace TFE731-3D-1(F,K) Turbofan Engine.
FAA holder: Honeywell International Inc
SA02367NYEngine and powerplant
Installation of the Pratt & Whitney Canada, PT6A-135A engine modified with dual fuel feed lines,.
FAA holder: Standard Aero Inc
SA01095WIEngine and powerplant
Installation of Gomolzig C172R-606550 engine exhaust system silencer.
FAA holder: Gomolzig Flugzeug-und Maschinenbau GmbH
SA01096WIEngine and powerplant
Installation of Gomolzig C182R-606550 engine exhaust system silencer.
FAA holder: Gomolzig Flugzeug-und Maschinenbau GmbH
SR02346NYEngine and powerplant
Installation of replacement firewall cover assembly.
FAA holder: Alpine Aerotech Ltd
SA09039SCEngine and powerplant
Installation of the AlliedSignal TPE331-10U engine with the Hartzell Model HC-B4TN-5NL/LT10890N propeller, or the installation of the AlliedSignal TPE331-10UA engine with either the Hartzell Model HC-B3TN-5/T10282 or HC-B3TN-5U/T10290N propeller; or the installation of either the AlliedSignal TPE331-11U-612G or TPE331-12UA-701G engine with the Hartzell Model HC-B5MP-5BL/LM11692N propeller.
FAA holder: Delta Turbines Inc.
SA1512WE (1 OF 2)Engine and powerplant
Installation of exhaust gas temperature monitoring systems Model EGT-1.
FAA holder: K S Avionics Inc
SA1512WE (2 OF 2)Engine and powerplant
Installation of exhaust gas temperature monitoring systems Model EGT-1.
FAA holder: K S Avionics Inc
SA01736SEEngine and powerplant
ONE-ONLY: Installation of a Pratt & Whitney R-985-AN-14B engine, a Hamilton Standard propeller having a 2D30 hub and 6101A -12 to -18 blades and a Hamilton Standard 1A2G5 propeller governor.
FAA holder: Kahle Jack.
SR00134SEEngine and powerplant
Installation of Diamond J Model 61000-012 turbine inlet temperature(T1T or T5) indicators.
FAA holder: Columbia Helicopters Inc
SR00136SEEngine and powerplant
SERIAL NUMBERS 4001, 4003, 4004, 4011, 4012 only: Installation of Diamond J Model 61000-012 turbine inlet temperature (TIT, or T5) indicators.
FAA holder: Columbia Helicopters Inc
SA00946SEEngine and powerplant
ONE-ONLY: Installation of a Honeywell TPE331-10 engine and Hartzell propeller Model HCB4TN-5NL/LT10890N, serial number 1Z024-15.
FAA holder: Turbine Dromaders LLC
SA01216SEEngine and powerplant
ONE-ONLY: Installation of a Honeywell TPE331-10UG engine and Hartzell Propeller Model HC-B4TN-5NL/LT10890N, serial number 1Z023-06.
FAA holder: Turbine Dromaders LLC
SA199GLEngine and powerplant
Installation of oil filter between engine oil gallery and propeller governor/nose case tappet rocker arm supply.
FAA holder: Barron Aviation
SA00402SEEngine and powerplant
Installation of a remote spin-on oil filter adapter. (GC-1B w/Lycoming or Cont 360 engine installed).
FAA holder: Aviation Development Corporation
SH2928NMEngine and powerplant
Installation of an improved engine electrical wiring harness on Boeing Vertol 234 with Lycoming AL5512 engines.
FAA holder: Columbia Helicopters Inc
SA02173ATEngine and powerplant
Manufacture of composite engine cowlings.
FAA holder: North Central Aircraft Products Inc.
SA240CHEngine and powerplant
Installation of Aero Crafters' exhaust heater system kit.
FAA holder: Aero Crafter Products Inc.
SA02321NYEngine and powerplant
ONE-ONLY: Install Pratt & Whitney, Canada PT6A-135A engines (modified with a dual line start fuel system ) in place of PT6A-135 engine, serial number LA-71.
FAA holder: Standard Aero Inc
SA1205NWEngine and powerplant
Installation of a digital Electronics International exhaust gas temperature (E.G.T.) gauge (P/N ET-1).
FAA holder: Aero Air, LLC
SA00246BOEngine and powerplant
Installation of a Lycoming IO-540-T4B5 engine.
FAA holder: Aerodyme Corp
SA3-160Engine and powerplant
Complete conversion of electrical system, engine and aircraft, from 12v to 24v.
FAA holder: Jerry M. Strunk
SA2706SWEngine and powerplant
Installation of 160hp Lycoming O-320-D2A, -D2B, -D2C, -D3G, or-E3D (modified in accordance with STC SE8987SW) engine.
FAA holder: RAM Aircraft Limited Partnership
SA2969SWEngine and powerplant
Installation of a 160 hp Textron Lycoming engine in the Piper Model PA-28-151.
