# TCDS E-304: Lycoming Engines - Type: Type certificate data sheet - Status: Current - Holder: Lycoming Engines - Revision: 8 - Revised: November 4, 2010 - Product: Engine - Certification basis: CAR 13 - Registered aircraft: 119, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/94/1f/941fb8a0ac4e95623103781517dcf4636d2f88d42ad51a00e2c09095e497957b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CB06D788587A78A38625780E005D1D88.0001 - Page: https://openairdocs.org/tcds/E-304 ## Models (21) As the data sheet lists them. - VO-540-B2G - VO-540-B2A - VO-540-B2D - VO-540-B1B3 - VO-540-B1D - VO-540-B1C - VO-540-B1A - VO-540-A2A - VO-540-B1B - VO-540-B2E - VO-540-B1E - VO-540-B1H3 - VO-540-C1A - VO-540-B2C - VO-540-B1F - VO-540-C2A (O-540-9) - VO-540-C2C - VO-540-C1C3 - VO-540-A1A - VO-540-C2B - VO-540-C1B ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION E-304 Revision 8 Lycoming Engines VO-540-A1A, -A2A VO-540-B1A, -B1B, -B1B3, -B1C, -B1D, -B1E, -B1F, -B1H3 VO-540-B2A, -B2C, -B2D, -B2E, -B2G VO-540-C1A, -C1B, -C1C3 VO-540-C2A (O-540-9), -C2B, -C2C November 04, 2010 TYPE CERTIFICATE DATA SHEET NO. E-304 Engines of models described herein conforming with this data sheet (which is a part of type certificate No. 304) and other approved data on file with the Federal Aviation Administration meet the minimum standards for use in certificated aircraft in accordance with pertinent aircraft data sheets and applicable portions of the Civil Air Regulations/Federal Aviation 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 AVCO Lycoming Divisi on, AVCO Corp. Williamsport PA transferred TC E-304 to Lycoming Engines, An Operating Division of AVCO Corporation on November 04, 2010 Model Lycoming VO-540-A1A, -A2A VO-540-B1A, -B1B, -B1B3, -B1C, -B1F, -B1H3, -B2A, - B2C VO-540-B1D, -B1E, -B2D, -B2E, -B2C VO-540-C1A, -C1B, -C2A, -C2B, -C2C VO-540-C1C3 Type 6HOA Vertical Mounted Direct Drive Rating Max. Continuous, hp., r.p.m., full throttle at: Sea level pressure altitude 305-3200-S.L. 305- 3200-S.L. 305- 3200-1000 ft. 315-3200-3000 ft . 305-3200-2500- ft. Takeoff (5 min.) hp., r.p.m. full throttle at: Sea level pressure altitude 310-3300-S.L. 305- 3200-S.L. 305- 3200-1000 ft. 315-3200-3000 ft. 305-3200-2500 ft. Fuel (Min. grade aviation gasoline) 100/100LL - - - - - - - - Lubricating oil See Latest Edition of Lycoming Service Instruction No. 1014 - - - - - - - - Bore and stroke, in. 5.125 x 4.375 - - - - - - - - Displacement, cu. in. 541.5 - - - - - - - - Compression ratio 7.3:1 - - - - 8.7:1 - - Weight (dry), lb. See NOTE 8 - - - - - - - - C.G. location (dry & in horizontal position) From front face of crankcase, in. 15.40 14.84 14.90 - - - - Off propeller shaft C.L., in. 0.14 above 0.09 below 0.22 below - - - - 0.24 left 0.26 left 0.26 left - - - - Propeller shaft Six-bolt flange - - - - - - - - Carburetion See NOTE 8 - - - - - - - - Ignition, dual See NOTE 8 - - - - - - - - Timing, °BTC 25 - - - - - - - - Spark plugs See NOTE 5 - - - - - - - - Oil sump capacity Dry sump - - - - - - - - NOTES 1,2,3,4,5,6,8,9 - - - - 1 thru 10 1,2,3,4,5,6,8,9 "- -" indicates "same as preceding models." "—" indicates "does not apply." Certification basis: Regulations & Amendments Model Date of Application Date Type Certificate No. E-304 Issued/Revised CAR 13 Effective June 15, 1956 As Amended by 13-1 VO-540-A1A January 30, 1958 July 24, 1958 13-2 VO-540-B1A February 23, 1959 February 27, 1959 VO-540-B1B, -B1C Septem ber 18, 1959 October 15, 1959 13-3 VO-540-B1D, -B1E June 9, 1960 June 27, 1960 VO-540-C1A, -C1B August 26, 1960 September 22, 1960 13-4 