# Lycoming O-360-A4K - Type: Engine model (FAA registry) - Registry code: 42275 - Manufacturer (registry): LYCOMING - Model: O-360-A4K - Engine type: Reciprocating - Power: 180 hp - Data sheet: [TCDS E-286](https://openairdocs.org/tcds/E-286) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 44 registered aircraft - Page: https://openairdocs.org/engine/lycoming-o-360-a4k 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 2017-16-11](https://openairdocs.org/ad/2017-16-11): Reciprocating Engine Power Section · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-360-B1G6 and 93 more. Effective Aug 15, 2017 - [AD 2012-19-01](https://openairdocs.org/ad/2012-19-01): Crankshafts · Lycoming Engines AEIO-360-A1A, AEIO-360-A1B, AEIO-360-A1B6 and 321 more. Effective Oct 24, 2012 - [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 2007-04-19 R1](https://openairdocs.org/ad/2007-04-19-R1): SAP cylinder assemblies · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 314 more. Effective May 7, 2007 - [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 2006-10-21](https://openairdocs.org/ad/2006-10-21): ECi connecting rods · Engine Components Reciprocating Engine Connecting Rods, AEIO-360-B1B, AEIO-360-B1D and 171 more. Effective Jun 22, 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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 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 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996 - [AD 95-07-01](https://openairdocs.org/ad/95-07-01): Connecting Rod Bolt · Lycoming Engines AEIO-360-A1E, AEIO-360-B1G6, AEIO-360-H1A and 177 more. Effective Apr 12, 1995 - [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 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 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981 - [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980 - [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977 - [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 67-01-04](https://openairdocs.org/ad/67-01-04): Oil Filters · Full flow oil filter (Superior Flow STC SA401SW or 2 others). Effective Jan 2, 1967 - [AD 63-22-03](https://openairdocs.org/ad/63-22-03): Carburetors · Continental Motors GO-300-A, GO-300-B, GO-300-C and 143 more. Effective Dec 2, 1963 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 2008-19-05](https://openairdocs.org/ad/2008-19-05) (historical): Parallel Valve'' reciprocating engines · Engine Components Reciprocating Engine Cylinder Assemblies, AEIO-320-D1B, AEIO-320-D2B and 262 more. Effective Oct 20, 2008 - [AD 2005-26-10](https://openairdocs.org/ad/2005-26-10) (historical): ECi cylinder assemblies. · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 413 more. Effective Jan 31, 2006 - [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) (6) - [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-08-32R1](https://openairdocs.org/saib/NE-08-32R1): Propeller Governor Idler Gear Shaft Set Screw. Issued May 13, 2016 - [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014 - [SAIB NE-13-06](https://openairdocs.org/saib/NE-13-06): Pushrod Shroud Spring Retainers, Engine Components Part No. AEL14995, for Lycoming Engines 320, 360, and 540 Series Engines. Issued Nov 21, 2012 - [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008 - [SAIB NE-08-32](https://openairdocs.org/saib/NE-08-32) (historical): Propeller Governor Set Screw. Issued Jul 3, 2008 ## Registered aircraft (44) - [N1007C](https://openairdocs.org/aircraft/N1007C): [Vee Two Inc](https://openairdocs.org/faa-owner/VEE%20TWO%20INC), [Merritt Island, FL](https://openairdocs.org/faa-place/FL/Merritt%20Island), built 1992, S/N 10089 - [N111LA](https://openairdocs.org/aircraft/N111LA): [Ammons Curtis D](https://openairdocs.org/faa-owner/AMMONS%20CURTIS%20D), [Hernando, MS](https://openairdocs.org/faa-place/MS/Hernando), built 1976, S/N AA5B-0249 - [N133U](https://openairdocs.org/aircraft/N133U): [Orion Future Data LLC](https://openairdocs.org/faa-owner/ORION%20FUTURE%20DATA%20LLC), [Sarasota, FL](https://openairdocs.org/faa-place/FL/Sarasota), built 