FAA holder: RAM Aircraft Limited Partnership
SA10588SCEngine and powerplant
Installation of modified Teledyne Continental Motors IO-550-N engine equipped with turbonormalizing system.
FAA holder: Engine Technologies Inc
SA2309NYEngine and powerplant
Install Pratt & Whitney, Canada (P&WC) PT6A-135A engines (modified with a dual line start fuel system ) in place of PT6A-135 engine.
FAA holder: Standard Aero Inc
SR00120LA-DEngine and powerplant
Installation of Engine Air Induction Filters.
FAA holder: Heli-Support Inc.
SR00126LA-DEngine and powerplant
Installation of Digital Diamond J, Inc. T4 exhaust temperature indicator.
FAA holder: Heli-Support Inc.
SH296NMEngine and powerplant
Installation of Detroit Diesel Allison 250-C30P turboshaft engine and associated airframe and tail rotor control modifications similar to the model 206L-3.
FAA holder: ASI Services LLC
SA1-398Engine and powerplant
Pratt & Whitney R-985 engine installation with Simmonds Aero- cessories 580047 fuel injector.
FAA holder: Staggerwing Museum Foundation Inc.
SA1-427Engine and powerplant
Pratt & Whitney R-985 engine installation with Simmonds Aero- cessories 580047 fuel injector per STC SE1-391, and takeoff weight increase to 9,800 lbs. and landing weight to 9,400 lbs. per STC SA2-820.
FAA holder: Staggerwing Museum Foundation Inc.
SA4-113Engine and powerplant
Safety performance kit, increase gross weight to 9,000 lbs. takeoff and landing. Installation of P&W R-985-AN10, (Modified per P&W Special Instruction No. 15F-45 and eligible on C-45G, C45H, TC45G, & TC45H only), R-985-AN4 (modified per P&W Special Instruction No. 15F-45) or -AN14B Engine, associated powerplant installation changes, wheel well doors, and elevator hinge gap seals.
FAA holder: Staggerwing Museum Foundation Inc.
SE1-391Engine and powerplant
Pratt & Whitney R-985 engine and ATI fuel injection.
FAA holder: Staggerwing Museum Foundation Inc.
SA1-155Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7448 with Lycoming O-290-D2 engine.
FAA holder: McCauley Propeller Systems
SA1-156Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7446 with Lycoming O-290-D engine.
FAA holder: McCauley Propeller Systems
SA1-157Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7450 with Lycoming O-290-D engine.
FAA holder: McCauley Propeller Systems
SA1-22Engine and powerplant
McCauley fixed pitch propellers1A170/GM7459 and 1A170/GM7457 with Lycoming O-320 engine.
FAA holder: McCauley Propeller Systems
SA1-23Engine and powerplant
McCauley fixed pitch propellers1A170/GM7455 and 1A170/GM7453 with Lycoming O-290-D2 engine.
FAA holder: McCauley Propeller Systems
SA1-24Engine and powerplant
McCauley fixed pitch MET-L-PROP Models 1A170/GM7455 and 1A170/ GM7453 with Lycoming O-290-D2 engine.
FAA holder: McCauley Propeller Systems
SA1-32Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7450 and 1A170/GM7452 with Lycoming O-290-D2 engine.
FAA holder: McCauley Propeller Systems
SA1-33Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7450 and 1A170/GM7452 with Lycoming O-290-D2 engine.
FAA holder: McCauley Propeller Systems
SA1-41Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7450, 1A170/GM7452 and1A170/GM7454 propellers with Lycoming O-320-A1A engine.
FAA holder: McCauley Propeller Systems
SA1-59Engine and powerplant
McCauley fixed pitch MET-L-PROP1A170/GM7448 and 1A170/GM7450 with Lycoming O-290-D engine.
FAA holder: McCauley Propeller Systems
SA00241BOEngine and powerplant
Installation of a Lycoming IO-580-B1A engine/Hartzell HC-C3YR-1RF/F7693F or HC-M3YR-1RF/F7693F propeller.
FAA holder: Aerodyme Corp
ST01542LAEngine and powerplant
Installation of JET Engineering, LLC Jet Nozzles on the above airplane models when powered by Pratt & Whitney JT8D-217/-219 series engine in accordance with Jet Engineering Master Drawing List No. 200-1000, Rev. B, dated June 2, 2003, or later FAA approved revisions. See continuation sheet.
FAA holder: Jet Engineering LLC
SE02273NYEngine and powerplant
Conversion of a Pratt & Whitney Canada PT6A-27 or PT6A-28 engine to operate as a PT6A-34 engine.
FAA holder: Atlantic Turbines International Inc.
SR01626SEEngine and powerplant
Fabrication of AMC Part Number AM369DSK400-103, Engine Oil Hose Assembly in accordance with AMC Master Drawing List No. MDL-AMC-020, Revision IR, dated July 18, 2005, or later Federal Aviation Administration (FAA) approved revision. The Engine Oil Hose Assembly must be installed in accordance with AMC Installation Instructions AMC MI-05004, Revision IR, dated July 7, 2005, or later FAA approved revision.
