# Lycoming LTO-360-A1A6D - Type: Engine model (FAA registry) - Registry code: 42021 - Manufacturer (registry): LYCOMING - Model: LTO-360-A1A6D - Engine type: Reciprocating - Power: 196 hp - Data sheet: [TCDS E26EA](https://openairdocs.org/tcds/E26EA) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 0 registered aircraft - Page: https://openairdocs.org/engine/lycoming-lto-360-a1a6d Model codes come from the FAA registry's reference file. ## ADs that may apply (OpenAirDocs) Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [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 2023-09-09](https://openairdocs.org/ad/2023-09-09): Exhaust Turbine System (Recip) · Aerostar PA-60-600 (Aerostar 600), PA-60-601 (Aerostar 601), PA-60-601P (Aerostar 601P) and 292 more. Effective Jul 17, 2023 - [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 2009-26-12](https://openairdocs.org/ad/2009-26-12): Cylinder assemblies · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 264 more. Effective Feb 4, 2010 - [AD 2006-12-07](https://openairdocs.org/ad/2006-12-07): ECi cylinder assemblies · Aerostar AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 386 more. Effective Jul 11, 2006 - [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 2002-12-07](https://openairdocs.org/ad/2002-12-07): Oil Filter Converter Plate Gasket or the Converter Plate Kit · Lycoming Engines HIO-360-E1AD, HIO-360-E1BD, HIO-360-F1AD and 95 more. Effective Jul 3, 2002 - [AD 98-02-08](https://openairdocs.org/ad/98-02-08): Crankshaft · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 216 more. Effective Mar 30, 1998 - [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 96-09-10](https://openairdocs.org/ad/96-09-10): Oil pump · Lycoming Engines AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 334 more. Effective Jul 15, 1996 - [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 Historical (superseded or no longer in force): - [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 2000-18-53](https://openairdocs.org/ad/2000-18-53) (historical): Oil Filter Converter Plate Gaskets · Textron Lycoming, AVCO AEIO-540, IO-360-A1B6D, IO-360-A1D6D and 73 more - [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 ## Information bulletins (advisory) (3) - [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019 - [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014 - [SAIB NE-08-26R3](https://openairdocs.org/saib/NE-08-26R3): Magneto/Distributor. Issued Mar 31, 2011 ## Registered aircraft None registered with this engine model now. ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports None matched to aircraft with this engine model. ## STCs that may be installed (OpenAirDocs) (17) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company - [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc - [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines. B & C Specialty Products Inc - [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. Lists LTO-360 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists LTO-360 Series - [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. Lists LTO-360 Series - [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. Lists LTO-360 Series - [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. Lists LTO-360 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists LTO-360 Series - [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. Lists LTO-360 Series - [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. Lists LTO-360 Series - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists LTO-360 Series ## PMA parts (OpenAirDocs) (over 1,000, first 50) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first. - [OC](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178549155320250923184433.0001): Oil Cooler Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Sep 12, 2025 - [SL4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199637784520250923185920.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [TXPL4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID124596913420250923185922.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [HSS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104096221220250923185925.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [AA48104-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156575247020240813134135.0001): Oil Filter. Aero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48104Champion… · Jul 12, 2024 - [TA2925-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193237775520231109132301.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Oct 30, 2023 - [TA2925-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176004176820231109132302.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Oct 30, 2023 - [ES-4019LS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185701279720220916174121.0001): Alternator Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lycoming 32C21420 · Aug 3, 2022 - [MHB‐4020](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177843306220220916164355.0001): Starter Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lycoming LW-18990 · May 16, 2022 - [MHB-4016](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID154657633320220916164352.0001): Starter Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lycoming LW-15572 · May 16, 2022 - [ALU-8532LS](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116456604120220916095402.0001): Alternator Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Lycoming 32C21997 · May 3, 2022 - [SL-STD-1065 P002](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID740516129120210823172410.0001): Dowel, Stepped. Superior Air Parts Inc · PMA PQ0060SW · Replaces STD-1065-P02 · May 10, 2021 - [SL-STD-1204](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID727910962021082317381001.0001): Bolt. Superior Air Parts Inc · PMA PQ0060SW · Replaces STD-1204 · May 5, 2021 - [SL-STD-1925](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID623876214320210823173811.0001): Screw. Superior Air Parts Inc · PMA PQ0060SW · Replaces STD-1925 · May 5, 2021 - [SL31CD-17 P003](https://drs.faa.gov/browse/excelExternalWindow/F659E4EB8DB01695862585FB0034F5D9.