1993, S/N 10165 - [N1420](https://openairdocs.org/aircraft/N1420): [N5504r LLC](https://openairdocs.org/faa-owner/N5504R%20LLC), [Jefferson City, MO](https://openairdocs.org/faa-place/MO/Jefferson%20City), built 1993, S/N 10172 - [N148RR](https://openairdocs.org/aircraft/N148RR): [Dunbar Richard](https://openairdocs.org/faa-owner/DUNBAR%20RICHARD), [El Dorado Hills, CA](https://openairdocs.org/faa-place/CA/El%20Dorado%20Hills), built 1978, S/N AA5B-1008 - [N14YU](https://openairdocs.org/aircraft/N14YU): [International Air Services Inc Trustee](https://openairdocs.org/faa-owner/INTERNATIONAL%20AIR%20SERVICES%20INC%20TRUSTEE), [Carson City, NV](https://openairdocs.org/faa-place/NV/Carson%20City), built 1992, S/N 10135 - [N16PX](https://openairdocs.org/aircraft/N16PX): [Smith Howard Michael](https://openairdocs.org/faa-owner/SMITH%20HOWARD%20MICHAEL), [Wynne, AR](https://openairdocs.org/faa-place/AR/Wynne), built 1979, S/N AA5B1079 - [N174BN](https://openairdocs.org/aircraft/N174BN): [Stropki Timothy P](https://openairdocs.org/faa-owner/STROPKI%20TIMOTHY%20P), [North Benton, OH](https://openairdocs.org/faa-place/OH/North%20Benton), built 2007, S/N 70815 - [N23HK](https://openairdocs.org/aircraft/N23HK): [Maine Instrument Flight](https://openairdocs.org/faa-owner/MAINE%20INSTRUMENT%20FLIGHT), [Augusta, ME](https://openairdocs.org/faa-place/ME/Augusta), built 1977, S/N M-1911 - [N254L](https://openairdocs.org/aircraft/N254L): [Weekley Marlin G](https://openairdocs.org/faa-owner/WEEKLEY%20MARLIN%20G), [Metamora, IL](https://openairdocs.org/faa-place/IL/Metamora), built 2007, S/N 8-3956 - [N267MT](https://openairdocs.org/aircraft/N267MT): [Plane Fun Inc Tr Trustee](https://openairdocs.org/faa-owner/PLANE%20FUN%20INC%20TR%20TRUSTEE), [Snellville, GA](https://openairdocs.org/faa-place/GA/Snellville), built 1974, S/N 0005 - [N28423](https://openairdocs.org/aircraft/N28423): [Brown Robert](https://openairdocs.org/faa-owner/BROWN%20ROBERT), [Homestead, FL](https://openairdocs.org/faa-place/FL/Homestead), built 1977, S/N AA5B0605 - [N28534](https://openairdocs.org/aircraft/N28534): [Johnston Alan](https://openairdocs.org/faa-owner/JOHNSTON%20ALAN), [Michigan City, IN](https://openairdocs.org/faa-place/IN/Michigan%20City), built 1977, S/N AA5B0663 - [N28747](https://openairdocs.org/aircraft/N28747): [Vogt Gary L](https://openairdocs.org/faa-owner/VOGT%20GARY%20L), [Auburn, CA](https://openairdocs.org/faa-place/CA/Auburn), built 1978, S/N AA5B0790 - [N296HL](https://openairdocs.org/aircraft/N296HL): [Mcclanahan Edward A](https://openairdocs.org/faa-owner/MCCLANAHAN%20EDWARD%20A), [Apo, AE](https://openairdocs.org/faa-place/AE/Apo), built 1980, S/N M-2275 - [N300RF](https://openairdocs.org/aircraft/N300RF): [Rivers Robert A](https://openairdocs.org/faa-owner/RIVERS%20ROBERT%20A), [Oxford, NC](https://openairdocs.org/faa-place/NC/Oxford), built 1983, S/N BJ-2 - [N45191](https://openairdocs.org/aircraft/N45191): [Rinckel Jeannie M](https://openairdocs.org/faa-owner/RINCKEL%20JEANNIE%20M), [Wilmington, NC](https://openairdocs.org/faa-place/NC/Wilmington), built 1979, S/N AA5B1056 - [N455TA](https://openairdocs.org/aircraft/N455TA): [Surles Gregory Taylor](https://openairdocs.org/faa-owner/SURLES%20GREGORY%20TAYLOR), [Emerald Isle, NC](https://openairdocs.org/faa-place/NC/Emerald%20Isle), built 1978, S/N AA5B-0571 - [N468BC](https://openairdocs.org/aircraft/N468BC): [Hot Wings Flying Club LLC](https://openairdocs.org/faa-owner/HOT%20WINGS%20FLYING%20CLUB%20LLC), [Portland, OR](https://openairdocs.org/faa-place/OR/Portland), built 1975, S/N AA5B0195 - [N470RP](https://openairdocs.org/aircraft/N470RP): [Daytona Aircraft Services Inc](https://openairdocs.org/faa-owner/DAYTONA%20AIRCRAFT%20SERVICES%20INC), [Daytona Beach, FL](https://openairdocs.org/faa-place/FL/Daytona%20Beach), built 2014, S/N 72675 - [N591JP](https://openairdocs.org/aircraft/N591JP): [Reed Douglas W](https://openairdocs.org/faa-owner/REED%20DOUGLAS%20W), [Kingwood, TX](https://openairdocs.org/faa-place/TX/Kingwood), built 