# Lycoming AEIO-540-D4A5 - Type: Engine model (FAA registry) - Registry code: 41799 - Manufacturer (registry): LYCOMING - Model: AEIO-540-D4A5 - Engine type: Reciprocating - Power: 260 hp - Data sheet: [TCDS 1E4](https://openairdocs.org/tcds/1E4) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 57 registered aircraft - Page: https://openairdocs.org/engine/lycoming-aeio-540-d4a5 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 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 2015-02-07](https://openairdocs.org/ad/2015-02-07): Propeller governor shaft set screw · Lycoming Engines AEIO-320-D1B, AEIO-360-A1E, AEIO-360-A1E6 and 10 more. Effective Mar 11, 2015 - [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 2012-03-06](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 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 2005-19-11](https://openairdocs.org/ad/2005-19-11): Crankshafts · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 59 more. Effective Oct 21, 2005 - [AD 2005-12-06](https://openairdocs.org/ad/2005-12-06): Riveted-impulse coupling assemblies and snap-ring coupling assemblies · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 154 more. Effective Jul 19, 2005 - [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 2004-05-24](https://openairdocs.org/ad/2004-05-24): Zinc-plated Crankshaft Gear Retaining Bolts · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 161 more. Effective Mar 30, 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 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 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 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 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 2006-20-09](https://openairdocs.org/ad/2006-20-09) (historical): Certain crankshafts replacing · Lycoming Engines AEIO-360-A1B6, AEIO-360-A1E6, AEIO-540-D4A5 and 82 more. Effective Nov 3, 2006 - [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 2002-23-06](https://openairdocs.org/ad/2002-23-06) (historical): Crankshaft gear retaining bolts · Textron Lycoming, AVCO AEIO-540, AEIO-540-D4A5, AEIO-540-D4B5 and 46 more. Effective Nov 19, 2002 - [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 ## 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 (57, first 50) - [N110BK](https://openairdocs.org/aircraft/N110BK): [Somes Jason S](https://openairdocs.org/faa-owner/SOMES%20JASON%20S), [Santa Rosa Valley, CA](https://openairdocs.org/faa-place/CA/Santa%20Rosa%20Valley), built 2007, S/N 6077 - [N116LT](https://openairdocs.org/aircraft/N116LT): [Marrow Henry G](https://openairdocs.org/faa-owner/MARROW%20HENRY%20G), [Southern Pines, NC](https://openairdocs.org/faa-place/NC/Southern%20Pines), built 2013, S/N 6090 - [N123FR](https://openairdocs.org/aircraft/N123FR): [Royal Air Flying LLC](https://openairdocs.org/faa-owner/ROYAL%20AIR%20FLYING%20LLC), [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs), S/N 2250 - [N153JP](https://openairdocs.org/aircraft/N153JP): [Pew John R](https://openairdocs.org/faa-owner/PEW%20JOHN%20R), [Casa Grande, AZ](https://openairdocs.org/faa-place/AZ/Casa%20Grande), built 2007, S/N 053 - [N15PU](https://openairdocs.org/aircraft/N15PU): [North Valley Aircraft Inc](https://openairdocs.org/faa-owner/NORTH%20VALLEY%20AIRCRAFT%20INC), [Valley City, ND](https://openairdocs.org/faa-place/ND/Valley%20City), built 1989, S/N 3015 - [N15WA](https://openairdocs.org/aircraft/N15WA): [G Force Aerobatics LLC](https://openairdocs.org/faa-owner/G%20FORCE%20AEROBATICS%20LLC), [Eugene, OR](https://openairdocs.org/faa-place/OR/Eugene), built 1992, S/N 5247 - [N166BJ](https://openairdocs.org/aircraft/N166BJ): [Buddy & Holly LLC](https://openairdocs.org/faa-owner/BUDDY%20%26%20HOLLY%20LLC), [Walnut Creek, CA](https://openairdocs.org/faa-place/CA/Walnut%20Creek), built 2014, S/N 40608 - [N188PS](https://openairdocs.org/aircraft/N188PS): [Blackbird Jet LLC](https://openairdocs.org/faa-owner/BLACKBIRD%20JET%20LLC), [Boca Raton, FL](https://openairdocs.org/faa-place/FL/Boca%20Raton), S/N 6074 - [N1PW](https://openairdocs.org/aircraft/N1PW): [Welkin Aero Inc](https://openairdocs.org/faa-owner/WELKIN%20AERO%20INC), [Garden Plain, KS](https://openairdocs.org/faa-place/KS/Garden%20Plain), built 1979, S/N 1004 - [N203MC](https://openairdocs.org/aircraft/N203MC): [Mac IV Aeroworks LLC](https://openairdocs.org/faa-owner/MAC%20IV%20AEROWORKS%20LLC), [St Petersburg, FL](https://openairdocs.org/faa-place/FL/St%20Petersburg), built 1984, S/N 5036 - [N240KT](https://openairdocs.org/aircraft/N240KT): [Harrelson Don E](https://openairdocs.org/faa-owner/HARRELSON%20DON%20E), [Newnan, GA](https://openairdocs.org/faa-place/GA/Newnan), built 2006, S/N 033 - [N255D](https://openairdocs.org/aircraft/N255D): [Hudec Darryl L](https://openairdocs.org/faa-owner/HUDEC%20DARRYL%20L), [Stone