VO-540-B1B3 November 17, 1960 December 6, 1960 VO-540-A2A, -B2A, -B2C, -B2D, -B2E, -C2A, -C2B February 15, 1963 February 19, 1963 VO-540-B1F September 4, 1963 September 13, 1963 VO-540-C1C3 October 3, 1963 January 29, 1964 VO-540-B2G May 10, 1966 June 27, 1966 VO-540-C2C May 19, 1966 June 7, 1966 VO-540-B1H3 June 15, 1967 August 21, 1967 Production basis: Production Certificate No. 3 NOTE 1. Maximum permissible temperatures: -A SERIES -B, -C SERIES Cylinder head (Well type) 500°F. 500°F. Cylinder base 325°F. - - This parameter dispensed with where pistons internally cooled by oil jets. Oil inlet 235°F. - - NOTE 2. Fuel and oil pressure limits: Min. Max. Fuel pressure (-A1A) 9 p.s.i. 15 p.s.i. (B&C Series) 0.5 p.s.i. 8 p.s.i. Oil pressure (Normal operation) 55 p.s.i. 95 p.s.i. (Idling) 25 p.s.i. - - NOTE 3. The following accessory drives are provided: VO-540 Model Designation -A1A, -A2A, -B2A, -B1A -B1B, -B1B3, -B1D, -B1E, -B1F, -B2D, -B2E, -B2G, -C1A, -C1B, -C2A,- C2B, Rotation Facing Drive Speed Ratio to Crank Maximum Torque (in. lb.) Maximum Overhang Accessory Drive -B2C -B1C -B1H3 -C2C -C1C3 Pad Shaft Cont. Static (in. lb.) Starter * * * * * C 1.000:1  12,000 300 Starter, manual ** ** ** ** ** C 2.600:1 Generator (a) * * * * * C 2.600:1 500 2,200 400 Fuel pump (b) * *  * ** CC .803:1 25 450 25 Vacuum pump * * * * * C 1.219:1 200 800 25 Hydraulic pump   ** *  C 1.083:1 400 1,650 175 Tachometer * * * * * CC .500:1 7 50  (a) Inoperative as generator drive when fitted with hand crank jaw. (b) Accessory housing machined for drive. Drive supplied on standard engine, except for models -B1B, -B1B3 and -B1H3. * Standard ** Optional "C" - Clockwise, "CC" - Counter-clockwise NOTE 4. These engines are approved for helicopter app lication and operation in a vertical installation. NOTE 5. Spark plugs approved for use on these engines are listed in the latest revision of Lycoming Service Instruction No. 1042. NOTE 6. The following engines incorporate the additional detailed characteristics: VO-540 Model -A1A Basic Model. Six cylinder, horizonta lly opposed, air cooled dry sump, vertical direct drive engine with side mounted, AN type accessory drives and automatic altitude mixture control, pressure type carburetor. Incorporates internal piston cooling oil jets. -B1A Similar to -A1A except incorporating float type carburetor and reduced takeoff rating. -B1B Similar to -B1A except incorporati ng retard breaker magnetos and less fuel pump and hydraulic pump drives. -B1B3 Similar to -B1B except incorpor ating six (6) third order counterweights. -B1C Similar to -B1A except in corporating retard breaker magnetos. -B1D Similar to -B1C except incorporati ng two (2) MA-6-AA carburetors and 1,000 ft. rating. -B1E Similar to -B1A except incorporati ng two (2) MA-6-AA carburetors and 1,000 ft. rating. -B1F Similar to -B1B except incorporates fuel and hydraulic pump drives as standard equipment. -B1H3 Similar to -B1B3 but has TCM+ 1200 series high altitude magnetos. -C1A Similar to -B1D except incorpora ting high compression pistons and 3,000 ft. rating. -C1B Similar to -C1A except inco rporating impulse coupling magnetos. -C1C3 Similar to -B1B3 except has dual MA-6- AA carburetors, inconel exhaust valves and ni- resist valve guides. -A2A, -B2A, -B2C, -B2D, Similar to -A1A, -B1A, -B1C, -B1D, -B1E, -C1A, -C1B respectively except -B2E, -C2A, -C2B incorporating spring coupling assembly in accessory drive section. -B2G Same as -B2D except has TCM+ 1200 series high altitude magnetos. -C2C Same as -C2A except has TCM+ 1200 series high altitude magnetos. NOTE 