1976, S/N AA5B0361 - [N614PW](https://openairdocs.org/aircraft/N614PW): [Alpha Victor 8 LLC](https://openairdocs.org/faa-owner/ALPHA%20VICTOR%208%20LLC), [Broken Arrow, OK](https://openairdocs.org/faa-place/OK/Broken%20Arrow), built 1982, S/N M-2364 - [N624AC](https://openairdocs.org/aircraft/N624AC): [Anunson Andrew M](https://openairdocs.org/faa-owner/ANUNSON%20ANDREW%20M), [Pound, VA](https://openairdocs.org/faa-place/VA/Pound), built 2022, S/N 1273 - [N626FT](https://openairdocs.org/aircraft/N626FT): [626ft LLC](https://openairdocs.org/faa-owner/626FT%20LLC), [Los Angeles, CA](https://openairdocs.org/faa-place/CA/Los%20Angeles), built 1991, S/N 10035 - [N63732](https://openairdocs.org/aircraft/N63732): [Aeronation Aircraft & Exotics LLC](https://openairdocs.org/faa-owner/AERONATION%20AIRCRAFT%20%26%20EXOTICS%20LLC), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 1982, S/N M-2365 - [N6464Z](https://openairdocs.org/aircraft/N6464Z): [Flying Tiger LLC](https://openairdocs.org/faa-owner/FLYING%20TIGER%20LLC), [Birmingham, AL](https://openairdocs.org/faa-place/AL/Birmingham), built 1979, S/N AA5B1221 - [N663SM](https://openairdocs.org/aircraft/N663SM): [Macmoyle Scott](https://openairdocs.org/faa-owner/MACMOYLE%20SCOTT), [Blairstown, NJ](https://openairdocs.org/faa-place/NJ/Blairstown), built 1976, S/N AA5B0370 - [N681FS](https://openairdocs.org/aircraft/N681FS): [Mcmurtry Steven](https://openairdocs.org/faa-owner/MCMURTRY%20STEVEN), [El Dorado Hills, CA](https://openairdocs.org/faa-place/CA/El%20Dorado%20Hills), built 1990, S/N AA5B0400 - [N721ZM](https://openairdocs.org/aircraft/N721ZM): [Koenig Michal](https://openairdocs.org/faa-owner/KOENIG%20MICHAL), [Encinitas, CA](https://openairdocs.org/faa-place/CA/Encinitas), built 1976, S/N AA5B-0241 - [N731PK](https://openairdocs.org/aircraft/N731PK): [C & M Properties LLC](https://openairdocs.org/faa-owner/C%20%26%20M%20PROPERTIES%20LLC), [Chesterton, IN](https://openairdocs.org/faa-place/IN/Chesterton), S/N AA5B0670 - [N74LG](https://openairdocs.org/aircraft/N74LG): [Griffin Larry D](https://openairdocs.org/faa-owner/GRIFFIN%20LARRY%20D), [Lubbock, TX](https://openairdocs.org/faa-place/TX/Lubbock), built 2009, S/N 70847 - [N774DS](https://openairdocs.org/aircraft/N774DS): [Rosebud LLC](https://openairdocs.org/faa-owner/ROSEBUD%20LLC), [Libertyville, IL](https://openairdocs.org/faa-place/IL/Libertyville), built 2011, S/N 71087 - [N800GT](https://openairdocs.org/aircraft/N800GT): [Brooks Dallas S](https://openairdocs.org/faa-owner/BROOKS%20DALLAS%20S), [Medina, TN](https://openairdocs.org/faa-place/TN/Medina), built 1975, S/N AA5B-0077 - [N801X](https://openairdocs.org/aircraft/N801X): [Mississippi State University](https://openairdocs.org/faa-owner/MISSISSIPPI%20STATE%20UNIVERSITY), [Starkville, MS](https://openairdocs.org/faa-place/MS/Starkville), built 1974, S/N AA5B-0001 - [N80SC](https://openairdocs.org/aircraft/N80SC): [Richards Brian](https://openairdocs.org/faa-owner/RICHARDS%20BRIAN), [Aledo, TX](https://openairdocs.org/faa-place/TX/Aledo), built 2019, S/N 2047 - [N81283](https://openairdocs.org/aircraft/N81283): [Smith Brad R](https://openairdocs.org/faa-owner/SMITH%20BRAD%20R), [Sand Springs, OK](https://openairdocs.org/faa-place/OK/Sand%20Springs), built 1977, S/N AA5B0483 - [N82ZA](https://openairdocs.org/aircraft/N82ZA): [Cullen David F](https://openairdocs.org/faa-owner/CULLEN%20DAVID%20F), [Lantana, FL](https://openairdocs.org/faa-place/FL/Lantana), built 1991, S/N 10082 - [N835S](https://openairdocs.org/aircraft/N835S): [Spirit Of Flight LLC](https://openairdocs.org/faa-owner/SPIRIT%20OF%20FLIGHT%20LLC), [Noblesville, IN](https://openairdocs.org/faa-place/IN/Noblesville), built 2013, S/N 1675 - [N889D](https://openairdocs.org/aircraft/N889D): [Qualitair LLC Trustee](https://openairdocs.org/faa-owner/QUALITAIR%20LLC%20TRUSTEE), Michelstadt, built 1978, S/N AA5B-0706 - [N897GA](https://openairdocs.org/aircraft/N897GA): [Pruim