# Lycoming AEIO-320-E1B - Type: Engine model (FAA registry) - Registry code: 41926 - Manufacturer (registry): LYCOMING - Model: AEIO-320-E1B - Engine type: Reciprocating - Power: 150 hp - Data sheet: [TCDS 1E12](https://openairdocs.org/tcds/1E12) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 6 registered aircraft - Page: https://openairdocs.org/engine/lycoming-aeio-320-e1b 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 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 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 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 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 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 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-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 (6) - [N4775P](https://openairdocs.org/aircraft/N4775P): built 1975, S/N 20675 - [N492JB](https://openairdocs.org/aircraft/N492JB): [Borke Michael F](https://openairdocs.org/faa-owner/BORKE%20MICHAEL%20F), [Charleston, SC](https://openairdocs.org/faa-place/SC/Charleston), built 2007, S/N 90852 - [N50450](https://openairdocs.org/aircraft/N50450): [Loyd Micheal Kevin](https://openairdocs.org/faa-owner/LOYD%20MICHEAL%20KEVIN), [Grantville, GA](https://openairdocs.org/faa-place/GA/Grantville), built 1979, S/N 509-79 - [N5061N](https://openairdocs.org/aircraft/N5061N): [Groth Matthew C](https://openairdocs.org/faa-owner/GROTH%20MATTHEW%20C), [Arlington, WA](https://openairdocs.org/faa-place/WA/Arlington), built 1979, S/N 562-79 - [N53870](https://openairdocs.org/aircraft/N53870): [Vier Bradford Edward](https://openairdocs.org/faa-owner/VIER%20BRADFORD%20EDWARD), [Austin, TX](https://openairdocs.org/faa-place/TX/Austin), built 1975, S/N 225-76 - [N6LV](https://openairdocs.org/aircraft/N6LV): [Eaton Raymond S](https://openairdocs.org/faa-owner/EATON%20RAYMOND%20S), [Plantation, FL](https://openairdocs.org/faa-place/FL/Plantation), built 2021, S/N 22917 ## 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 ATL96LA016](https://openairdocs.org/ntsb/ATL96LA016), Dec 1, 1995: Bellanca 8KCAB (N53870), Alexander City, AL, substantial damage. Probable cause: The leaking fuel injector, which created a rich mixture, and caused the aircraft engine to lose power. ## FAA accident and incident reports (3) 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 20200423003929I](https://openairdocs.org/incident/20200423003929I), Apr 23, 2020: Bellanca 8KCAB (N53870), Sidney, NE, Minor damage. -Pilot stated being on cross country trip from austin, Texas to seattle, Washington. The pilot overnighted in Sidney Nebraska. -Pilot had aircraft serviced and… - [Accident 19951201039499A](https://openairdocs.org/incident/19951201039499A), Dec 1, 1995: Bbavia 8KCAB (N53870), Alexander City, AL, Substantial damage. Lost power en route. Struck trees trying land on road. Oring diaphragm fuel injector servo leaking. Rich mixture. - [Incident 19930526024599I](https://openairdocs.org/incident/19930526024599I), May 26, 1993: Bbavia 8KCAB (N5061N), Brenham, TX, Minor damage. Pilots seat assembly collapsed on landing. Caused a propeller strike.AN4-12 bolt backout. No nut or cotter pin. ## Service difficulty reports (12) As reported by operators and repair stations, by the model named in the report. - [SDR 2022FA0000600](https://openairdocs.org/sdr/2022FA0000600), Oct 13, 2022: NONE. NONE. AFTER INSPECTION OF PAWL RETAINING RIVET, IT WAS FOUND TO BE BEYOND ITS ACCEPTABLE LIMITS LISTED IN 3.3.4 OF THE SLICK INDUSTRIES MAINTENANCE AND OVERHAUL MANUA - [SDR 2022FA0000166](https://openairdocs.org/sdr/2022FA0000166), Mar 24, 2022: DISTRIBUTOR GEAR. BACKED OUT. INSPECTED BOTH MAGNETOS PER LYCOMING