Mountain, GA](https://openairdocs.org/faa-place/GA/Stone%20Mountain), built 2022, S/N 184 - [N260BN](https://openairdocs.org/aircraft/N260BN): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 1989, S/N 5167 - [N260DX](https://openairdocs.org/aircraft/N260DX): [Roquemore William A III](https://openairdocs.org/faa-owner/ROQUEMORE%20WILLIAM%20A%20III), [Hull, GA](https://openairdocs.org/faa-place/GA/Hull), built 1987, S/N 40-019 - [N260EU](https://openairdocs.org/aircraft/N260EU): [Airpower Aviation Resources Inc](https://openairdocs.org/faa-owner/AIRPOWER%20AVIATION%20RESOURCES%20INC), [Newbury Park, CA](https://openairdocs.org/faa-place/CA/Newbury%20Park), built 1991, S/N 784 - [N260GB](https://openairdocs.org/aircraft/N260GB): [Baldassarri Giuseppe](https://openairdocs.org/faa-owner/BALDASSARRI%20GIUSEPPE), [Carrollton, GA](https://openairdocs.org/faa-place/GA/Carrollton), built 1986, S/N 725 - [N260J](https://openairdocs.org/aircraft/N260J): [Rs Hangar 14 LLC](https://openairdocs.org/faa-owner/RS%20HANGAR%2014%20LLC), [El Segundo, CA](https://openairdocs.org/faa-place/CA/El%20Segundo), built 1987, S/N 736 - [N260MJ](https://openairdocs.org/aircraft/N260MJ): [Stoked Aero LLC](https://openairdocs.org/faa-owner/STOKED%20AERO%20LLC), [Camas, WA](https://openairdocs.org/faa-place/WA/Camas), built 1984, S/N 5045 - [N26XD](https://openairdocs.org/aircraft/N26XD): [Gallarate Raymond D](https://openairdocs.org/faa-owner/GALLARATE%20RAYMOND%20D), [Sonoma, CA](https://openairdocs.org/faa-place/CA/Sonoma), built 1987, S/N 40-016 - [N287PJ](https://openairdocs.org/aircraft/N287PJ): [Waterbury Craig A](https://openairdocs.org/faa-owner/WATERBURY%20CRAIG%20A), [El Paso, TX](https://openairdocs.org/faa-place/TX/El%20Paso), built 1994, S/N 5287 - [N291PS](https://openairdocs.org/aircraft/N291PS): [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 1995, S/N 5322 - [N29DZ](https://openairdocs.org/aircraft/N29DZ): [Hotel Charlie LLC](https://openairdocs.org/faa-owner/HOTEL%20CHARLIE%20LLC), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 2017, S/N 129DZ - [N317JK](https://openairdocs.org/aircraft/N317JK): [Kress Dagmar](https://openairdocs.org/faa-owner/KRESS%20DAGMAR), [Parker, CO](https://openairdocs.org/faa-place/CO/Parker), built 2008, S/N 6081 - [N357WC](https://openairdocs.org/aircraft/N357WC): [Ralphs](https://openairdocs.org/faa-owner/RALPHS), [Bakersfield, CA](https://openairdocs.org/faa-place/CA/Bakersfield), S/N 777 - [N364SL](https://openairdocs.org/aircraft/N364SL): [Carmel, CA](https://openairdocs.org/faa-place/CA/Carmel), built 1980, S/N 1011, Registration pending - [N3711P](https://openairdocs.org/aircraft/N3711P): [N8498n LLC](https://openairdocs.org/faa-owner/N8498N%20LLC), [Moore, OK](https://openairdocs.org/faa-place/OK/Moore), built 2023, S/N 01 - [N388PS](https://openairdocs.org/aircraft/N388PS): [Darrow Matthew J](https://openairdocs.org/faa-owner/DARROW%20MATTHEW%20J), [Truckee, CA](https://openairdocs.org/faa-place/CA/Truckee), built 1986, S/N 5116 - [N454JM](https://openairdocs.org/aircraft/N454JM): [Bentlage Roger E](https://openairdocs.org/faa-owner/BENTLAGE%20ROGER%20E), [Marquette, MI](https://openairdocs.org/faa-place/MI/Marquette), built 2007, S/N 6076 - [N495KC](https://openairdocs.org/aircraft/N495KC): [Argenta Acquisitions LLC](https://openairdocs.org/faa-owner/ARGENTA%20ACQUISITIONS%20LLC), [Little Rock, AR](https://openairdocs.org/faa-place/AR/Little%20Rock), built 2019, S/N 41395 - [N511MF](https://openairdocs.org/aircraft/N511MF): [Eastern Stearman Inc Trustee](https://openairdocs.org/faa-owner/EASTERN%20STEARMAN%20INC%20TRUSTEE), [Leesburg, VA](https://openairdocs.org/faa-place/VA/Leesburg), built 1988, S/N 5149 - [N511TD](https://openairdocs.org/aircraft/N511TD): [23nv LLC](https://openairdocs.org/faa-owner/23NV%20LLC), [Grinnell, IA](https://openairdocs.org/faa-place/IA/Grinnell), built 2002, S/N 2266 - [N512KW](https://openairdocs.org/aircraft/N512KW): [Down Three Green LLC](https://openairdocs.org/faa-owner/DOWN%20THREE%20GREEN%20LLC), [Liberty, TN](https://openairdocs.org/faa-place/TN/Liberty), built 1996, S/N 2246 - [N51PS](https://openairdocs.org/aircraft/N51PS): [Eastern Stearman Inc Trustee](https://openairdocs.org/faa-owner/EASTERN%20STEARMAN%20INC%20TRUSTEE), [Leesburg, VA](https://openairdocs.org/faa-place/VA/Leesburg), built 2010, S/N 6087 - [N524MD](https://openairdocs.org/aircraft/N524MD): [Stick N Rudder LLC](https://openairdocs.org/faa-owner/STICK%20N%20RUDDER%20LLC), [Kensington, NH](https://openairdocs.org/faa-place/NH/Kensington), built 1995, S/N 5309 - [N52SX](https://openairdocs.org/aircraft/N52SX): [Burrill Joel S](https://openairdocs.org/faa-owner/BURRILL%20JOEL%20S), [Merritt Island, FL](https://openairdocs.org/faa-place/FL/Merritt%20Island), built 1986, S/N 002HB - [N5327C](https://openairdocs.org/aircraft/N5327C): [Tolleson