Bradley](https://openairdocs.org/faa-owner/PRUIM%20BRADLEY), [Dorr, MI](https://openairdocs.org/faa-place/MI/Dorr), built 1991, S/N 10076 - [N90898](https://openairdocs.org/aircraft/N90898): [Nation Steven R](https://openairdocs.org/faa-owner/NATION%20STEVEN%20R), [Hurricane, UT](https://openairdocs.org/faa-place/UT/Hurricane), built 2007, S/N 24131 - [N9215S](https://openairdocs.org/aircraft/N9215S): [Garner James L DBA](https://openairdocs.org/faa-owner/GARNER%20JAMES%20L%20DBA), [Pelham, AL](https://openairdocs.org/faa-place/AL/Pelham), built 1973, S/N M1711 - [N9648B](https://openairdocs.org/aircraft/N9648B): [Barker David C](https://openairdocs.org/faa-owner/BARKER%20DAVID%20C), [Lumberton, NC](https://openairdocs.org/faa-place/NC/Lumberton), built 2012, S/N 838 - [N997VB](https://openairdocs.org/aircraft/N997VB): [Brandon Greg V](https://openairdocs.org/faa-owner/BRANDON%20GREG%20V), [Georgetown, TX](https://openairdocs.org/faa-place/TX/Georgetown), built 1976, S/N AA5B-0382 ## NTSB investigations (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB CEN13CA133](https://openairdocs.org/ntsb/CEN13CA133), Jan 12, 2013: American General Acft AG5B (N897GA), Ankeny, IA, substantial damage. Probable cause: The pilot’s failure to maintain a proper glide path to the runway in gusty wind conditions and his failure to maintain clearance from obstructions during the subsequent go-around. Contributing to the… ## FAA accident and incident reports (10) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Incident 20251125018139I](https://openairdocs.org/incident/20251125018139I), Nov 25, 2025: Beech C23 (N23HK), Bangor, ME, Minor damage. Pilot narrative: "On November 25, 2025, at approximately 1205 local time, I was taxiing aircraft on the General aviation ramp at Bangor International Airport… - [Incident 20200705011419I](https://openairdocs.org/incident/20200705011419I), Jul 5, 2020: Grumman American Avn. Corp. AA-5B (N997VB), Hondo, TX, Minor damage. On July 5, 2020 at 1500 central standard time. N997VB, a Grumman American AA5, during the take off roll,turned left, departed the runway. The left wing tip… - [Incident 20180528006189I](https://openairdocs.org/incident/20180528006189I), May 28, 2018: Gulfstream American Corp AA-5B (N45191), Norwood, MA, Minor damage. On Monday 05/28/2018, N45191, a Grumman tiger AA-5B, nose gear collapsed while the aircraft was conducting a run up on taxiway a at Norwood memorial airport… - [Accident 20130111000439A](https://openairdocs.org/incident/20130111000439A), Jan 11, 2013: American General Acft Corp AG5B (N897GA), Ankeny, IA, Substantial damage. The pilot purchased a grummin tiger in Florida and was flying it back to Iowa. He departed kcgi at 8:30PM CST enroute to kikv. When the pilot arrived at kikv… - [Incident 20060804020499I](https://openairdocs.org/incident/20060804020499I), Aug 4, 2006: Amrgen AA5B (N28534), Novato, CA, Minor damage. (-23) Upon landing, the left brake failed and the aircraft departed the runway to the right. Pilot was unable to recover in time to avoid a ditch. - [Incident 20030623019549I](https://openairdocs.org/incident/20030623019549I), Jun 23, 2003: Beech C23 (N63732), Cincinnati, OH, Minor damage. (-23) On first solo flight, pilot made first successful landing. On second landing aircraft touched down on nose gear, porpoised and bounced on runway,… - [Incident 19960829031699I](https://openairdocs.org/incident/19960829031699I), Aug 29, 1996: Gulstm AA5B (N133U), San Juan, Puerto Rico, Minor damage. Narrative: incident involves a student pilot on her first solo cross country flight. Mrs. Trinidad departed from sig to sig via bqn and stt, at 1000 on her… - [Incident 19950729020239I](https://openairdocs.org/incident/19950729020239I), Jul 29, 1995: Beech C23 (N614PW), Savoy, IL, Minor damage. Bounced and porpoised landing until nose wheel collapsed. Failed to take corrective action. - [Incident 19910907047839I](https://openairdocs.org/incident/19910907047839I), Sep 7, 1991: Beech C23 (N63732), Cincinnati, OH, Minor damage. Hard landing made due to a wind