# TCDS E-277: Lycoming Engines - Type: Type certificate data sheet - Status: Current - Holder: Lycoming Engines - Revision: 6 - Revised: November 4, 2010 - Product: Engine - Certification basis: CAR 13 - Registered aircraft: 81, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/20/bf/20bff1517a02ecb0606bfd58e3db7e06674deab0466284f01c1ae8dfa6b4d6b8 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ACFC7B7BEFFE251E8625780E005B3BB6.0001 - Page: https://openairdocs.org/tcds/E-277 ## Models (3) As the data sheet lists them. - O-340-A2A - O-340-B1A - O-340-A1A ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text Page No. 1 2 3 Rev. No. 6 5 6 DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION E-277 Revision 6 Lycoming Engines O-340-A1A O-340-A2A O-340-B1A November 04, 2010 TYPE CERTIFICATE DATA SHEET NO. E-277 Engines of models described herein conforming with this data sheet (which is a part of type certificate No. 277) and other approved data on file with the Federal Aviation Agency meet the minimum standards for use in certificated aircraft in accordance with pertinent aircraft data sheets and applicable portions of the Civil Air Regulations provided they are installed, operated and maintained as prescribed by the approved manufacturer’s manuals and other approved instructions. Type Certificate Holder Lycoming Engines An Operating Division of AVCO Corporation Williamsport, Pennsylvania 17701 Type Certificate Holder Record Lycoming Division, AVCO Manufacturing Corporation Williamsport, PA. transferred TC E-277 to Lycoming Engines, An Operating Division of AVCO Corporation on November 04, 2010 Model Lycoming O-340-A1A, -A2A O-340-B1A Type 4HOA Rating Max. continuous, hp., r.p.m., full throttle at: Sea level pressure altitude 170-2700 160-2700 Takeoff (5 min.) hp., r.p.m., full throttle at:\ Sea level pressure altitude 170-2700 160-2700 Fuel (Min. grade aviation gasoline) 91/96 80/87 Bore and stroke, in. 5.125 x 4.125 5.125 x 4.125 Displacement, cu.in. 340.4 - - Compression ratio 8.5:1 7.15:1 Weight (dry), lb. 250 247 C. G. location with starter and generator From face of propeller mounting flangs, in. 14.20 14.26 Off propeller shaft C.L., in. 1.39 Belo w & .20 Left 1.35 Below & .06 Right Propeller shaft Integral flanged hub SAE 2 - - Carburetion++ Marvel-Schebler+ MA-4-5 - - Ignition, Dual TCM* S4LN-20 and - - S4LN-21 magneto - - Ignition timing, BTC 25 - - Spark plugs See NOTE 4 - - Oil sump capacity, qt. 8 - - Usable oil sump capacity, qt. 6 - - NOTES 1,2,3,4,5, 6 1,2,3,4,5,6 “- -” indicates “same as preceding model.” “—” indicates “does not apply.” + Marvel-Schebler formerly Volare, Precision Airmotive Corporation, Facet Aerospace Products Company, and Borg Warner Corp ++ For alternate carburetors see latest edition of Lycoming Service Instruction 1523 * TCM formerly Bendix Certification basis: Date Type Certificate Regulation & Amendments Model(s) Date of Application E-277 Issued/Revised CAR 13,effective March 5, 1952 & 13-1 O-340 March 30, 1954 July 20, 1954 13-1 & 13-2 O-340-A1A Sept.22, 1954 Jan.13, 1955 Changed model Letter Aug.22, 1956 Sept. 27, 1956 designation filed 641.3 Lycoming O-340 to O-340-B1A O-340 CAR 13 as amended to June 15, 1956 O-340-A2A Nov.5, 1956 Nov. 16, 1956 Production basis Production Certificate No. 3 NOTE 1. Maximum permissible temperatures are as follows: Cylinder head 500 F (Wall-type thermocouple) Cylinder barrel 325 F Oil inlet 245 F NOTE 2. Fuel pressure limits: Minimu m 0.5 p.s.i. - Maximum 6 p.s.i. Oil pressure limits: (Normal operation) Minimum 60 p.s.i. - Maximum 85 p.s.i. (Idling 25 p.s.i.) Starting and warm-up - 100 p.s.i. NOTE 3. The following accessory drive provisions are available: *Direction of Maximum Torque Maximum Overhand Accessory Rotation **Speed (in. - lb.) Moment (in.-lb.) Cont. Static Starter CC 13.556:1 — 450 150 Starter(Optional) CC 16.556:1 — 450 150 Generator C 1.910:1 60 120 175 Generator(Optional) C 2.500:1 60 120 175 Fuel Pump or Plunger operated .500:1 — — 10 Fuel Pump C 1.000:1 25 450 25 Vac.Pump CC 1.300:1 70 450 25 Tachometer C .500:1 7 50 5 Prop.Gov. C .866:1 125 825 25 In addition, the following optional dual drives mounting on engine vacuum pump drive pad: Vac. pump CC 1.300:1 70 450 6 Hydraulic pump or CC 1.300:1 Total Total 10 Vac. pump CC 1.300:1 70 450 6 Propeller governor CC 1.300:1 Total Total 10 *”C” - Clockwise, “CC” - Count er clockwise facing engine pad **Speed - Times crankshaft r.p.m. 3 E-277 NOTE 4. Spark Plugs: See latest