Charles B Jr](https://openairdocs.org/faa-owner/TOLLESON%20CHARLES%20B%20JR), [Carpentersville, IL](https://openairdocs.org/faa-place/IL/Carpentersville), built 1985, S/N 5050 - [N540BH](https://openairdocs.org/aircraft/N540BH): [Extreme Attitude Recovery & Aerobatics LLC](https://openairdocs.org/faa-owner/EXTREME%20ATTITUDE%20RECOVERY%20%26%20AEROBATICS%20LLC), [Cincinnati, OH](https://openairdocs.org/faa-place/OH/Cincinnati), built 2000, S/N 6033 - [N540XS](https://openairdocs.org/aircraft/N540XS): [Southern Aircraft Consultancy Inc Trustee](https://openairdocs.org/faa-owner/SOUTHERN%20AIRCRAFT%20CONSULTANCY%20INC%20TRUSTEE), [Casper, WY](https://openairdocs.org/faa-place/WY/Casper), built 2008, S/N 2 - [N545EA](https://openairdocs.org/aircraft/N545EA): [Brad Wursten Airshows](https://openairdocs.org/faa-owner/BRAD%20WURSTEN%20AIRSHOWS), [Logan, UT](https://openairdocs.org/faa-place/UT/Logan), built 2009, S/N 9 - [N597TJ](https://openairdocs.org/aircraft/N597TJ): [Jt Airshows](https://openairdocs.org/faa-owner/JT%20AIRSHOWS), [Slidell, TX](https://openairdocs.org/faa-place/TX/Slidell), built 1995, S/N 5325 - [N60JL](https://openairdocs.org/aircraft/N60JL): [Leluc Jerome](https://openairdocs.org/faa-owner/LELUC%20JEROME), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 1985, S/N 5086 - [N610LT](https://openairdocs.org/aircraft/N610LT): built 2026, S/N 40529 - [N661AS](https://openairdocs.org/aircraft/N661AS): [Saldarriaga Alvaro](https://openairdocs.org/faa-owner/SALDARRIAGA%20ALVARO), [Ocala, FL](https://openairdocs.org/faa-place/FL/Ocala), built 2025, S/N 6093 - [N68TS](https://openairdocs.org/aircraft/N68TS): [Smith Timothy R](https://openairdocs.org/faa-owner/SMITH%20TIMOTHY%20R), [Victoria, TX](https://openairdocs.org/faa-place/TX/Victoria), built 1981, S/N 1013 - [N69JX](https://openairdocs.org/aircraft/N69JX): [Ac Holdings II Inc](https://openairdocs.org/faa-owner/AC%20HOLDINGS%20II%20INC), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 2015, S/N SN69 - [N706RV](https://openairdocs.org/aircraft/N706RV): [Kks Aviation LLC](https://openairdocs.org/faa-owner/KKS%20AVIATION%20LLC), [Spokane, WA](https://openairdocs.org/faa-place/WA/Spokane), built 2009, S/N 40475 - [N727AZ](https://openairdocs.org/aircraft/N727AZ): [Lazy 8 Aerobatics LLC](https://openairdocs.org/faa-owner/LAZY%208%20AEROBATICS%20LLC), [Cushing, ME](https://openairdocs.org/faa-place/ME/Cushing), built 2008, S/N 6080 - [N747XP](https://openairdocs.org/aircraft/N747XP): [Cela Sokol](https://openairdocs.org/faa-owner/CELA%20SOKOL), [Clarksville, TN](https://openairdocs.org/faa-place/TN/Clarksville), built 2002, S/N 2268 - [N789FR](https://openairdocs.org/aircraft/N789FR): [Brookshire, TX](https://openairdocs.org/faa-place/TX/Brookshire), built 1996, S/N 2240, Registration pending, pending cancellation - [N80PS](https://openairdocs.org/aircraft/N80PS): [Meyer Benjamin R](https://openairdocs.org/faa-owner/MEYER%20BENJAMIN%20R), [Glenburn, ME](https://openairdocs.org/faa-place/ME/Glenburn), built 1980, S/N 1009 All 57: https://openairdocs.org/engine/lycoming-aeio-540-d4a5/aircraft.md ## NTSB investigations (4) 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 CEN23LA222](https://openairdocs.org/ntsb/CEN23LA222), Jun 3, 2023: Pitts S-2S (N1PW), Garden Plain, KS, substantial damage. Probable cause: The pilot’s inability to maintain directional control during landing roll due to a flat tire. - [NTSB WPR15FA021](https://openairdocs.org/ntsb/WPR15FA021), Oct 24, 2014: Slingsby T67M 260 (N456FR), Ridgecrest, CA, substantial damage, 2 fatal. Probable cause: The pilots' failure to recover from a spin for reasons that could not be determined based on available information. Contributing to the student's fatal injury was his delayed egress from the airplane… - [NTSB ERA14LA383](https://openairdocs.org/ntsb/ERA14LA383), Aug 12, 2014: Christen Industries Pitts S (N50XV), Sarasota, FL, substantial damage. Probable cause: A total loss of engine power due to fuel exhaustion, which resulted from the flight instructor's inadequate preflight fuel planning. - [NTSB CEN13CA077](https://openairdocs.org/ntsb/CEN13CA077), Nov 24, 2012: Christen Industries Pitts S-2S (N15PU), Grain Valley, MO, substantial damage. Probable cause: The pilot's improper landing flare, which led to a bounced landing and subsequent loss of control. ## FAA accident and incident reports (7) 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 20230603006219A](https://openairdocs.org/incident/20230603006219A), Jun 3, 2023: Pitts S-2S (N1PW), Garden Plain, KS, Substantial damage. During landing on grass strip at SN61, the right tire failed on landing rollout causing the aircraft nose to pitch forward striking the ground with the… - [Incident 20220602009319I](https://openairdocs.org/incident/20220602009319I), Jun 2, 2022: Aviat Aircraft