gust. Bounced. Made a go-around and landed without incident. Had bent propeller. - [Incident 19870808051179I](https://openairdocs.org/incident/19870808051179I), Aug 8, 1987: Beech C23 (N63732), Knoxville, TN, Minor damage. Flaps would not retract after touch and go. Overshot landing and forced nose into the ground to stop on the runway. ## Service difficulty reports (58, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2023FA0000844](https://openairdocs.org/sdr/2023FA0000844), Dec 1, 2023: SEAL. FAILED. UPON ,NSPECLION OL THE ENGINE TO DOTERMINE THE SOURCE OF A SIGNIFICANT OIL LEAK, IT WAS DETERMMED TO BE FROM LHE CRANKSHAFT SEAL. THE DEFECTIVE SEAL WAS REMOVED - [SDR 2023FA0000096](https://openairdocs.org/sdr/2023FA0000096), Feb 13, 2023: MAGNETO. DESTROYED. BOTH MAGNETOS WERE REMOVED AS PART OF THE ANNUAL INSPECTION AND SENT TO NORVIC AERO ENGINES LTD (FAA APPROVAL 33NY343C) FOR THEIR 500 HOUR INSPECTION. THE MAGNE - [SDR 2021FA0000016](https://openairdocs.org/sdr/2021FA0000016), Jan 22, 2021: COVER. DENTED. ENGINE WAS HAVING INTERMITTENT RPM LOSS & POWER LOSS WITH NO EXPLANATION AS TO WHY. ON THE GROUND DURING MAGNETO CHECK IT WOULD SOMETIMES BE NORMAL AND SOMETIME - [SDR 2019FA0000322](https://openairdocs.org/sdr/2019FA0000322), Sep 22, 2019: CYLINDER. BROKEN. FRONT PILOT SIDE CYLINDER (#2?) BROKE APART IN FLIGHT. I'M NOT SURE WHICH CYLINDER SERIAL NUMBER BROKE, BUT IT IS ONE OF: 28520-16, 28279-14, 28387-30, 28415-23 - [SDR CA190522007](https://openairdocs.org/sdr/CA190522007), May 17, 2019: SLIP RING. OUT OF POSITION. (CAN) SLIPRING FOUND INCORRECTLY POSITIONED ON ROTOR SHAFT AND BRUSH BLOCK ASSY FOUND IN CONTACT WITH THE SLIPRING WIRES. (TC# 20190522007) - [SDR CA180808017](https://openairdocs.org/sdr/CA180808017), Aug 8, 2018: MAGNETO. SEPARATED. (CAN) DURING A FLIGHT AIRCRAFT LOST THE USE OF A MAGNETO. AFTER OPENING THE ENGINE COVER, THE TECHNICIAN NOTICED THAT THE FLANGE OF THE MAGNETO WAS HANGING. A L - [SDR 2017FA0000454](https://openairdocs.org/sdr/2017FA0000454), Jul 2, 2017: INDICATOR. FAILED. INSTALLED G5 ATTITUDE INDICATOR AS REPLACEMENT FOR VACUUM ATTITUDE INDICATOR. REMOVED VACUUM SYSTEM. UNIT FAILED 8 HOURS AFTER INSTALLATION. MANUFACTURER REPAIR - [SDR 2017FA0000001](https://openairdocs.org/sdr/2017FA0000001), Dec 21, 2016: CONNECTING ROD. BROKEN. THE ENGINE WAS ORIGINAL 1979. IT SUFFERED A PROPELLER STRIKE/SUDDEN STOPPAGE EVENT IN JANUARY 1996. THE CRANKSHAFT WAS BENT BEYOND LIMITS. THE CRANKSHAFT AND CA - [SDR BQVR201603290001](https://openairdocs.org/sdr/BQVR201603290001), Mar 22, 2016: ENGINE. MAKING METAL. WHILE ACCOMPLISHING AN ANNUAL INSPECTION OF THE ACFT, NOTED FERROUS METAL INSIDE OIL FILTER CAN, AND DRAINED OIL. ENGINE IS NOT APPROVED FOR RETURN TO SERVICE. - [SDR JJ8S2014FA0000693](https://openairdocs.org/sdr/JJ8S2014FA0000693), Dec 2, 2014: VALVE. CRACKED. DURING TAKEOFF, PILOT NOTICED THE ENGINE HAD LOST POWER. PERFORMED AN EMERGENCY LANDING ON INTERSTATE. SUSPECT CARBURETOR HEAT BOX VALVE FAILURE. DURING VISUAL - [SDR 2014FA0000551](https://openairdocs.org/sdr/2014FA0000551), Sep 24, 2014: BUTTERFLY VALVE. CRACKED. WHILE PERFORMING TOUCH AND GO , PILOT NOTICED THAT ENGINE LOST POWER. SAFELY LANDED ACFT AND INSPECTED ENGINE COMPARTMENT. VISUAL INSPECTION SHOWED THAT THE CAR - [SDR 2011FA0000671](https://openairdocs.org/sdr/2011FA0000671), Aug 7, 2011: ALTERNATOR. LOOSE. ALTERNATOR CASE BOLTS WORKED LOOSE, SAFETY WIRE BROKEN. CATASTROPHIC FAILURE AT 152 HRS SINCE O/H. THE ORIGINAL MFG HISTORICALLY LAST MUCH LONGER. ADVISE SELF L - [SDR CA101117001](https://openairdocs.org/sdr/CA101117001), Nov 16, 2010: VALVE SPRING. BROKEN. (CAN) LORS D`UN INSPECTION DE 100 HRS, LE TECHNICIEN D`ENTRETIEN A DECOUVERT DU METAL (BRASSE) DANS LE FILTRE A L`HUILE. APRES INVESTIGATION, UNE "PUSH ROD TUBE - [SDR CA090106007](https://openairdocs.org/sdr/CA090106007), Jan 6, 2009: WIRE. BURNED. (CAN) DURING ANNUAL INSPECTION FLASHING BEACON WAS FOUND TO BE NOT WORKING. UPON TRACING THE WIRING A BURNED WIRE WAS DISCOVERED AT JUNCTION JP-1-2 BELOW INSTRU - [SDR