# Lycoming O-540-B2C5

- Type: Engine model (FAA registry)
- Registry code: 42338
- Manufacturer (registry): LYCOMING
- Model: O-540-B2C5
- Engine type: Reciprocating
- Power: 235 hp
- Data sheet: [TCDS E-295](https://openairdocs.org/tcds/E-295) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 13 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-o-540-b2c5

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 2026-17-10](https://openairdocs.org/ad/2026-17-10): Reciprocating Engine Cylinder Section · Lycoming Engines O-235, O-235-A, O-235-AP and 159 more. Effective Sep 14, 2026
- [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 2022-16-03](https://openairdocs.org/ad/2022-16-03): Engine (RECIPROCATING) · Continental Aerospace Technologies GTSIO-520-C, GTSIO-520-D, GTSIO-520-F and 236 more. Effective Aug 15, 2022
- [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 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 99-04-04](https://openairdocs.org/ad/99-04-04): Impulse Coupling Pawl · Lycoming Engines IO-540-K1A5, IO-540-K1B5, IO-540-K1G5 and 6 more. Effective Feb 25, 1999
- [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 95-07-01](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 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 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 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 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 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 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 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 (13)

- [N14525](https://openairdocs.org/aircraft/N14525): [Tropeano Joseph P](https://openairdocs.org/faa-owner/TROPEANO%20JOSEPH%20P), [Ocala, FL](https://openairdocs.org/faa-place/FL/Ocala), built 1977, S/N 487
- [N4333Y](https://openairdocs.org/aircraft/N4333Y): [Evergreen Soaring Inc](https://openairdocs.org/faa-owner/EVERGREEN%20SOARING%20INC), [Lynnwood, WA](https://openairdocs.org/faa-place/WA/Lynnwood), built 1968, S/N 25-4824
- [N4593Y](https://openairdocs.org/aircraft/N4593Y): [Soaring Society Of Boulder](https://openairdocs.org/faa-owner/SOARING%20SOCIETY%20OF%20BOULDER), [Boulder, CO](https://openairdocs.org/faa-place/CO/Boulder), built 1967, S/N 25-4278
- [N4606Y](https://openairdocs.org/aircraft/N4606Y): [Adirondack Soaring Association Inc](https://openairdocs.org/faa-owner/ADIRONDACK%20SOARING%20ASSOCIATION%20INC), [Ballston Spa, NY](https://openairdocs.org/faa-place/NY/Ballston%20Spa), built 1967, S/N 25-4303
- [N4669Y](https://openairdocs.org/aircraft/N4669Y): [Hollister Soaring Center LLC](https://openairdocs.org/faa-owner/HOLLISTER%20SOARING%20CENTER%20LLC), [Hollister, CA](https://openairdocs.org/faa-place/CA/Hollister), built 1967, S/N 25-4392
- [N4748Y](https://openairdocs.org/aircraft/N4748Y): [Memphis Soaring Society](https://openairdocs.org/faa-owner/MEMPHIS%20SOARING%20SOCIETY), [Memphis, TN](https://openairdocs.org/faa-place/TN/Memphis), built 1968, S/N 25-4504
- [N4983Y](https://openairdocs.org/aircraft/N4983Y): [Caprock Soaring Association](https://openairdocs.org/faa-owner/CAPROCK%20SOARING%20ASSOCIATION), [Lubbock, TX](https://openairdocs.org/faa-place/TX/Lubbock), built 1968, S/N 25-4787
- [N62873](https://openairdocs.org/aircraft/N62873): [Sky Sailing Inc](https://openairdocs.org/faa-owner/SKY%20SAILING%20INC), [Warner Springs, CA](https://openairdocs.org/faa-place/CA/Warner%20Springs), built 1978, S/N 25-7856061
- [N82305](https://openairdocs.org/aircraft/N82305): [Akima Logistics Services LLC](https://openairdocs.org/faa-owner/AKIMA%20LOGISTICS%20SERVICES%20LLC), [Usaf Academy, CO](https://openairdocs.org/faa-place/CO/Usaf%20Academy), built 1976, S/N 25-7656070
- [N8784L](https://openairdocs.org/aircraft/N8784L): [Simmons Aviation Services LLC](https://openairdocs.org/faa-owner/SIMMONS%20AVIATION%20SERVICES%20LLC), [Pawcatuck, CT](https://openairdocs.org/faa-place/CT/Pawcatuck), built 1970, S/N 25-5267
- [N8937L](https://openairdocs.org/aircraft/N8937L): [Hood River Soaring](https://openairdocs.org/faa-owner/HOOD%20RIVER%20SOARING), [Hood River, OR](https://openairdocs.org/faa-place/OR/Hood%20River), built 1971, S/N 25-5402
- [N9883P](https://openairdocs.org/aircraft/N9883P): [Minden Soaring Club Inc](https://openairdocs.org/faa-owner/MINDEN%20SOARING%20CLUB%20INC), [Minden, NV](https://openairdocs.org/faa-place/NV/Minden), built 1975, S/N 25-7556211
- [N9897P](https://openairdocs.org/aircraft/N9897P): [Mississippi State University Soaring Club Inc](https://openairdocs.org/faa-owner/MISSISSIPPI%20STATE%20UNIVERSITY%20SOARING%20CLUB%20INC), [Mississippi State, MS](https://openairdocs.org/faa-place/MS/Mississippi%20State), built 1975, S/N 25-7556220