Inc PITTS S-2C (N317JK), Centennial, CO, Minor damage. On June 2, 2022 at 2120Z aircraft [privacy data omitted],a pitts S-2C, departed runway 28 at Centennial Airport and struck a runway sign causing damage to the… - [Incident 20151017019359I](https://openairdocs.org/incident/20151017019359I), Oct 17, 2015: Mxr Technologies Inc MXS (N540XS), Las Vegas, NV, Minor damage. Pilot misjudged landing descent rate during gusty winds while touching down on the landing surface. The RH main gear bent and flexed allowing the three… - [Accident 20141024021049A](https://openairdocs.org/incident/20141024021049A), Oct 24, 2014: Slingsby T67M-260 (N456FR), Randsburg, CA, Destroyed, 2 fatal. While performing spin training from an altitude of 11,200 fat, N456FR, operated by the national test pilot school, was unable to recover from the spin prior to… - [Accident 20140812015089A](https://openairdocs.org/incident/20140812015089A), Aug 12, 2014: Christen Industries Inc PITTS S-2B (N50XV), Sarasota, FL, Substantial damage. On 8/12/2014 the pilot was operating aircraft N50XV and he departed Sarasota airport at around 11:05 am accompanied by a passenger. The pilot stated they… - [Accident 20121124028069A](https://openairdocs.org/incident/20121124028069A), Nov 24, 2012: Christen Industries Inc PITTS S-2S (N15PU), Grain Valley, MO, Substantial damage. After 30 min of flying in the practice area, the PIC returned for landing. At touchdown on rwy 9 with a right x/wind, he applied aft stick to "pin" the tail… - [Incident 19920618025129I](https://openairdocs.org/incident/19920618025129I), Jun 18, 1992: Child S2PITTS (N1PW), Olathe, KS. Tail wheel failed on landing roll. No damage to aircraft. ## Service difficulty reports (61, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR CA150504001](https://openairdocs.org/sdr/CA150504001), May 3, 2015: CONTROL TUBE. DAMAGED. (CAN) COCKPIT CONTROL TUBE ASSEMBLY RUBBING ON INTERNAL VHF COMM ANTENNA DOUBLER: INVESTIGATION FOUND THAT DUE TO THE LIGHT GAUGE, 0.025", OF BOTTOM AFT PANEL A - [SDR CA120530005](https://openairdocs.org/sdr/CA120530005), May 25, 2012: PITOT TUBE. CONTAMINATED. (CAN) PITOT HEAT CAUTION LIGHT AFTER 20 MINS OF USE. DUE TO HEAVY RAINS, THE PITOT STATIC TUBE ASSY, SUPPORT ASSY, FILLED UP WITH WATER. THE WATER CAUSED A SHOR - [SDR CA111128005](https://openairdocs.org/sdr/CA111128005), Nov 28, 2011: CONTROL ROD. GOUGED. (CAN) ELEVATOR TRIM ROD, 120A-4441, HAS TWO SPOTS WHERE BOLTS FROM THE ELEVATOR CONTROL ROD, 120A-4441, WERE GOUGING INTO THE ROD WHEN THE SYS WAS BEING OPERATE - [SDR CA111021009](https://openairdocs.org/sdr/CA111021009), Oct 21, 2011: FORK. CRACKED. (CAN) ON LANDING, THE TAIL WHEEL FORK DEPARTED THE ACFT AS IT CRACKED THE CAST ALUMINUM FORK THAT THE TAIL WHEEL AXLE GOES THROUGH. THE ACFT LANDED WITH NO FURT - [SDR CA110920010](https://openairdocs.org/sdr/CA110920010), Sep 20, 2011: HOSE. WORN. (CAN) DURING A LEAK TEST OF THE AIR CONDITIONING, IT WAS DISCOVERED THAT THE MAIN DELIVERY HOSE HAD A LEAK AND REQUIRED REPLACEMENT. THE AFFECTED HOSE IS LOCATE - [SDR CA111019019](https://openairdocs.org/sdr/CA111019019), Aug 6, 2011: PUMP. UNSECURE. (CAN) THE PILOT WAS PERFORMING AN AEROBATIC ROUTINE DURING AN AIRSHOW. WHILE PULLING THE POWER OFF TO PERFORM A TAIL SLIDE THE ENGINE QUIT. THE PILOT DECLARED A - [SDR CA101021009](https://openairdocs.org/sdr/CA101021009), Oct 20, 2010: WASHER. MISSING. DURING A 200 HR INSP ON 2 OTHER ACFT, MSB 1121-109/1 WAS BEING CARRIED OUT AS REQUIRED WHEN IT WAS NOTED THAT THE WASHERS WERE MISSING. THE MFG WAS CONTACTED AN - [SDR CA090618012](https://openairdocs.org/sdr/CA090618012), Jun 4, 2009: INDICATOR. UNSERVICEABLE. (CAN) DURING PITOT/STATIC GROUND FUNCTION TEST, IT WAS NOTED THAT PILOTS (AFT) AIRSPEED INDICATOR WOULD ACCURATELY INDICATE AN INCREASE IN AIRSPEED BUT WOULD NO - [SDR CA090515001](https://openairdocs.org/sdr/CA090515001), May 15, 2009: TUBE. DAMAGED. (CAN) 4130 N FUSELAGE DIAGONAL TUBE PN 2-2100-241 FOUND DAMAGED BY IMPROPER CLEARANCE OF INSTALLED HARWARE OF THE FORWARD POSITION LT RUDDER PEDAL PIVOT BOLT AN - [SDR CA090515002](https://openairdocs.org/sdr/CA090515002), May 15, 2009: AILERON. OBSTRUCTED. (CAN) INSP OF THE CONTROL SURFACES FOUND THAT AILERONS DO NOT MAKE TRAVEL LIMITS AND PUSH RODS ARE HITTING FWD SPARS OF THE LWR WINGS. ELEVATOR TAB IS UNABLE TO - [SDR R019184](https://openairdocs.org/sdr/R019184), Mar 6, 2006: BUSHING. LOOSE. CUSTOMER REMOVED PROP DUE TO OIL LEAKING FROM BLADE. DISASSEMBLY OF THE PROPELLER REVEALED A LOOSE PITCH CHANGE ROD BORE BUSHING CAUSING THE OIL LEAK. THE PC RO - [SDR 2004FA0000229](https://openairdocs.org/sdr/2004FA0000229), Feb 17, 2004: DOPE FILM. DELAMINATED. ALL OF THE DOPE FILM DELAMINATED FROM THE CECONITE 102 FABRIC. AFTER SEVERAL PHONE CALLS, IT WAS DETERMINED THAT IMPROPER APPLICATION METHOD WAS USED. THE RANDO - [SDR 