CA070423002](https://openairdocs.org/sdr/CA070423002), Apr 23, 2007: CYLINDER. CRACKED. (CAN) CRACK FOUND IN CYLINDER. (TC NR 20070423002) - [SDR 2006FA0000964](https://openairdocs.org/sdr/2006FA0000964), Sep 19, 2006: ATTACH BOLT. WORN. DURING PRE-RUNUP INSPECTION FOR ANNUAL INSPECTION ALTERNATOR BELT NOTED TO BE LOOSE. UPON INSPECTION OF ALTERNATOR FOR BELT TENSION THE FOLLOWING WAS NOTED: THE - [SDR 2005FA0001552](https://openairdocs.org/sdr/2005FA0001552), Sep 30, 2005: CONNECTING ROD. BROKEN. CONNECTING ROD TO CRANKSHAFT BEARING FAILED RESULTING IN ROD DISCONNECTING FROM CRANKSHAFT AND SUBSEQUENT CASE PENETRATION AND ENGINE STOPPAGE. - [SDR 2005FA0001341](https://openairdocs.org/sdr/2005FA0001341), Sep 20, 2005: THROTTLE. STIFF. ANNUAL INSP, IT WAS DISCOVERED THA THE THROTTLE WOULD NOT REACH THE FULL THROTTLE STOP. THE THROTTLE CABLE WAS DISCONNECTED AND THE THROTTLE ARM WAS MOVED BY HA - [SDR 2004FA0000169](https://openairdocs.org/sdr/2004FA0000169), Dec 15, 2003: PUMP. INOPERATIVE. AIRCRAFT EXPERIENCED ENGINE FAILURE DUE TO LOSS OF FUEL PRESSURE DURING TRAINING FLIGHT. STUDENT FAILED TO TURN ON ALTERNATOR SWITCH AND BATTERY POWER WAS INSUF - [SDR 2003FA0001146](https://openairdocs.org/sdr/2003FA0001146), Sep 29, 2003: DRIVE GEAR. INOPERATIVE. WHILE ATTEMPTING TO START THE ENGINE, THE STARTER WOULD SPIN BUT WOULD NOT TURN THE ENGINE. THE ENGINE COWL WAS REMOVED AND IT WAS DETERMINED THAT THE STARTER D - [SDR 2002FA0001191](https://openairdocs.org/sdr/2002FA0001191), Oct 3, 2002: LOCK. OVERTORQUED. LOCKPLATE FOR CRANKSHAFT GEAR RETAINING BOLT NOT SUFFICIENTLY BENT ALLOWING CRANKSHAFT GEAR BOLT TO LOOSEN. CRANKSHAFT GEAR DOWEL PIN SHEARED. RECOMMENDATION TO - [SDR CA020503005](https://openairdocs.org/sdr/CA020503005), Apr 11, 2002: CRANKCASE. CRACKED. (CAN) DURING A 50 HOUR INSPECTION, AN OIL LEAK WAS NOTED ON THE CRANKCASE HOUSING. FURTHER INSPECTION REVEALED A CRACK ON THE FORWARD LEFT HAND PART OF THE CASE - [SDR AUS20020717](https://openairdocs.org/sdr/AUS20020717), Mar 20, 2002: SCREW. MISSING. (AUS) CARBURETTOR HEAT INOPERATIVE DUE TO MISSING SCREWS (3OFF) AND NUTS ALLOWING THE BUTTERFLY VALVE TO ROTATE FREELY ON THE SHAFT PNO 169-910049-47. - [SDR 2002FA0000096](https://openairdocs.org/sdr/2002FA0000096), Dec 10, 2001: ENGINE. LEAKING. ENGINE DEVELOPED OIL LEAK AT THE TOP OF THE CASE NEAR THE ACCESSORY CASE. LEAK BEGAN DURING INITIAL ENGINE RUN. LEAK IS APPX 1/8 QT PER 6 HRS. LEAK COULD NOT BE - [SDR CA010118012](https://openairdocs.org/sdr/CA010118012), Dec 1, 2000: STOP. BENT. (CAN) LEFT AND RIGHT AILERON STOPS FOUND SEVERELY BENT. POSSIBLE WING DAMAGE. - [SDR CA001129004](https://openairdocs.org/sdr/CA001129004), Nov 1, 2000: CYLINDER. CRACKED. (CAN) THE CYLINDER ASSEMBLY CRACKED AT THE CYLINDER HEAD FLANGE. THE CRACK EXTENDED HALF WAY THROUGH THE CIRCUMFERENCE OF THE CYLINDER. (X) - [SDR CA001129010](https://openairdocs.org/sdr/CA001129010), Nov 1, 2000: CYLINDER. CRACKED. (CAN) THE CYLINDER ASSEMBLY CRACKED AT THE CYLINDER HEAD FLANGE. THE CRACK EXTENDED HALF WAY THROUGH THE CIRCUMFERENCE OF THE CYLINDER. (X) - [SDR 20000811SH013](https://openairdocs.org/sdr/20000811SH013), Jul 24, 2000: EXHAUST VALVE. CRACKED. EXHAUST VALVE BROKE ON NR 1 CYLINDER. HALF OF VALVE HEAD CAME OFF CAUSING DAMAGE TO NR 1 CYLINDER AND THEN BROKE INTO 3 PIECES. TWO PIECES LODGED IN THE MUFFLER - [SDR 20000515SH020](https://openairdocs.org/sdr/20000515SH020), Mar 20, 2000: FLOAT. DAMAGED. ENGINE WOULD NOT RUN UNLESS MIXTURE WAS LEANED ALMOST TO IDLE CUT OFF. IT WAS VERY RICH AND WOULD NOT RUN ABOVE 1,500 RPM. FOUND PLASTIC FLOAT TO BE FILLED WITH - [SDR 20000517SH024](https://openairdocs.org/sdr/20000517SH024), Mar 20, 2000: FLOAT. DAMAGED. ENGINE WOULD NOT RUN UNLESS MIXTURE WAS LEANED ALMOST TO IDLE CUT-OFF, IT WAS VERY RICH AND WOULD NOT RUN ABOVE 1,500 RPM. FOUND PLASTIC FLOAT FILLED 100 II AVG - [SDR 2000ZZZX265](https://openairdocs.org/sdr/2000ZZZX265), Jan 14, 2000: CYLINDER. MISMANUFACTURED. PORT DOES NOT ALIGN WITH EXHAUST GASKET. ON RECEIPT OF CYLINDERS, THEY ARE CHECKED FOR CONFORMITY. ONE