## NTSB investigations (9)

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 CEN14LA261](https://openairdocs.org/ntsb/CEN14LA261), May 28, 2014: Piper PA-25-235 (N8808L), Boulder, CO, substantial damage. Probable cause: The pilot's failure to adequately monitor the airplane's actual fuel consumption rate, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB FTW97LA277](https://openairdocs.org/ntsb/FTW97LA277), Jul 21, 1997: Piper PA-25-235 (N8784L), Blackwell, OK, substantial damage. Probable cause: partial loss of engine power for undetermined reasons. Factors relating to the accident were: the high vegetation and ditch in the emergency landing area.
- [NTSB MIA97LA157](https://openairdocs.org/ntsb/MIA97LA157), May 2, 1997: Thacker Starduster TOO SA300 (N14525), Lake Wales, FL, substantial damage. Probable cause: failure of the tail wheel to lock in the centered detent during the beginning of the takeoff roll, which resulted in the pilot being unable to maintain directional control and the aircraft drifting…
- [NTSB SEA95LA168](https://openairdocs.org/ntsb/SEA95LA168), Jul 31, 1995: Piper PA-25-235 (N8808L), Shelley, ID, substantial damage. Probable cause: THE LEFT MAIN LANDING GEAR TIRE BURST DURING TAKEOFF.
- [NTSB FTW82DA297](https://openairdocs.org/ntsb/FTW82DA297), Jul 26, 1982: Piper PA-25-235 (N8937L), Santa Rosa, NM, substantial damage
- [NTSB SEA78FTI19](https://openairdocs.org/ntsb/SEA78FTI19), May 26, 1978: Piper PA-25 (N9883P), Conrad, MT, substantial damage
- [NTSB MKC77FER46](https://openairdocs.org/ntsb/MKC77FER46), Jun 10, 1977: Piper PA-25 (N8784L), Canby, MN, substantial damage
- [NTSB CHI76FEV56](https://openairdocs.org/ntsb/CHI76FEV56), Jul 25, 1976: Piper PA-25 (N4333Y), Berwick, IL, substantial damage
- [NTSB FTW76FRD41](https://openairdocs.org/ntsb/FTW76FRD41), May 1, 1976: Piper PA-25 (N8784L), Elton, LA, substantial damage