2003FA0001026](https://openairdocs.org/sdr/2003FA0001026), Sep 30, 2003: CYLINDER. WRONG PART. DURING A ANNUAL INSPECTION, FOUND THE NR 1 CYLINDER TO BE INCORRECT FOR THIS INSTALLATION, INCORRECT CYLINDER INSTALLED MFG PRIOR TO INSTALLATION ON AIRCRAFT. C - [SDR 2003FA0000731](https://openairdocs.org/sdr/2003FA0000731), Jun 13, 2003: PROBE. FAILED. ON GROUND RUN-UP EGT INDICATOR FLUCTUATED 25 DEGREES. ON FURTHER INVESTIGATION FOUND CARBON ON END OF PROBE. - [SDR 2003FA0000392](https://openairdocs.org/sdr/2003FA0000392), Apr 7, 2003: BEARING. FAILED. DURING PROGRESSIVE INSPECTION OF THE AIRCRAFT THERE WAS A STRANGE SOUND FROM THE AILERON SYSTEM. FURTHER INVESTIGATION REVEALED THAT THE BEARING FROM THE LT AIL - [SDR 2003FA0000073](https://openairdocs.org/sdr/2003FA0000073), Jan 16, 2003: DISTRIBUTOR BLK. INOPERATIVE. MAGNETO REMOVED FROM ENGINE FOR 500 HOUR INSPECTION IAW MM. DURING INSPECTION FOUND THAT THE CARBON BRUSH HAS EXCESSIVE WEAR. BECAUSE OF THIS EXCESSIVE WEAR IT - [SDR VJ32003F00004](https://openairdocs.org/sdr/VJ32003F00004), Dec 9, 2002: HANDLE. SHORTED. LANDING GEAR HANDLE COULD NOT BE SELECTED TO THE UP POSITION AFTER PROGRESSIVE INSPECTION WAS PERFORMED ON AIRCRAFT BY MAINTENANCE. BELIEVE THAT HANDLE HAS A SH - [SDR VJ32003F00007](https://openairdocs.org/sdr/VJ32003F00007), Dec 9, 2002: MOTOR. INOPERATIVE. DURING PROGRESSIVE INSPECTION AND CYCLING THE GEAR THE HYDRAULIC PUMP RCCB CIRCUIT BREAKER WOULD POP. THE HYDRAULIC MOTOR ON THE HYDRAULIC PUMP UNIT WAS PUTTING - [SDR VJ32003F00009](https://openairdocs.org/sdr/VJ32003F00009), Dec 9, 2002: RELAY. SHORTED. DURING PROGRESSIVE INSPECTION AND CYCLE OF THE LANDING GEAR, WE HAD A FAILURE OCCUR. FOUND A BAD HYD. CONTROL RELAY THAT SHORTED. BECAUSE OF THAT SHORT, IT ALLO - [SDR VJ32003F00003](https://openairdocs.org/sdr/VJ32003F00003), Dec 4, 2002: SHOCK MOUNT. DAMAGED. DURING PROGRESSIVE INSPECTION OF ENGINE BAY, FOUND LOWER LEFT LORD MOUNT DAMAGED FROM HEAT OF EXHAUST SYSTEM. SUGGEST INSTALLING SOME TYPE OF HEAT SHIELDING OR - [SDR VJ32003F00005](https://openairdocs.org/sdr/VJ32003F00005), Dec 4, 2002: SHOCK MOUNT. DAMAGED. DURING PROGRESSIVE INSPECTION OF ENGINE BAY FOUND LOWER LT MOUNT DAMAGED FROM HEAT OF EXHAUST SYSTEM. SUGGEST INSTALLING SOME TYPE OF HEAT SHIELDING OR CHANGING - [SDR VJ32002F00065](https://openairdocs.org/sdr/VJ32002F00065), Sep 6, 2002: DOWNLOCK SWITCH. FAILED. DOWN SWITCH FAILED CAUSING NO DOWN INDICATION OF NOSE GEAR IN THE DOWN POSITION. - [SDR VJ32002F00066](https://openairdocs.org/sdr/VJ32002F00066), Sep 6, 2002: HANDLE. FAILED. GEAR HANDLE EXPERIENCED INTERNAL FAILURE CAUSING MALFUNCTION OF THE HYDRAULIC GEAR PUMP. WHEN THE PUSH TO TEST BUTTON WAS PRESSED FOR THE ANNUNCIATOR PANEL, THE - [SDR VJ32002F00068](https://openairdocs.org/sdr/VJ32002F00068), Sep 6, 2002: SENSOR. BROKEN. RPM INDICATION SENSOR RING FOUND BROKEN DURING ROUTINE INSPECTION. THIS SENSOR RING FITS UNDER THE VENT OF THE RIGHT MAGNETO AND PROVIDES ENGINE RPM INDICATIONS - [SDR VJ32002F00044](https://openairdocs.org/sdr/VJ32002F00044), May 21, 2002: BAFFLE. CRACKED. ENGINE BAFFLE CRACKED ON NUMBER 1 CYLINDER. PART REMOVED AND NEW BAFFLE INSTALLED. - [SDR VJ32002F00045](https://openairdocs.org/sdr/VJ32002F00045), May 21, 2002: PUMP. FAILED. IN FLIGHT THE INSTRUMENT VACUUM SYSTEM FAIL. THE AIRCRAFT RETURNED TO MAINTENANCE AND AN INSPECTION OF THE SYSTEM FOUNDED THAT THE ROTOR HAD FROZEN UP AND THE S - [SDR VJ32002F00039](https://openairdocs.org/sdr/VJ32002F00039), May 20, 2002: ROD. CHAFED. AILERON ROD RUBBING AILERON BELL CRANK. REMOVED ROD AND INSTALLED NEW ROD. CONTROL ASSEMBLY WAS SHIMMED TO CORRECT THE PROBLEM. - [SDR VJ32002F00040](https://openairdocs.org/sdr/VJ32002F00040), May 20, 2002: ROD. CHAFED. ELEVATOR CONTROL ROD RUBBING AILERON CROSS OVER TUBE. REMOVED TUBE AND INSTALLED NEW TUBE. NEW SHIM PLATES INSTALLED, TO CORRECT PROBLEM. - [SDR VJ32002F00041](https://openairdocs.org/sdr/VJ32002F00041), May 20, 2002: CLOCK. BROKEN. LEFT HAND STOP PIN BROKEN OFF. REMOVED AND REPLACED NEW CLOCK. - [SDR VJ32002F00038](https://openairdocs.org/sdr/VJ32002F00038), May 16, 2002: PUMP. FAILED. IN FLIGHT, THE INSTRUMENT VACUUM SYSTEM FAILED. THE AIRCRAFT RETURNED TO MAINTENANCE AND AN INSPECTION OF THE SYSTEM FOUNDED THAT THE ROTOR HAD FROZEN UP AND TH - [SDR VJ32002F00043](https://openairdocs.org/sdr/VJ32002F00043), May 16, 2002: BAFFLE. CRACKED. ENGINE BAFFLE CRACKED ON NUMBER 1 CYLINDER. PART REMOVED AND NEW BAFFLE INSTALLED. - [SDR VJ32002F00042](https://openairdocs.org/sdr/VJ32002F00042), May 15, 2002: PUMP. BURNED OUT. LANDING GEAR FAILED, WHEN THE GEAR WAS SELECTED TO THE UP POSITION AFTER TAKE OFF. THE GEAR WAS LOWER AND A SAFE LANDING WAS MADE. INSPECTION OF THE GEAR SYSTEM - [SDR VJ32002F00036](https://openairdocs.org/sdr/VJ32002F00036), May 10, 2002: PUMP. FAILED. IN FLIGHT, THE LANDING GEAR HYDRAULIC PUMP CIRCUIT BREAKER POPPED