OF THE CHECKS IS PLACING A GASKET ON THE EXHAUST STUDS TO - [SDR 99ZZZX3607](https://openairdocs.org/sdr/99ZZZX3607), Aug 25, 1999: VALVE. FAILED. REMOVED NR 3 CYLINDER DUE TO BROKEN EXHAUST VALVE. VALVE BROKE IN-FLIGHT AND ENGINE STARTED RUNNING ROUGH. REPLACED CYLINDER ASSEMBLY, PISTON AND RINGS. ENGINE - [SDR AU981080](https://openairdocs.org/sdr/AU981080), Aug 27, 1998: HUB. CRACKED. (AUS) PROPELLER HUB CRACKED IN TWO AREAS. FOUND DURING INSPECTION IAW AD/PFP/13 AMDT3. - [SDR CA980908032](https://openairdocs.org/sdr/CA980908032), Aug 20, 1998: ROD. DISCONNECTED. (CAN) NR 1 AND NR 3 CONNECTING RODS WERE FOUND DISCONNECTED FROM THE CRANKSHAFT. ENGINE IS BEING SENT FOR INVESTIGATION. - [SDR 98ZZZX3035](https://openairdocs.org/sdr/98ZZZX3035), Jun 18, 1998: HOSE. COLLAPSED. IN CRUISE FLIGHT, ENGINE BEGAN TO RUN ROUGH. THE PILOT NOTED LOST OIL PRESSURE. HE CONTACTED ATC WHO DIRECTED HIM TO NEAREST AIRPORT. THE ENGINE KEPT DETERIORAT - [SDR AU980560](https://openairdocs.org/sdr/AU980560), May 21, 1998: BEARING. LOOSE. (AUS) MAGNETO BEARING SPINNING IN PLATE. - [SDR CA980504026](https://openairdocs.org/sdr/CA980504026), Apr 28, 1998: CYLINDER. CRACKED. (CAN) FOUND THE ALUMINUM HEAD ON NR 3 CYLINDER CRACKED AT THE TOP OF THE STEEL BARREL. - [SDR AU980411](https://openairdocs.org/sdr/AU980411), Mar 26, 1998: DIODE. FAILED. (AUS) DURING CRUISE, THE 'OVER-VOLTAGE' PROTECTION ZENER DIODE FAILED, CAUSING EXTENSIVE FAILURE OF ELECTRICAL AND AVIONICS EQUIPMENT. - [SDR CA971021016](https://openairdocs.org/sdr/CA971021016), Oct 10, 1997: ROTOR. BROKEN. (CAN) AFTER STARTING THE ENGINES, A CHECK OF THE MAGNETOS REVEALED THE RIGHT HAND MAGNETO WAS DEAD. THE AIRCRAFT WAS TAKEN TO MAINTENANCE AND THE TECHNICIAN FOU - [SDR AU970670](https://openairdocs.org/sdr/AU970670), Jun 6, 1997: CRANKCASE. CRACKED. (AUS) ENGINE CRANKCASE CRACKED IN WEB BETWEEN CYLINDER BASE PADS -CRANKSHAFT GEAR SPALLED - CAM GEAR TEETH SPALLED - FUEL PUMP IDLER GEAR TEETH SPALLED - OIL PU - [SDR 97ZZZX3089](https://openairdocs.org/sdr/97ZZZX3089), Jun 3, 1997: THROTLE BODY. STUCK OPEN. THROTTLE STUCK OPEN. GAINED ACCESS TO AIRCRAFT ENGINE THROTTLE BODY BY REMOVING RT AND LT TOP ENGINE COWLINGS AND LOWER ENGINE COWL. RAN THROTTLE THROUGH AND SA - [SDR AU970541](https://openairdocs.org/sdr/AU970541), May 14, 1997: COIL. OPEN. (AUS) MAGNETO COIL OPEN CIRCUITED ON HIGH TENSION SIDE - [SDR AU971134](https://openairdocs.org/sdr/AU971134), Apr 15, 1997: SPARK PLUG. INTERMITTENT. (AUS) SPARK PLUGS INTERMITTENT IN OPERATION. - [SDR 97ZZZX2854](https://openairdocs.org/sdr/97ZZZX2854), Apr 12, 1997: VALVE. FAILED. VALVE MALFUNCTION OCCURRED DURING TAKEOFF AT APPROXIMATELY 2,450 RPM. (AIRPORT AT 5,100 FEET). OAT 20 DEGREES FAHRENHEIT. - [SDR 97ZZZX1879](https://openairdocs.org/sdr/97ZZZX1879), Apr 3, 1997: ROD BEARING. FAILED. METAL WAS FOUND IN THE SCREEN AND OIL FILTER AT THE 100-HOUR INSPECTION. THE CYLINDERS WERE REMOVED AND NO EVIDENCE OF METAL WEAR COULD BE FOUND. THE AIRCRAFT W - [SDR 96ZZZX6141](https://openairdocs.org/sdr/96ZZZX6141), Dec 12, 1996: RETAIN SCREW. LOOSE. PILOT REPORTED ENIGNE HAD STARTED RUNNING ROUGH AND EGT AT PEAK WITH MIXTURE FULL RICH. INVESTIGATION REVEALED MIXTURE CONTROL VALVE END PLAY OF APPROX .0625 IN - [SDR CA960826093](https://openairdocs.org/sdr/CA960826093), Aug 14, 1996: ROTOR. BROKEN SHAFT. (CAN) THE MAGNETO DID NOT FUNCTION DURING GROUND RUN. THE MAGNETO WAS REPLACED. INSPECTION OF THE FAULTY MAGNETO REVEALED THE SLOTTED END OF THE ROTOR SHAFT BRO - [SDR CA960826091](https://openairdocs.org/sdr/CA960826091), Aug 13, 1996: CABLE. BROKEN. (CAN) AT RUN-UP THE PILOT NOTED THAT THE ENGINE DID NOT RESPOND TO THROTTLE INPUT. THE ENGINE WAS SHUTDOWN BY THE MIXTURE CONTROL AND THE AIRCRAFT TOWED TO THE - [SDR 96ZZZX3876](https://openairdocs.org/sdr/96ZZZX3876), Jul 1, 1996: CYLINDER. CRACKED. INSPECTION FOUND NR 4 CYLINDER CRACKED FROM OUTSIDE RADIUS OF INTAKE VALVE TO OUTSIDE RADIUS OF EXHAUST VALVE. CYLINDER HEAD SPLIT OPEN BLOWING BOTTOM SPARK PLU - [SDR 96ZZZX4954](https://openairdocs.org/sdr/96ZZZX4954), Jun 