FAA holder: Aerometals
SE8987SWEngine and powerplant
Modify engine IAW RAM Aircraft Corp Drawing No. 1724. Minimum fuel grade is 100/100LL.
FAA holder: RAM Aircraft Limited Partnership
SA00236BOEngine and powerplant
Installation of a Lycoming IO-580-B1A engine/Hartzell HC-C3YR-1RF/F7693F propeller. This approval is considered inadequate for duplication in other aircraft. Limited to Commander Model 114, serial no. 14405.
FAA holder: Aerodyme Corp
SA01678SEEngine and powerplant
Installation of a Lycoming O-360-A1P engine with a Hartzell HC-C2YK-1BF/F7666A propeller.
FAA holder: Steve's Aircraft
SA1634GLEngine and powerplant
Installation of a Shadin Company Engine Trend Monitor System.
FAA holder: Shadin Avionics
SA1719GLEngine and powerplant
Installation of a Shadin engine performance recorder system.
FAA holder: Shadin Avionics
SA1777GLEngine and powerplant
Installation of a Shadin engine trend monitoring system.
FAA holder: Shadin Avionics
SA4-504Engine and powerplant
Swing-out type engine mount, carburetor air heat, engine cowl, oil cooler, carburetor air scoop, and fabrication and installation of oil tank.
FAA holder: Skyhaven Inc
SA83CHEngine and powerplant
Installation of a Shadin engine trend monitor system.
FAA holder: Shadin Avionics
SA97CHEngine and powerplant
Installation of an engine trend monitor system.
FAA holder: Shadin Avionics
SH1269GLEngine and powerplant
Installation of a Shadin Company Engine Trend Monitoring System.
FAA holder: Shadin Avionics
SH1315GLEngine and powerplant
Installation of a Shadin Co. engine trend monitoring system.
FAA holder: Shadin Avionics
SH1451GLEngine and powerplant
Installation of a Shadin engine trend monitoring system.
FAA holder: Shadin Avionics
SR72CHEngine and powerplant
ONE-ONLY: Installation of a Shadin Engine Trend Monitor System.
FAA holder: Shadin Avionics
SA03281ATEngine and powerplant
Install a Power Flow Systems, Incl, tuned exhaust system.
FAA holder: Power Flow Systems Inc
SA01046CHEngine and powerplant
Installation of SMR Technologies engine inlet anti-icer models.
FAA holder: SMR Technologies Inc
ST01900LAEngine and powerplant
Installation of Meggitt Safety Systems, Inc. Engine and APU Fire Detection System Control Module Modification Kit P/N 904738.
FAA holder: Meggitt Safety Systems, Inc.
SA01249SEEngine and powerplant
ONE-ONLY: Installation of a Honeywell TPE331-10UF engine and Hartzell Propeller Model HC-B4TN-5NL/LT10890N, serial number 1Z027-08.
FAA holder: Turbine Dromaders LLC
SA01860NY (1 OF 3)Engine and powerplant
Installation of Graphic Engine Monitors (GEM) Models GEM-610 and GEMINI 1200.
FAA holder: Insight Instrument Corporation
SA01860NY (2 OF 3)Engine and powerplant
Installation of Graphic Engine Monitors (GEM) Models GEM-610 and GEMINI 1200.
FAA holder: Insight Instrument Corporation
SA01860NY (3 OF 3)Engine and powerplant
Installation of Graphic Engine Monitors (GEM) Models GEM-610 and GEMINI 1200.
FAA holder: Insight Instrument Corporation
SA7987SWEngine and powerplant
Install Garrett TPE 331-1-151A, -151G, or -151K engine and Hartzell HC-B3TN-5/T10282(-0 to +4) propeller. Approved for model G-164B (serial numbers 1 through 827B).
FAA holder: Agri Jet Power Inc
SA5491NMEngine and powerplant
Installation of engine electronic digital tachometer.
FAA holder: Horizon Instruments Inc
SA8930SWEngine and powerplant
Installation of Bizjet International Inlet Anti-ice Heat Blanket.
FAA holder: Bizjet International Sales & Support Inc
ST01006CH-DEngine and powerplant
Installation of an AlliedSignal Engines TFE731-2C Turbofan Engine.
FAA holder: Landmark Aviation
ST01051CH-DEngine and powerplant
Installation of an AlliedSignal Inc TFE731-3C/3CR Turbofan engine(s).
FAA holder: Landmark Aviation
ST0836CH-DEngine and powerplant
Installation of Honeywell N1 Digital Electronic Engine Control (DEEC).
FAA holder: Landmark Aviation
ST1445CH-DEngine and powerplant
Installation of Honeywell N1 Digital Electronic Engine Control (DEEC).
FAA holder: Landmark Aviation
SA01664SEEngine and powerplant
Installation of a Jacobs R755B2 engine, Hamilton Standard propeller with a 2B20 hub and 6135A-15 or 6135A-16 blades and associated installation components.
FAA holder: Big Sky Stearman