## FAA accident and incident reports (13)

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 20180512005269I](https://openairdocs.org/incident/20180512005269I), May 12, 2018: Piper PA-25-235 (N8937L), Hood River, OR, Minor damage. On may 12, 2018 at approximately 10:45AM, the aircraft was coming in for a landing on a grass runway. The aircraft touched down and during rollout, the…
- [Accident 20140528007499A](https://openairdocs.org/incident/20140528007499A), May 28, 2014: Piper PA-25-235 (N8808L), Boulder, CO, Substantial damage. On may 28, 2014 at 1500 hours mountain standard time (MST), N8808L, sn# 25-5306, a lavia, s.a. (Piper) PA-25-235 aircraft sustained substantial damaged during…
- [Incident 19990430015749I](https://openairdocs.org/incident/19990430015749I), Apr 30, 1999: Piper PA25260 (N4358Y), Ronan, MT, Minor damage. Aircraft landed approximatley 30 feet short of runway. Aircraft is not equipped with VSI. Pilot stated he was not aware of higher than normal sink rate until…
- [Incident 19980616025779I](https://openairdocs.org/incident/19980616025779I), Jun 16, 1998: Piper PA25235 (N8784L), Salida, CO, Minor damage. During landing, and after completing a glider tow operation, the pilot lost control of the aircraft. The aircraft hit and damaged two runway lights and one…
- [Accident 19970721019169A](https://openairdocs.org/incident/19970721019169A), Jul 21, 1997: Piper PA25235 (N8784L), Blackwell, OK, Substantial damage. On July 21, 1997, at 1130 central daylight time, a Piper PA-25-235 argricultural airplane, N8784L, owned and op takeoff climb near Blackwell, Oklahoma. The…
- [Accident 19970502009789A](https://openairdocs.org/incident/19970502009789A), May 2, 1997: Amtr SA300 (N14525), Lake Wales, FL, Substantial damage. Ran a wheel off runway on takeoff. Aborted. Tried return onto runway. Nosed over. Beleive tailwheel failed to lock. (-23) during an aborted 100 foot takeoff…
- [Accident 19950731021149A](https://openairdocs.org/incident/19950731021149A), Jul 31, 1995: Piper PA25235 (N8808L), Shelly, ID, Substantial damage. Blew a tire on takeoff. Lost control. Contacted grain on edge of ag strip. Veered into field. Nosed over.
- [Incident 19860724048109I](https://openairdocs.org/incident/19860724048109I), Jul 24, 1986: Piper PA25235 (N8808L), Webster, ND, Minor damage. During spray operation on pilots farm, nosed over landing on a road. Blamed a locked brake. No brake defects found.
- [Accident 19820725058059A](https://openairdocs.org/incident/19820725058059A), Jul 25, 1982: Piper PA25235 (N8937L), Santa Rosa, NM, Substantial damage. Right main wheel came off axle causing pilot to lose directional control during landing.
- [Accident 19780526012099A](https://openairdocs.org/incident/19780526012099A), May 26, 1978: Piper PA25235 (N9883P), Conrad, MT, Substantial damage. Lee side of a bluff,caught downdraft.
- [Accident 19770610016689A](https://openairdocs.org/incident/19770610016689A), Jun 10, 1977: Piper PA25235 (N8784L), Canby, MN, Substantial damage. Fuel cell bladder torn. Lndd in corn fld.
- [Accident 19760725023619A](https://openairdocs.org/incident/19760725023619A), Jul 25, 1976: Piper PA25235 (N4333Y), Berwick, IL, Substantial damage. Fuel tank vent plugged by foreign matter that resembled green leaves or grass.
- [Accident 19760501010149A](https://openairdocs.org/incident/19760501010149A), May 1, 1976: Piper PA25235 (N8784L), Elton, LA, Substantial damage

## Service difficulty reports (16)

As reported by operators and repair stations, by the model named in the report.