19, 1996: DISTRIBUTOR BLK. DEFECTIVE. DISASSEMBLED RT MAGNETO. FOUND EXCESSIVE CARBON RESIDUE IN COIL AREA. FURTHER INVESTIGATION REVEALED THE ROTOR ARM ON GEAR ASSY HAD BECOME LOOSE ALLOWING APPROX All 58: https://openairdocs.org/engine/lycoming-o-360-a4k/reports.md ## STCs that may be installed (OpenAirDocs) (39) 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 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 SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc - [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com. Lists O-360 Series - [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 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 SE2390CE](https://openairdocs.org/stc/SE2390CE): Installation of B & C Speciality Products. B & C Specialty Products Inc. Lists O-360 Series - [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc - [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp - [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 SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists O-360 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists O-360 Series - [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. Hartzell Engine Technologies, LLC. Lists O-360 Series - [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter. Hartzell Engine Technologies, LLC - [STC SE00357NY](https://openairdocs.org/stc/SE00357NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed. Hartzell Engine Technologies, LLC. Lists O-360 Series - [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [STC SE02291AT](https://openairdocs.org/stc/SE02291AT): Conversion of the engine from a carburetor fuel system and magneto ignition system to a full authority digital electronic control (FADEC) system for fuel injection and ignition. Continental Motors, Inc - [STC SE01524CH](https://openairdocs.org/stc/SE01524CH): Replace Slick 6000, 6100, 6200, 6300, 4000, 4100, 4200, and 4300 series magnetos and TCM/Bendix S6-20, S6-200, S6-1200, S-20, S-200, and S-1200 series magnetos with Champion Limited Authority Spark Advance Regulator (LASAR ) Model 4755 and 6755 bush kit ignition systems. Champion Aerospace LLC - [STC SE524CH](https://openairdocs.org/stc/SE524CH): Replace Slick 4000, 4100, 4200, and 4300 series magnetos and TCM/Bendix S-20, S-200, and S-1200 series magnetos with the Champion Limited Authority Spark Advance Regulator (LASAR ). Champion Aerospace LLC - [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 SE927GL](https://openairdocs.org/stc/SE927GL): Installation of a Shadin Co. fuel flow transducer. Shadin Avionics - [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE00889LA](https://openairdocs.org/stc/SE00889LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models. Nickson's Machine Shop Inc - [STC SE2563CE](https://openairdocs.org/stc/SE2563CE): Leaded and unleaded automotive gasoline, 91 minimum antiknock index (RON+MON) /2 per ASTM spec D-439. Intermixing with aviation gasoline also approved. Petersen Aviation 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 O-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 O-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 O-360 Series - [STC SE370NE](https://openairdocs.org/stc/SE370NE): Installation of 'Auto-Vac 2' auxiliary vacuum system. Raymond Ives - [STC SE4153NM](https://openairdocs.org/stc/SE4153NM): Installation of a Marvel Model MA-4-5 carburetor and associated parts. Big Bend Community College - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists O-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 O-360 Series - [STC SE3309NM](https://openairdocs.org/stc/SE3309NM): Installation of Airesearch Model TA04 Turbosupercharger. Seaplane Flying Inc - [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists O-360 Series - [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists O-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 O-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 O-360 Series --- 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.