WITH THE GEAR UP, THE GEAR WAS LOWERED AND A SAFE LANDING WAS MADE. AIRCRAFT WAS PLACED ON JAC - [SDR VJ32002F00031](https://openairdocs.org/sdr/VJ32002F00031), May 7, 2002: PUMP. INOPERATIVE. AT 800 RPM THE FUEL PRESSURE DROPS BELOW MINIMUM AND THE LOW PRESSURE LIGHT CAME ON AT IDLE. SYSTEM WAS CHECKED AND FOUND THAT THE PUMP OUT PUT WAS LOW. PUMP RE - [SDR VJ32002F00032](https://openairdocs.org/sdr/VJ32002F00032), May 7, 2002: PUMP. SHEARED. METAL SHAFT SHEARED IN PUMP. REMOVED AND INSTALLED NEW PUMP, SYSTEM OPERATIONAL CHECKED NORMAL. PUMP SENT IN FOR WARRANTY. - [SDR VJ32002F00033](https://openairdocs.org/sdr/VJ32002F00033), May 6, 2002: BAFFLE. CRACKED. ENGINE BAFFLE CRACKED ON NUMBER 3 CYLINDER. PART REMOVED AND NEW BAFFLE INSTALLED. PART SENT IN FOR WARRANTY. - [SDR VJ32002F00034](https://openairdocs.org/sdr/VJ32002F00034), May 6, 2002: BAFFLE. CRACKED. ENGINE BAFFLE CRACKED ON NUMBER 3 CYLINDER. PART REMOVED AND NEW BAFFLE INSTALLED. PART SENT IN FOR WARRANTY. - [SDR VJ32002F00029](https://openairdocs.org/sdr/VJ32002F00029), Apr 26, 2002: BRACKET. CRACKED. ALTERNATOR SUPPORT BRACKET CRACKED. PART REMOVED AND A NEW SUPPORT BRACKET INSTALLED. PART SENT IN FOR WARRANTY. - [SDR 2002FA0000515](https://openairdocs.org/sdr/2002FA0000515), Apr 15, 2002: PUMP. FAILED. THE LANDING GEAR WAS SWLECTED IN FLIGHT TO THE DOWN POSITION; THE RIGHT MAIN GEAR LIGHT FAILED TO COME ON IN THE DOWN AND LOCKED POSITION. THE AIRCRAFT WAS YAWE - [SDR 2002FA0000514](https://openairdocs.org/sdr/2002FA0000514), Apr 12, 2002: HANDLE. FAILED. LANDING GEAR WAS CYCLED TO THE DOWN POSITION IN FLIGHT, BOTH MAIN GEAR DOWN LIGHTS CAME ON AND THE NOSE GEAR DOWN LIGHTS CAME ON AND THE NOSE GEAR DOWN LIGHTS F - [SDR 2002FA0000484](https://openairdocs.org/sdr/2002FA0000484), Apr 5, 2002: AUDIO PANEL. FAILED. AUDIO PANEL FAIL INTERNALLY GIVING AND UNSAFE GEAR INDICATION LIGHT, AND WHEN THE THROTTLE WAS PULLED TO IDLE, THE HYDRAULIC PUMP WOULD START TO RUN. REMOVED AN - [SDR 2002FA0000474](https://openairdocs.org/sdr/2002FA0000474), Apr 2, 2002: SWITCH. FAILED. MAGNETO SWITCH FAILED TO START ENGINE, FOUND BAD SWITCH. NEW SWITCH INSTALLED, OPERATIONAL CHECKED NORMAL. PART SENT IN FOR WARRANTY. - [SDR 2002FA0000481](https://openairdocs.org/sdr/2002FA0000481), Apr 2, 2002: ACTUATOR. FAILED. NOSE LANDING GEAR HYDRAULIC ACTUATOR BOTTOM SEAL AROUND SHAFT BLOW OUT AND LEAKING FLUID FROM CYLINDER. ACTUATOR REMOVED AND A NEW ACTUATOR INSTALLED. ACTUATOR - [SDR 2002FA0000477](https://openairdocs.org/sdr/2002FA0000477), Apr 1, 2002: PIN. BROKEN. LEFT HAND STOP PIN BROKEN OFF, REMOVED AND INSTALLED NEW CLOCK. PART SENT IN FOR WARRANTY. - [SDR 2002FA0000478](https://openairdocs.org/sdr/2002FA0000478), Apr 1, 2002: PUMP. DAMAGED. METAL SHAFT SHEARED IN PUMP. REMOVED AND INSTALLED NEW PUMP, SYSTEM OPERATIONAL CHECKED NORMAL. PUMP SENT IN FOR WARRANTY. - [SDR 2002FA0000480](https://openairdocs.org/sdr/2002FA0000480), Apr 1, 2002: SERVO. STICKING. TRIM SERVO STICKING IN OPERATION AND FAILS TO MOVE THE AILERON TRIM TAB. REMOVED AND INSTALLED NEW TRIM SERVO ASSEMBLY. PART SENT IN FOR WARRANTY. - [SDR 2002FA0000482](https://openairdocs.org/sdr/2002FA0000482), Apr 1, 2002: PUMP. INOPERATIVE. ELECTRIC MOTOR SLOW IN FLIGHT, OVER 25 TO 30 SECONDS TO RETRACT AND EXTENT THE LANDING GEAR. NEW HYDRAULIC PUMP ASSEMBLY INSTALLED, CYCLED GEAR IAW MAINTENANCE - [SDR 2002FA0000483](https://openairdocs.org/sdr/2002FA0000483), Apr 1, 2002: FILTER. INOPERATIVE. FEED BACK IN THE RADIOS, NEW FILTER INSTALLED, OPERATIONAL CHECK NORMAL. PART SENT IN FOR WARRANTY. - [SDR 2003FA0001092](https://openairdocs.org/sdr/2003FA0001092), Jul 1, 2001: FLANGE. CRACKED. FOUND CRACKED CRANKSHAFT FLANGE. INSTALLED 3 BLADE MT PROP TO DECREASE STRESS ON CRANKSHAFT.(K) - [SDR 2003FA0001091](https://openairdocs.org/sdr/2003FA0001091), Jun 1, 2001: FLANGE. CRACKED. FOUND CRACKED CRANKSHAFT FLANGE. INSTALLED 3 BLADE PROP TO DECREASE STRESS ON CRANKSHAFT. All 61: https://openairdocs.org/engine/lycoming-aeio-540-d4a5/reports.md ## STCs that may be installed (OpenAirDocs) (22) 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 SE2387CE](https://openairdocs.org/stc/SE2387CE): Installation of B & C Speciality Products lightweight (10.2 pounds) engine starter P/N BC 315-100-1(12 volt) or P/N BC 315-100-3(24 volt). B & C Specialty Products Inc. Lists AEIO-540 Series - [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc - [STC SE01436LA](https://openairdocs.org/stc/SE01436LA): Installation of Firewall Forward Technologies LLC modified camshaft. Centri-lube Technologies LLC - [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 - [STC SE00768CH](https://openairdocs.org/stc/SE00768CH): Replace Slick 6000, 6100, 6200 and 6300 series magnetos and TCM/Bendix S6-20, S6-200 and S6-1200 series magnetos with the Champion Limited Authority Spark Advance Regulator (LASARTM) ignition system. Champion Aerospace 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 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 SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc - [STC SE7734SW](https://openairdocs.org/stc/SE7734SW): Modification of engine for operation with ethanol fuel. Shauck Dr Maxwell E Jr - [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 AEIO-540 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-540 Series - [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC ## 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. - [72-231114-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157761992320260722204351.0001): TAG-Engine. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 17, 2026 - [AB-160844](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100141747720251216184413.0001): Spring & Brush Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces 10-160844 · Nov 10, 2025 - [OC](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178549155320250923184433.0001): Oil Cooler Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Sep 12, 2025 - [AE45BS-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173583138520250908153031.0001): Brush Rack Assembly. Aerospace Turbine Rotables · PMA PQ3736CE · Replaces Prestolite Part Number ALU-1045BS · Aug 27, 2025 - [SL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151538433320250923185921.0001): Engine Preheat Kit. Hartzell Propeller LLC · PMA PQ2040CE · Modification part · Aug 4, 2025 - [TXPL6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146504457020250923185923.0001): 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 - [FFT-PLG-003](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195538759920240801144311.0001): Cam End Plug. Centri-Lube Technologies LLC · PMA PQ2043NM · Modification part · Jul 16, 2024 - [FFT-PLG-004](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162830829420240801144312.0001): Cam End Plug. Centri-Lube Technologies LLC · PMA PQ2043NM · Modification part · Jul 16, 2024 - [AA48111-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120682187320240813134136.0001): Oil Filter. Aero Accessories LLC · PMA PQ1206CE · Replaces Aero AccessoriesAA48111Champion… · Jul 12, 2024 - [CF73966](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178353257420240715164040.0001): Spacer. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 73966 · Jun 24, 2024 - [CF07A23031](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID136616521920240715164043.0001): Bracket, Fuel Manifold. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces 07A23031 · Jun 24, 2024 - [CFSTD-251](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129676558220240715164045.0001): Washer, #10 Lock, Internal Teeth. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-251 · Jun 24, 2024 - [CFSTD-82](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123933662120240715164045.0001): Screw, #10-24 X 1/2, RD HD. PRECISION AIRMOTIVE LLC · PMA PQ0111NM · Replaces STD-82 · Jun 24, 2024 - [ES3018](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194884707820251216184204.0001): Clamp, Bearing Cap. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3018 · May 20, 2024 - [AM-3021](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194256093820251216184144.0001): Screw Distributor Block. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3021 · May 20, 2024 - [ES5617](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID190223284620251216184226.0001): Machining, Rotating Magnet. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M5617 · May 20, 2024 - [ES3221](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID189601053820251216184228.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3221 · May 20, 2024 - [AK-3975](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181109606820251216184201.0001): Coil, Ignition. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3009, M3114, M3525, K3975, K3975 · May 20, 2024 - [AM-3015](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180990573320251216184149.0001): Screw, Housing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3015 · May 20, 2024 - [AM-3006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178460806720251216184151.0001): Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3006 · May 20, 2024 - [AM2536](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175576430320251216184152.0001): Woodruff Key. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2536 · May 20, 2024 - [ES3040](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175045989620251216184205.0001): Coil Wedge. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3040 · May 20, 2024 - [AK-3984](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168254730520251216184200.0001): Capacitor. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3183, K3984 · May 20, 2024 - [AM-2556](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID164604517920251216184155.0001): Cotter Pin. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M2556 · May 20, 2024 - [ES3637K](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163564757720251216184213.0001): Contact Point Secondary. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3637 · May 20, 2024 - [ES3084](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID152458666320251216184211.0001): Air Vent With Hood. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3084 · May 20, 2024 - [AM-3217](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID152412216720251216184157.0001): Wave Spring Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M-3217 · May 20, 2024 - [AM-3485](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151878274520251216184156.0001): Bearing Cap, Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3485 · May 20, 2024 - [AM-3215](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151335825620251216184148.0001): Brush Assy, Distributor. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3215 · May 20, 2024 - [ES3823](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146282172620251216184219.0001): Dist. Block & Gear Assy.. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces K3823 · May 20, 2024 - [ES3331](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142668191320251216184207.0001): Oil Seal. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3331 · May 20, 2024 - [ES3828](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141865244620251216184221.0001): Rotor Gear. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces K3828 · May 20, 2024 - [AM-3020](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134367835920251216184146.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3020 · May 20, 2024 - [ES1077](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132381862220251216184212.0001): Air Vent. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M1077 · May 20, 2024 - [AM3611](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125128266220251216184158.0001): Cam. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3611, M1522 · May 20, 2024 - [ES3826](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID112237278720251216184206.0001): Spacer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3826 · May 20, 2024 - [ES3630](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID108310017320251216184222.0001): Bearing Cap, Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3630, K3630 · May 20, 2024 - [A-13081K](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103306043420251216184147.0001): Contact Assembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3081 · May 20, 2024 - [ES3019](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100047104220251216184208.0001): Nut. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces M3019 · May 20, 2024 - [AB-382585](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195988018720251216184453.0001): Ignition ContactAssembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-382585 · Dec 8, 2023 - [AB-157160](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193485923720251216184437.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-157160 · Dec 8, 2023 - [AB-400623](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID193069304920251216184444.0001): Ball Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental… · Dec 8, 2023 - [AB-51678](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192819677720251216184507.0001): Oil Deflector. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-51678 · Dec 8, 2023 - [ES10-35936-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191691087420251216184428.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-35936-7 · Dec 8, 2023 - [AB-357586](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182632077520251216184446.0001): Gear. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-357586 · Dec 8, 2023 - [ES10-35937-8](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181846469020251216184431.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-35937-8 · Dec 8, 2023 - [ES10-35935-6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180932652920251216184430.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-35935-6 · Dec 8, 2023 - [AB-50765](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176916822920251216184507.0001): Clamp. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-50765 · Dec 8, 2023 - [AB-606505](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175976763420251216184439.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-606505 · Dec 8, 2023 All of them: https://openairdocs.org/engine/lycoming-aeio-540-d4a5/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.