SB 622A AND FOUND BOTH AFFECTED DISTRIBUTOR GEAR PN K3008 ELECTRODES LOOSE. ALSO SEE SLICK SB SBI-15A. - [SDR 2022FA0000599](https://openairdocs.org/sdr/2022FA0000599), Mar 1, 2022: NONE. NONE. DURING AN ANNUAL INSPECTION, THE MUFFLER ASSEMBLY WAS REMOVED TO REPLACEMENT. AT THIS TIME IT WAS DISCOVERED THAT THE MUFFLER SHROUD INLET SCAT TUBE WAS MAKING - [SDR Q532018F00000](https://openairdocs.org/sdr/Q532018F00000), Sep 5, 2018: TUBE. FAILED. NOSE TIRE WENT FLAT ON STUDENT SOLO LANDING NO DAMAGE. DISASSEMBLE FOUND ONE SPOT ON TUBE SIDEWALL HAD FAILED OR WORN THROUGH. TUBE LEAK GUARD BUTY L INNER TUBE - [SDR 2018FA0000078](https://openairdocs.org/sdr/2018FA0000078), Feb 9, 2018: FILTER. FRACTURED. REMOVED FUEL SERVO INLET STRAINER, FROM THE FUEL SERVO FOR 100HR CLEANING AND INSPECTION. WELDS HOLDING FILTER ELEMENT TO END FITTINGS WERE COLD, LACKING PENETR - [SDR 20010205CW007](https://openairdocs.org/sdr/20010205CW007), Jan 16, 2001: ALTERNATOR. SEPARATED. OHC ALTERNATOR, BOLTS HOLDING HOUSING TOGETHER, 2 BACKED OUT, LEFT HANGING BY INTACT SAFETY TO 3RD BOLT. - [SDR 20000505SH031](https://openairdocs.org/sdr/20000505SH031), May 5, 2000: MAGNETO. CONTAMINATED. OWNER COMPLAINED OF ROUGH RUNNING/MISSING WHEN ENGINE HOT WHILE AT LOW POWER SETTINGS. RT MAG (4150) REMOVED. EXCESS PLAY IN DIST END BEARING (APPROX PLAY, .030 - [SDR 20000505SH032](https://openairdocs.org/sdr/20000505SH032), May 5, 2000: MAGNETO. CONTAMINATED. OWNER COMPLAINED OF ROUGH RUNNING/MISSING WHEN ENGINE HOT WHILE AT LOW POWER SETTINGS. RT MAG (4150) REMOVED. EXCESS PLAY IN DIST END BEARING (APPROX PLAY, .030 - [SDR CA990531018](https://openairdocs.org/sdr/CA990531018), May 18, 1999: COIL. BROKEN. (CAN) GOVERNOR OUTPUT PRESSURE LOW. REMOVED OLD SPRING AND FOUND IT TO BE BROKEN INTO THREE PIECES. - [SDR CA980610014](https://openairdocs.org/sdr/CA980610014), May 29, 1998: DIAPHRAGM. FAILED. (CAN) DURING THE ENGINE RUN-UP PREPARATORY TO THE ANNUAL INSPECTION, THE ENGINE WAS RUNNING VERY ROUGH WITH BLADE SMOKE COMING FROM THE EXHAUST. INSPECTION REVE - [SDR CA960527007](https://openairdocs.org/sdr/CA960527007), May 1, 1996: SPAR. CRACKED. (CAN)THE REAR SPAR EXHIBITS SIGNS OF WOOD COMPRESSION FAILURE AT THE 46 INCH LOCATION OUTBOARD FROM THE ROOT. - [SDR 96ZZZX195](https://openairdocs.org/sdr/96ZZZX195), Dec 21, 1995: SERVO INJECTOR. SEAL FAILED. WHILE IN LEVEL FLIGHT AT AN ALTITUDE OF 4,500 FEET MSL, ENGINE DEVELOPED A ROUGH RUNNING CONDITION AND THEN QUIT. UPON INSPECTION OF SERVO INJECTOR, FOUND A SEA ## STCs that may be installed (OpenAirDocs) (28) 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 AEIO-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 SE09445SC](https://openairdocs.org/stc/SE09445SC): Installation of fuel injector nozzles. General Aviation Modifications Inc - [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 SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists AEIO-320 Series - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists AEIO-320 Series - [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 SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation - [STC SE00590LA](https://openairdocs.org/stc/SE00590LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models. Nickson's Machine Shop Inc. Lists AEIO-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 AEIO-320 Series - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists AEIO-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 AEIO-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 AEIO-320 Series - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists AEIO-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 AEIO-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.