7. Military model 0-540-9 is equivalent to civil model VO-540-C2A. When installed in certificated aircraft, the corresponding civil model designation and type certificate number should be added to the engine data plate. NOTE 8. Weights, carburetion and ignition: VO-540 Models Weight (dry), lb. Carburetion ** Ignition, dual+ -A1A 435 PAC# PS-7BD TCM S6LN-20, S6RN-21 -A2A 438 PAC# PS-7BD TCM S6LN-20, S6RN-21 -B1A 430 Marvel-Schebler* MA-6-AA TCM S6LN-20, S6RN-21 -B1B 429 Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B1B3 444 Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B1C 430 Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B1D 439 (2) Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B1E 439 (2) Marvel-Schebler* MA-6-AA TCM S6RN-21, S6LN-20 -B1F 430 Marvel-Schebler* MA-6-AA TCM S6RN-200, S4LN-204 -B1H3 445 Marvel-Schebler* MA-6-AA TCM S6RN-1208, S6LN-1209 B2A 433 Marvel-Schebler* MA-6-AA TCM S6LN-20, S6RN-21 -B2C 433 Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B2D 442 (2) Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -B2E 442 (2) Marvel-Schebler* MA-6-AA TCM S6RN-21, S6LN-20 -B2G 443 (2) Marvel-Schebler* MA-6-AA TCM S6LN-1209, S6RN-1208 -C1A 441 (2) Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -C1B 441 (2) Marvel-Schebler* MA-6-AA TCM S6RN-21, S6LN-20 -C1C3 453 (2) Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -C2A 444 (2) Marvel-Schebler* MA-6-AA TCM S6RN-200, S6LN-204 -C2B 444 (2) Marvel-Schebler* MA-6-AA TCM S6RN-21, S6LN-20 -C2C 445 (2) Marvel-Schebler* MA-6-AA TCM S6LN-1209, S6RN-1208 + TCM Formerly Bendix **See latest edition of Lycoming SI 1523 for alternate approved Carburetors * Marvel-Schebler formerly Volare, Precision Airmotive Corporation, Facet Aerospace Products Company, and Borg Warner Corporation # PAC Formerly Bendix NOTE 9. These engines are not equipped w ith crankshaft dampers unless the number "3" is shown in the rear of model designation. Models so shown, i.e., "B1B3", incorporate six (6) third order crankshaft dampers. NOTE 10. The models VO-540-C1A, -C2A , -C1B, -C2A, -C2C have an alternate rating of 305 hp. at 3200 RPM. .....END..... ``` ## ADs (15, 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 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022 - [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 89-04-02](https://openairdocs.org/ad/89-04-02): Carburetors · Continental Motors O-470-11, O-470-11-CI, O-470-11B and 175 more. Effective Mar 8, 1989 - [AD 80-04-04 R1](https://openairdocs.org/ad/80-04-04-R1): Crankshaft Flange Bolts · Lycoming Engines IVO-540-A1A, TIVO-540-A2A, TVO-435-A1A and 38 more. Effective Aug 18, 1980 - [AD 73-23-01](https://openairdocs.org/ad/73-23-01): Piston Pin Assembly · Lycoming Engines AIO-360-A1A, AIO-360-A1B, AIO-360-A2A and 215 more. Effective Jan 13, 1977 - [AD 73-05-01](https://openairdocs.org/ad/73-05-01): Connecting Rod Bearing Assemblies · Lycoming Engines IVO-540-A1A, TIVO-540-A2A, TVO-540-A1A and 21 more. Effective Jul 9, 1974 - [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969 - [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 68-08-08](https://openairdocs.org/ad/68-08-08): Hydraulic Valve · Lycoming Engines IGSO-480-A1A6, IGSO-480-A1B6, IGSO-480-A1C6 and 44 more. Effective May 19, 1968 - [AD 62-03-02](https://openairdocs.org/ad/62-03-02): Hydraulic Valve Tappet Body and Plunger Assembly · Lycoming Engines VO-540-A1A, VO-540-B1A, VO-540-B1B and 6 more. Effective Feb 27, 1962 - [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 ## Registered aircraft by registry model (OpenAirDocs) - [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series): 110 aircraft (registry codes 41534, 41582) - [Lycoming VO-540-C2A](https://openairdocs.org/engine/lycoming-vo-540-c2a): 6 aircraft (registry code 42244) - [Lycoming VO-540-B1B3](https://openairdocs.org/engine/lycoming-vo-540-b1b3): 3 aircraft (registry code 42232) - [Lycoming VO-540-A1A](https://openairdocs.org/engine/lycoming-vo-540-a1a): 0 aircraft (registry code 42228) - [Lycoming VO-540-A2A](https://openairdocs.org/engine/lycoming-vo-540-a2a): 0 aircraft (registry code 42229) - [Lycoming VO-540-B1A](https://openairdocs.org/engine/lycoming-vo-540-b1a): 0 aircraft (registry code 42230) - [Lycoming VO-540-B1B](https://openairdocs.org/engine/lycoming-vo-540-b1b): 0 aircraft (registry code 42231) - [Lycoming VO-540-B1C](https://openairdocs.org/engine/lycoming-vo-540-b1c): 0 aircraft (registry code 42233) - [Lycoming VO-540-B1D](https://openairdocs.org/engine/lycoming-vo-540-b1d): 0 aircraft (registry code 42238) - [Lycoming VO-540-B1E](https://openairdocs.org/engine/lycoming-vo-540-b1e): 0 aircraft (registry code 42239) - [Lycoming VO-540-B1F](https://openairdocs.org/engine/lycoming-vo-540-b1f): 0 aircraft (registry code 42234) - [Lycoming VO-540-B1H3](https://openairdocs.org/engine/lycoming-vo-540-b1h3): 0 aircraft (registry code 42235) - [Lycoming VO-540-B2A](https://openairdocs.org/engine/lycoming-vo-540-b2a): 0 aircraft (registry code 42236) - [Lycoming VO-540-B2C](https://openairdocs.org/engine/lycoming-vo-540-b2c): 0 aircraft (registry code 42237) - [Lycoming VO-540-B2D](https://openairdocs.org/engine/lycoming-vo-540-b2d): 0 aircraft (registry code 42240) - [Lycoming VO-540-B2E](https://openairdocs.org/engine/lycoming-vo-540-b2e): 0 aircraft (registry code 42241) - [Lycoming VO-540-C1A](https://openairdocs.org/engine/lycoming-vo-540-c1a): 0 aircraft (registry code 42242) - [Lycoming VO-540-C1B](https://openairdocs.org/engine/lycoming-vo-540-c1b): 0 aircraft (registry code 42243) - [Lycoming VO-540-C1C3](https://openairdocs.org/engine/lycoming-vo-540-c1c3): 0 aircraft (registry code 42247) - [Lycoming VO-540-C2B](https://openairdocs.org/engine/lycoming-vo-540-c2b): 0 aircraft (registry code 42245) - [Lycoming VO540-C2C](https://openairdocs.org/engine/lycoming-vo540-c2c): 0 aircraft (registry code 42246) ## STCs approved under this data sheet (22) - [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 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 SE2902NM](https://openairdocs.org/stc/SE2902NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [STC SE7582SW](https://openairdocs.org/stc/SE7582SW): Grinding of high compression NITRIDED Cylinders to .010 oversize, as an alternative to chrome plating or rebarreling, and the installation of SL10207 P10 Piston, SL74241 P10 Top and second compression ring, and SL 73857 P10 oil control 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 SE00890LA](https://openairdocs.org/stc/SE00890LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models.. Nickson's Machine Shop 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 SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector.. Aviation Development Corporation - [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 SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines.. Perrigo & Steele Aircraft Engr Company - [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 - [STC SE44WE](https://openairdocs.org/stc/SE44WE): Use of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines.. Kling Oil Company --- 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.