revision of Lycomi ng Service Instruction No. 1042 for approved equipment. NOTE 5. These engines incorporate provisions for absorbing pr opeller thrust in both tractor and pusher type installations. NOTE 6. The above models incorporate additional characteristics as follows: O-340 Models Characteristics O-340-A1A Basic Model O-340-A2A Same as O-340-A1A except has no provision for hydraulic propeller control. O-340-B1A Same as O-340-A1A except has 7.15:1 compression ratio and 160 hp. rating on grade 80/87 fuel. ...END... ``` ## ADs (13, in force first) - [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026 - [AD 2012-03-07](https://openairdocs.org/ad/2012-03-07): Carburetor · Lycoming Engines GO-435, GO-435-C2 (O-435-17), GO-435-C2A and 389 more. Effective Mar 27, 2012 - [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004 - [AD 97-15-11](https://openairdocs.org/ad/97-15-11): Cylinder kits · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 538 more. Effective Aug 12, 1997 - [AD 92-12-05](https://openairdocs.org/ad/92-12-05): Piston Pins · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 532 more. Effective Jul 10, 1992 - [AD 90-04-06 R1](https://openairdocs.org/ad/90-04-06-R1): Propeller Governor External Oil Line · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 427 more. Effective May 28, 1991 - [AD 87-10-06 R1](https://openairdocs.org/ad/87-10-06-R1): Rocker Arm Assembly · Lycoming Engines IO-360-B4, IVO-360-A1A, O-340-A1A and 243 more. Effective Sep 1, 1989 - [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969 - [AD 66-20-04](https://openairdocs.org/ad/66-20-04): Oil Filter Adapter Gasket · Lycoming Engines IO-320-A1A, IO-320-A2A, IO-320-B1A and 121 more. Effective Aug 27, 1966 - [AD 64-16-05](https://openairdocs.org/ad/64-16-05): AC Pumps · Lycoming Engines HIO-360-B1A, HIO-360-B1B, IO-320-B1A and 86 more. Effective Jul 10, 1964 - [AD 59-10-07](https://openairdocs.org/ad/59-10-07): Cylinder Baffle Clamps · Lycoming Engines GO-480-A1A, GO-480-B, GO-480-B1A6 and 58 more - [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024 - [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982 ## Registered aircraft by registry model (OpenAirDocs) - [Lycoming 0-340 series](https://openairdocs.org/engine/lycoming-0-340-series): 60 aircraft (registry code 41510) - [Titan O-340](https://openairdocs.org/engine/titan-o-340-series): 13 aircraft (registry code 59691) - [Lycoming O-340-A1A](https://openairdocs.org/engine/lycoming-o-340-a1a): 5 aircraft (registry code 42192) - [Eci O-340](https://openairdocs.org/engine/eci-o-340-series): 2 aircraft (registry code 24703) - [Lycoming O-340-B1A](https://openairdocs.org/engine/lycoming-o-340-b1a): 1 aircraft (registry code 42194) - [Lycoming O-340-A2A](https://openairdocs.org/engine/lycoming-o-340-a2a): 0 aircraft (registry code 42193) ## STCs approved under this data sheet (18) - [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC - [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive.. Alcor LLC - [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd. - [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal.. Ly-Con Rebuilding Company - [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc. - [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. - [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters.. Cygnet Aerospace Corp - [STC SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts.. Continental Motors, Inc. - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings.. Continental Motors, Inc. - [STC SE8193SW](https://openairdocs.org/stc/SE8193SW): Grind nitriden high compression cylinder barrles to plus .010 oversize and install SL75089 P10 piston, SL74242 P10 compression ring, and SL73857 P10 oil ring.. Superior Air Parts Inc. - [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc - [STC SE1-201](https://openairdocs.org/stc/SE1-201): Installation of the Richter Aero Equipment Type B-4 or B-5 Temperature Probe. (O-360 SERIES (excl. A1C, C2B, C2D)). MidContinent Instru Co Inc - [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013.. Exxon Company USA - [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil.. Mobil Research & Development Corp - [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.. Phillips Petroleum Co - [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less.. Bel-Ray Company, Inc - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines.. AMS/OIL --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.