# Lycoming IO-320-E2A - Type: Engine model (FAA registry) - Registry code: 41919 - Manufacturer (registry): LYCOMING - Model: IO-320-E2A - Engine type: Reciprocating - Power: 150 hp - Data sheet: [TCDS 1E12](https://openairdocs.org/tcds/1E12) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 11 registered aircraft - Page: https://openairdocs.org/engine/lycoming-io-320-e2a 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 2015-19-07](https://openairdocs.org/ad/2015-19-07): Fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 187 more. Effective Nov 3, 2015 - [AD 2012-03-06](https://openairdocs.org/ad/2012-03-06): Fuel servo diaphragm · Continental Motors 6-260-A, 6-285-A, 6-285-B and 482 more. Effective Feb 24, 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 2009-02-03](https://openairdocs.org/ad/2009-02-03): Fuel injection servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 261 more. Effective Feb 9, 2009 - [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 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 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003 - [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 96-23-03](https://openairdocs.org/ad/96-23-03): High pressure fuel pumps · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 174 more. Effective Dec 23, 1996 - [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 - [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 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 79-04-05](https://openairdocs.org/ad/79-04-05): Regulator Diaphragm Stem Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 215 more. Effective Sep 26, 1979 - [AD 78-23-10](https://openairdocs.org/ad/78-23-10): Center Body Bellows Seal Assembly · Lycoming Engines AEIO-320-D1B, AEIO-320-E1A, AEIO-320-E1B and 218 more. Effective Nov 7, 1978 - [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 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 75-09-15](https://openairdocs.org/ad/75-09-15): Fuel Starvation To The Engine · Lycoming Engines AIO-320-A1A, AIO-320-A1B, AIO-320-A2A and 130 more. Effective Apr 30, 1975 - [AD 73-10-02](https://openairdocs.org/ad/73-10-02): Bendix Fuel Injectors · Bendix Fuel Injectors, AIO-320-A1A, AIO-320-A1B and 88 more. Effective May 16, 1973 - [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 67-22-06](https://openairdocs.org/ad/67-22-06): Fuel Injectors · Lycoming Engines HIO-360-A1A, HIO-360-B1A, HIO-360-B1B and 28 more. Effective Aug 9, 1967 - [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 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 2011-26-04](https://openairdocs.org/ad/2011-26-04) (historical): Externally mounted fuel injector fuel lines · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 186 more. Effective Jan 25, 2012 - [AD 2011-15-10](https://openairdocs.org/ad/2011-15-10) (historical): Fuel servos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 256 more. Effective Aug 16, 2011 - [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 2008-14-07](https://openairdocs.org/ad/2008-14-07) (historical): Externally mounted fuel injector fuel lines · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1B and 185 more. Effective Aug 14, 2008 - [AD 2008-08-14](https://openairdocs.org/ad/2008-08-14) (historical): Fuel injection servo plugs · Superior Air Parts AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 242 more. Effective Apr 29, 2008 - [AD 2008-06-51](https://openairdocs.org/ad/2008-06-51) (historical): Fuel injection servo plugs · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 235 more - [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 2002-26-01](https://openairdocs.org/ad/2002-26-01) (historical): Fuel injector fuel lines · Textron Lycoming, AVCO IGO-480-A1B6, IGO-540-B1A, IGO-540-B1C and 178 more. Effective Jan 31, 2003 - [AD 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998 - [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) (7) - [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-09-04](https://openairdocs.org/saib/NE-09-04): Fuel Control/Reciprocating Engines. Issued Jan 10, 2009 - [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 (11) - [N163DH](https://openairdocs.org/aircraft/N163DH): [Gilbert Jeffrey R](https://openairdocs.org/faa-owner/GILBERT%20JEFFREY%20R), [Dahlonega, GA](https://openairdocs.org/faa-place/GA/Dahlonega), built 