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-17-P03 · Oct 6, 2020 - [SL31CD-16 P012](https://drs.faa.gov/browse/excelExternalWindow/F266CA7E477307DC862585FB0034F5A4.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-16-P12 · Oct 6, 2020 - [SL31CD-13 P012](https://drs.faa.gov/browse/excelExternalWindow/E656978A9DBFB875862585FB0034F397.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-13-P12 · Oct 6, 2020 - [SL31CD-8 P003](https://drs.faa.gov/browse/excelExternalWindow/CAF2AF0E913FE9BD862585FB0034EF24.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-8-P03 · Oct 6, 2020 - [SL31CD-12 P007](https://drs.faa.gov/browse/excelExternalWindow/C54ACF40782DEBC8862585FB0034F27F.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-12-P07 · Oct 6, 2020 - [SL31CD-16 P007](https://drs.faa.gov/browse/excelExternalWindow/BF0A4986950E56BF862585FB0034F569.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-16-P07 · Oct 6, 2020 - [SL31CD-9 P003](https://drs.faa.gov/browse/excelExternalWindow/B9F7D60B38AEE8DF862585FB0034F034.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-9-P03 · Oct 6, 2020 - [SL31CD-9 P012](https://drs.faa.gov/browse/excelExternalWindow/B1D44CBED84E8BAB862585FB0034F0B2.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-9-P12 · Oct 6, 2020 - [SL31CD-17 P012](https://drs.faa.gov/browse/excelExternalWindow/AAC574021811F7CE862585FB0034F64F.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-17-P12 · Oct 6, 2020 - [SL31CD-14 P007](https://drs.faa.gov/browse/excelExternalWindow/A90ED71F550BACC8862585FB0034F411.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-14-P07 · Oct 6, 2020 - [SL31CD-14 P003](https://drs.faa.gov/browse/excelExternalWindow/A13F7190860A5D16862585FB0034F3D2.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-14-P03 · Oct 6, 2020 - [SL31CD-10 P007](https://drs.faa.gov/browse/excelExternalWindow/909ECAA97B419CBC862585FB0034F131.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-10-P07 · Oct 6, 2020 - [SL31CD-11 P007](https://drs.faa.gov/browse/excelExternalWindow/85D88C32D876EA1A862585FB0034F1E3.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-11-P07 · Oct 6, 2020 - [SL31CD-19 P007](https://drs.faa.gov/browse/excelExternalWindow/84E2AF0EBBEC6946862585FB0034F760.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-19-P07 · Oct 6, 2020 - [SL31CD-18 P003](https://drs.faa.gov/browse/excelExternalWindow/83C21036C578A11E862585FB0034F685.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-18-P03 · Oct 6, 2020 - [SL31CD-17 P007](https://drs.faa.gov/browse/excelExternalWindow/7CD6BAAF107F8D1C862585FB0034F61B.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-17-P07 · Oct 6, 2020 - [SL31CD-11 P012](https://drs.faa.gov/browse/excelExternalWindow/61B9AA1F8A4F064A862585FB0034F216.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-11-P12 · Oct 6, 2020 - [SL31CD-12 P003](https://drs.faa.gov/browse/excelExternalWindow/610CC23D8A41275E862585FB0034F24A.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-12-P03 · Oct 6, 2020 - [SL31CD-18 P007](https://drs.faa.gov/browse/excelExternalWindow/5C12B8DDD82D9281862585FB0034F6BC.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-18-P07 · Oct 6, 2020 - [SL31CD-15 P007](https://drs.faa.gov/browse/excelExternalWindow/5A14FE3AEE830F88862585FB0034F4C3.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-15-P07 · Oct 6, 2020 - [SL31CD-15 P012](https://drs.faa.gov/browse/excelExternalWindow/4E3376F54122A5E7862585FB0034F4FB.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-15-P12 · Oct 6, 2020 - [SL31CD-12 P012](https://drs.faa.gov/browse/excelExternalWindow/4E2CCD6B7D09F406862585FB0034F2CD.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-12-P12 · Oct 6, 2020 - [SL31CD-19 P012](https://drs.faa.gov/browse/excelExternalWindow/4A7F1CEBDC2B2B15862585FB0034F797.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-19-P12 · Oct 6, 2020 - [SL31CD-18 P012](https://drs.faa.gov/browse/excelExternalWindow/479EDD643567685C862585FB0034F6F1.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-18-P12 · Oct 6, 2020 - [SL31CD-10 P012](https://drs.faa.gov/browse/excelExternalWindow/4743668405E3D15B862585FB0034F164.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-10-P12 · Oct 6, 2020 - [SL31CD-9 P007](https://drs.faa.gov/browse/excelExternalWindow/4488E7B00B7501F0862585FB0034F074.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-9-P07 · Oct 6, 2020 - [SL31CD-8 P012](https://drs.faa.gov/browse/excelExternalWindow/436383DD3B3D8363862585FB0034EFD6.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-8-P12 · Oct 6, 2020 - [SL31CD-13 P003](https://drs.faa.gov/browse/excelExternalWindow/3E1B69414595A42C862585FB0034F30D.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-13-P03 · Oct 6, 2020 - [SL31CD-13 P007](https://drs.faa.gov/browse/excelExternalWindow/32FD75DFFAD35481862585FB0034F351.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-13-P07 · Oct 6, 2020 - [SL31CD-15 P003](https://drs.faa.gov/browse/excelExternalWindow/1BF381BEEEB593B2862585FB0034F48E.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-15-P03 · Oct 6, 2020 - [SL31CD-8 P007](https://drs.faa.gov/browse/excelExternalWindow/1A508ECE8D5AB582862585FB0034EF89.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-8-P07 · Oct 6, 2020 - [SL31CD-16 P003](https://drs.faa.gov/browse/excelExternalWindow/18A0A55968579686862585FB0034F535.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-16-P03 · Oct 6, 2020 - [SL31CD-19 P003](https://drs.faa.gov/browse/excelExternalWindow/154F8554D4C3BC96862585FB0034F725.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-19-P03 · Oct 6, 2020 - [SL31CD-14 P012](https://drs.faa.gov/browse/excelExternalWindow/07DCD7FAD92CAC59862585FB0034F451.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-14-P12 · Oct 6, 2020 - [SL31CD-11 P003](https://drs.faa.gov/browse/excelExternalWindow/04AD064349964D9D862585FB0034F1AF.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-11-P03 · Oct 6, 2020 - [SL31CD-10 P003](https://drs.faa.gov/browse/excelExternalWindow/0378D9605645B1E6862585FB0034F0F2.0001): Stud, 5/16 IN DIA, Coarse Thread. Superior Air Parts Inc · PMA PQ0060SW · Replaces 31CD-10-P03 · Oct 6, 2020 All of them: https://openairdocs.org/engine/lycoming-lto-360-a1a6d/pma.md --- 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.