- [SDR 2009FA0000456](https://openairdocs.org/sdr/2009FA0000456), Apr 18, 2009: EXHAUST PIPE. CRACKED. WHILE FLYING PART OF THE EXHAUST PIPE ON THE PILOT SIDE SEPARATED FROM THE PLANE. THE BREAK OCCURRED AT THE WELD JOINT WHERE THE LAST HEADER JOINED THE MAIN PIP
- [SDR 2009FA0000457](https://openairdocs.org/sdr/2009FA0000457), Apr 18, 2009: PRESSURE SWITCH. INTERMITTENT. WHILE PERFORMING VARIOUS TEST FLIGHTS, PERFORMED SLOW FLIGHT AND EXTENDED LANDING GEAR. THE GEAR FAILED TO COMPLETELY EXTEND WITH ONLY THE PILOT SIDE MAIN GEAR 
- [SDR 2006FA0000478](https://openairdocs.org/sdr/2006FA0000478), May 1, 2006: MAGNETO. DISINTEGRATED. MAGNETO WAS REMOVED FROM ENGINE FOR ROUTINE MAINTENANCE INSPECTION. THREADS ON MAGNETO SHAFT AND NUT WERE COMPLETELY STRIPPED. SLOT IN SHAFT FOR WOODRUFF KEY WA
- [SDR 2003FA0000695](https://openairdocs.org/sdr/2003FA0000695), May 31, 2003: BEARING CAGE. DISINTEGRATED. DURING MAINTENANCE ACTION, FOUND LT IMPULSE COUPLING MAG GEAR ROLLER BEARING CAGE, PN LYC 67542 DISINTEGRATED AND DEPOSITED IN OIL SUMP. BOTH SIDES OF ROLLER CA
- [SDR 2003FA0000696](https://openairdocs.org/sdr/2003FA0000696), May 31, 2003: BEARING CAGE. DISINTEGRATED. DURING MAINTENANCE ACTION, FOUND LT IMPULSE COUPLING MAG GEAR ROLLER BEARING CAGE, PN LYC 67452 DISINTEGRATED AND DEPOSITED IN OIL SUMP. BOTH SIDES OF ROLLER CA
- [SDR 2002FA0000079](https://openairdocs.org/sdr/2002FA0000079), Sep 30, 2001: IMPULSE COUPLING. SEPARATED. DURING GROUND RUN, OPERATOR NOTED A LOUD BANG AND SUDDEN OIL LEAKAGE. AFTER SHUT DOWN FOUND THAT LT MAGNETO CAME OFF THE ACCESSORY HOUSING, CAUSING OIL LEAK. BA
- [SDR CA990728042](https://openairdocs.org/sdr/CA990728042), Jul 19, 1999: CRANKCASE. WORN. (CAN) WITH THE MAGS REMOVED, MAG DRIVE IDLER WAS FOUND LOOSE. IT WAS NOTED UPON REMOVAL THAT THE CAST BOSS IN THE AFT END OF THE LEFT CRANKCASE WAS FOUND WORN T
- [SDR AU971472](https://openairdocs.org/sdr/AU971472), Nov 18, 1997: ENGINE. FAILED. (AUS) ENGINE STOPPED. INITIAL INVESTIGATION FOUND THE LH MAGNETO DRIVE GEAR TO BE DAMAGED AND THE SUPPORT BEARING FAILED. ROTATING THE PROPELLER DID NOT CAUSE T
- [SDR 97ZZZX1319](https://openairdocs.org/sdr/97ZZZX1319), Mar 7, 1997: SPRING. BROKE. DURING ASSEMBLY OF THIS ENGINE, 6 SHROUD TUBE SPRINGS WERE INSTALLED, 3 BROKE WHEN THE NUT WAS TIGHTENED. THESE SPRINGS WERE SUPPLIED AS PART OF A PACKET SET FR
- [SDR AU970109](https://openairdocs.org/sdr/AU970109), Jan 29, 1997: DOWEL. SHEARED. (AUS) RH CRANKCASE NO3 DOWEL SHEARED ALLOWING MOVEMENT OF THE MAINBEARINGS - WEAR ALSO TO CRANKCASE TUNNEL AND SCORING OF THE CRANKCASE JOURNAL - DOWEL WAS SUPE
- [SDR AU970110](https://openairdocs.org/sdr/AU970110), Jan 29, 1997: PISTON. CRACKED. (AUS) NO1, NO3 AND NO5 PISTONS CRACKED IN AREA OF SKIRT OPPOSITE TO THE PISTON PIN BOSS - NO1, N3 AND NO5 INDUCTION TUBES FOUND LOOSE ALLOWING UNMETERED AIR INT
- [SDR AU970112](https://openairdocs.org/sdr/AU970112), Jan 29, 1997: NUT. LOOSE. (AUS) THERMOSTATIC OIL COOLER BYPASS VALVE (VERNATHERM) NUT LOOSE
- [SDR AU970114](https://openairdocs.org/sdr/AU970114), Jan 29, 1997: TAPPET. SPALLED. (AUS) CAMSHAFT NO5 LOBE AND ASSOCIATED TAPPET BODIES (2OFF) SEVERELY SPALLED
- [SDR 96ZZZX3888](https://openairdocs.org/sdr/96ZZZX3888), Jul 18, 1996: BEARING. FAILED. AFTER NORMAL TEST CELL RUN, ENGINE OIL WAS DRAINED AND THE OIL FILTER AND SUCTION SCREEN WAS INSPECTED AND A MASSIVE AMOUNT OF ALUMINUM WAS FOUND. UPON DISASSEM
- [SDR 96ZZZX4059](https://openairdocs.org/sdr/96ZZZX4059), Jul 16, 1996: CAM FOLLOWER. BROKEN. CAM FOLLOWERS BROKEN ON NR 1 CYLINDER EXHAUST NR 3, EXHAUST AND INTAKE, NR 5 CYLINDER-INTAKE. REST OF CAM FOLLOWERS PITTED OR SPALLED. NR 2 CYLINDER DROPPED THE
- [SDR AU961102](https://openairdocs.org/sdr/AU961102), Jun 23, 1996: FITTING. CRACKED. (AUS) LH AND RH WING FRONT SPARS CRACKED ON LOWER RADIUS OF FRONT AND REAR WING TO FUSELAGE ATTACHMENT LUGS