2012, S/N 11459 - [N2568T](https://openairdocs.org/aircraft/N2568T): [Deuel Justin R](https://openairdocs.org/faa-owner/DEUEL%20JUSTIN%20R), [Mankato, MN](https://openairdocs.org/faa-place/MN/Mankato), S/N 23779 - [N25SA](https://openairdocs.org/aircraft/N25SA): [Alderman Steve](https://openairdocs.org/faa-owner/ALDERMAN%20STEVE), [Fort Pierce, FL](https://openairdocs.org/faa-place/FL/Fort%20Pierce), S/N 479-320-49P - [N26DB](https://openairdocs.org/aircraft/N26DB): [Den Besten Dale L](https://openairdocs.org/faa-owner/DEN%20BESTEN%20DALE%20L), [Canton, SD](https://openairdocs.org/faa-place/SD/Canton), built 1993, S/N 007 - [N41696](https://openairdocs.org/aircraft/N41696): [Aaa Aviation LLC](https://openairdocs.org/faa-owner/AAA%20AVIATION%20LLC), [Donalsonville, GA](https://openairdocs.org/faa-place/GA/Donalsonville), built 1973, S/N 116-73 - [N54LJ](https://openairdocs.org/aircraft/N54LJ): [Poulton Douglas E](https://openairdocs.org/faa-owner/POULTON%20DOUGLAS%20E), [Castro Valley, CA](https://openairdocs.org/faa-place/CA/Castro%20Valley), built 1969, S/N 001 - [N618VM](https://openairdocs.org/aircraft/N618VM): [Van Eendenburg John](https://openairdocs.org/faa-owner/VAN%20EENDENBURG%20JOHN), [Bloomington, MN](https://openairdocs.org/faa-place/MN/Bloomington), built 2019, S/N 892 - [N779GS](https://openairdocs.org/aircraft/N779GS): [779 Aviation LLC](https://openairdocs.org/faa-owner/779%20AVIATION%20LLC), [Dover, DE](https://openairdocs.org/faa-place/DE/Dover), built 1972, S/N 303-72 - [N8239A](https://openairdocs.org/aircraft/N8239A): [Bland Jerry D](https://openairdocs.org/faa-owner/BLAND%20JERRY%20D), [Lubbock, TX](https://openairdocs.org/faa-place/TX/Lubbock), built 2025, S/N 93271 - [N909MP](https://openairdocs.org/aircraft/N909MP): [Sky Guy LLC](https://openairdocs.org/faa-owner/SKY%20GUY%20LLC), [Frankenmuth, MI](https://openairdocs.org/faa-place/MI/Frankenmuth), built 1972, S/N 291-72 - [N9XK](https://openairdocs.org/aircraft/N9XK): [Landrum Kelly Thomas](https://openairdocs.org/faa-owner/LANDRUM%20KELLY%20THOMAS), [Halifax, VA](https://openairdocs.org/faa-place/VA/Halifax), built 2004, S/N 22399 ## 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 CHI01LA236](https://openairdocs.org/ntsb/CHI01LA236), Jul 22, 2001: Champion 7KCAB (N7537F), Brooklyn, MI, substantial damage. Probable cause: The forced landing for undetermined reasons. A factor to the accident was the corn crop. ## FAA accident and incident reports (2) 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. - [Accident 20010722026539A](https://openairdocs.org/incident/20010722026539A), Jul 22, 2001: Bbavia 7KCAB (N7537F), Brooklyn, MI, No damage. (-23) Upon executing a go around at shamrock airport (6G8) and during climb out engine power was lost. - [Incident 19910902048599I](https://openairdocs.org/incident/19910902048599I), Sep 2, 1991: Bbavia 8KCAB (N41696), Lawrence, MA, Minor damage. Lost control of aircraft while taxiing and nosed up. Prop struck runway. Pilots foot caught between brakes. ## Service difficulty reports (10) As reported by operators and repair stations, by the model named in the report. - [SDR 2023FA0000335](https://openairdocs.org/sdr/2023FA0000335), Jun 22, 2023: CYLINDER. SEPARATED. #2 CYLINDER SEPARATED FROM CASE. APPEARS CONNECTING ROD OR WRIST PIN SEPARATED FROM PISTON WHICH CAUSED CYLINDER TO SEPARATE. ENGINE HAD APPROXIMATELY 6 QUARTS - [SDR CA111003010](https://openairdocs.org/sdr/CA111003010), Sep 17, 2011: COIL. MALFUNCTIONED. (CAN) WEAK SPARK WHEN HOT. REPLACED WITH NEW COIL. - [SDR 2011FA0000362](https://openairdocs.org/sdr/2011FA0000362), Apr 30, 2011: CONNECTING ROD. SEPARATED. LEVEL AT 2000', HEARD LOUD BANG AND ENGINE QUIT. MADE OFF AIRPORT LANDING. VISUAL INSPECTION OF ENGINE CRANK CASE REVEILED THAT A CONNECTING ROD HAD PENETRATED - [SDR 2005FA0000945](https://openairdocs.org/sdr/2005FA0000945), Jun 23, 2005: CONTROL CABLE. SLIPPED. AILERON CABLE SLIPPED OUT OF THE INBOARD NICOPRESS SLEEVE ON THE FORWARD AILERON CABLE IN THE LEFT WING. ALL 4 (LEFT AND RIGHT WING) CABLES WERE PURCHASED NEW F - [SDR 2002FA0001377](https://openairdocs.org/sdr/2002FA0001377), Dec 9, 2002: SPAR. CRACKED. WHILE COMPLYING WITH AD 2000-25-02 R1 (WING SPAR INSPECTION) FOUND BOTH FORWARD SPARS CRACKED AT SPAR ROOT. EACH SPAR HAD TWO CRACKS RUNNING THE LENGTH OF THE W - [SDR 2002FA0001128](https://openairdocs.org/sdr/2002FA0001128), Sep 11, 2002: CABLE. BROKEN. THE DOWN ELEVATOR CONTROL CABLE FAILED AT THE REAR PULLEY BELOW BATTERY BOX. THE PULLEY HAD STOPPED TURNING THUS CUTTING OR WEARING CONTROL CABLE TO A CONDITION - [SDR AU980721](https://openairdocs.org/sdr/AU980721), Jun 20, 1998: THROTTLE CABLE. BROKEN. (AUS) THROTTLE CONTROL CABLE BROKEN AT THROTTLE LEVER. PART TOTAL CYCLES: 1,552. - [SDR 96ZZZX2558](https://openairdocs.org/sdr/96ZZZX2558), Jan 24, 1996: CAMSHAFT. DAMAGED. ANNUAL INSPECTION - LARGE AMOUNT OF METAL FRAGMENTS IN OIL PRESSURE AND OIL SUCTION SCREENS. CYLINDERS REMOVED, 7 LIFTER BODIES NOT TURNING, ENGINE TEAR-DOWN RE - [SDR 96ZZZX2559](https://openairdocs.org/sdr/96ZZZX2559), Jan 24, 1996: LIFTER. DAMAGED. ANNUAL INSPECTION - LARGE AMOUNT OF METAL FRAGMENTS IN OIL PRESSURE AND OIL SUCTION SCREENS. CYLINDERS REMOVED, 7 LIFTER BODIES NOT TURNING, ENGINE TEAR-DOWN RE - [SDR 95ZZZX2969](https://openairdocs.org/sdr/95ZZZX2969), May 18, 1995: DIVERSION PLATE. BROKEN. AFTER REMOVAL OF OIL PAN AND ACCESSORY SECTION TO COMPLY WITH 'AD' OF OIL PUMP ASSY, FOUND INVERTED FLIGHT OIL DIVERATING PAN (PART UNK) CRACKED AND BROKEN FROM ## STCs that may be installed (OpenAirDocs) (40) 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 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 SE2452CE](https://openairdocs.org/stc/SE2452CE): Installation of B&C Specialty Products lightweight (10.2 pounds) engine starter PN BC315-100-1(12 volt) or PN BC315-100-3(24 volt) on engines with ring gears having 122 teeth and PN BC315-100-2 (12 volt) or PN BC315-100-4 (24 volt) on engines with ring gears having 149 teeth. B & C Specialty Products Inc. Lists IO-320 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 SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp - [STC SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles. General Aviation Modifications Inc. Lists IO-320 Series - [STC SE03215CH](https://openairdocs.org/stc/SE03215CH): STC for the conversion of Lycoming O-320-A, B, C, D, E; IO-320-A, B, C, D, E, F; AIO-320-A, B; AEIO-320-D, E to increase engine displacement to 340 cubic inches by installation of a crankshaft with a longer stroke. Continental Motors, Inc - [STC SE1339SW](https://openairdocs.org/stc/SE1339SW): Modify pistons to Drawings 11007 and 11015; piston rings. Continental Motors, Inc - [STC SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists IO-320 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists IO-320 Series - [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. Hartzell Engine Technologies, LLC. Lists IO-320 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 IO-320 Series - [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [STC SE02409AK](https://openairdocs.org/stc/SE02409AK): Installation of the Superior Air Parts Cold Air Induction System (CAIS). Wattum Aircraft Services - [STC SE00590DE](https://openairdocs.org/stc/SE00590DE): Installation of modified Lubricated Camshaft. Centri-Lube Technologies LLC - [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 SE859GL](https://openairdocs.org/stc/SE859GL): Replacement of Bendix S4LN-20, -21, -1209, or -1227 model magnetos with Slick Model 4250 or 4251 magnetos. Champion Aerospace LLC - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc - [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 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 IO-320 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 IO-320 Series - [STC SE7CE](https://openairdocs.org/stc/SE7CE): Modification of oil sump in accordance with Champion Drawing No. 7-1312F. American Champion Aircraft - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists IO-320 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 IO-320 Series - [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists IO-320 Series - [STC SE244NE](https://openairdocs.org/stc/SE244NE): Installation of Mattituck plasma flame sprayed cylinder barrels in Teledyne reciprocating engines. Mattituck Airbase, Inc. Lists IO-320 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 IO-320 Series - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists IO-320 Series - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists IO-320 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.