## STCs that may be installed (OpenAirDocs) (41)

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 SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists O-540 Series
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com. Lists O-540 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 SE2388CE](https://openairdocs.org/stc/SE2388CE): Installation of B&C Speciality Products lightweight (10.2) pounds) engine starter, part number BC-315-100-1 (12 volts) or part number BC-315-100-3 (24 volts). B & C Specialty Products Inc. Lists O-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 SE4408SW](https://openairdocs.org/stc/SE4408SW): Miscellaneous engine cylinder replacement parts. Continental Motors, Inc. Lists O-540 Series
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists O-540 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-540 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-540 Series
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [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 SE7734SW](https://openairdocs.org/stc/SE7734SW): Modification of engine for operation with ethanol fuel. Shauck Dr Maxwell E Jr
- [STC SE01943CH](https://openairdocs.org/stc/SE01943CH): Add the following approved fuels: unleaded automotive gasoline 87 minimum antiknock index, per ASTM Specification D-439 or D-4814 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227. Experimental Aircraft Association Inc
- [STC SE956GL](https://openairdocs.org/stc/SE956GL): Superseded by STC SE01943CH. Add approved fuel: unleaded automotive gasoline, 87 minimum antiknock index. EAA Aviation Foundation
- [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 SE1433GL](https://openairdocs.org/stc/SE1433GL): Convert Lycoming aircraft engine Model O-540-B2B5 or O-540-B2C5 rated at 235 hp at 2575 rpm to a O-540-B2B5-C-AlD5 or O-540-B2C5-C-A1D5 rated at 250 hp at 2575 rpm maximum. Kron Howard
- [STC SE00890LA](https://openairdocs.org/stc/SE00890LA): Installation of Nickson's cylinder barrels on Lycoming reciprocating engine models. Nickson's Machine Shop Inc. Lists O-540 Series
- [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-540 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-540 Series
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co. Lists O-540 Series
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists O-540 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-540 Series
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists O-540 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-540 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-540 Series
- [STC SE1909CE](https://openairdocs.org/stc/SE1909CE): Operation on unleaded and leaded automotive gasoline. Petersen Aviation Inc
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists O-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 O-540 Series
- [STC SE44WE](https://openairdocs.org/stc/SE44WE): Use of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines. Kling Oil Company. Lists O-540 Series
- [STC SA01436DE](https://openairdocs.org/stc/SA01436DE) (historical): Installation of Firewall Forward Technologies, LLC modified camshaft. Centri-Lube Technologies LLC

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