# Lycoming O-235

- Type: Engine model (FAA registry)
- Registry code: 42717
- Manufacturer (registry): LYCOMING
- Model: O-235
- Engine type: Reciprocating
- Power: 115 hp
- Data sheet: [TCDS E-223](https://openairdocs.org/tcds/E-223) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 14 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-o-235

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 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 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 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998
- [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 95-03-10](https://openairdocs.org/ad/95-03-10): Push Rods · Lycoming Engines O-235, O-235-A, O-235-AP and 38 more. Effective Jan 24, 1996
- [AD 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 1993
- [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 80-25-02 R2](https://openairdocs.org/ad/80-25-02-R2): Pushrods · Lycoming Engines O-235, O-235-A, O-235-AP and 30 more. Effective Jan 13, 1981
- [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980
- [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977
- [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969
- [AD 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

Historical (superseded or no longer in force):

- [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) (4)

- [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-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014
- [SAIB NE-06-32R1](https://openairdocs.org/saib/NE-06-32R1): Reciprocating Engine - Crankshaft. Issued Sep 10, 2008
- [SAIB NE-01-22](https://openairdocs.org/saib/NE-01-22): . Issued May 11, 2001

## Registered aircraft (14)

- [N120RR](https://openairdocs.org/aircraft/N120RR): [Orr Samuel L](https://openairdocs.org/faa-owner/ORR%20SAMUEL%20L), [Cleveland, GA](https://openairdocs.org/faa-place/GA/Cleveland), built 2022, S/N 001
- [N2019L](https://openairdocs.org/aircraft/N2019L): [Reavis William B](https://openairdocs.org/faa-owner/REAVIS%20WILLIAM%20B), [Yadkinville, NC](https://openairdocs.org/faa-place/NC/Yadkinville), built 2024, S/N 75-7610
- [N235FB](https://openairdocs.org/aircraft/N235FB): [Florida Power And Light](https://openairdocs.org/faa-owner/FLORIDA%20POWER%20AND%20LIGHT), [West Palm Beach, FL](https://openairdocs.org/faa-place/FL/West%20Palm%20Beach), built 2021, S/N TRC0001
- [N523EZ](https://openairdocs.org/aircraft/N523EZ): [Jackmond Matthew B](https://openairdocs.org/faa-owner/JACKMOND%20MATTHEW%20B), [Olympia, WA](https://openairdocs.org/faa-place/WA/Olympia), built 1994, S/N 865
- [N52525](https://openairdocs.org/aircraft/N52525): [Mulderink Allen F](https://openairdocs.org/faa-owner/MULDERINK%20ALLEN%20F), [Watertown, WI](https://openairdocs.org/faa-place/WI/Watertown), built 2023, S/N 197
- [N58AT](https://openairdocs.org/aircraft/N58AT): [Turner Michael A](https://openairdocs.org/faa-owner/TURNER%20MICHAEL%20A), [Cartersville, GA](https://openairdocs.org/faa-place/GA/Cartersville), built 1994, S/N 1266
- [N601HH](https://openairdocs.org/aircraft/N601HH): [Herman Joseph D](https://openairdocs.org/faa-owner/HERMAN%20JOSEPH%20D), [Marion, IL](https://openairdocs.org/faa-place/IL/Marion), built 2020, S/N 6-6307
- [N6473E](https://openairdocs.org/aircraft/N6473E): [Callaham Myron](https://openairdocs.org/faa-owner/CALLAHAM%20MYRON), [Bowling Green, KY](https://openairdocs.org/faa-place/KY/Bowling%20Green), built 2021, S/N 098
- [N64MK](https://openairdocs.org/aircraft/N64MK): [Cavanaugh Sean M](https://openairdocs.org/faa-owner/CAVANAUGH%20SEAN%20M), [Ottumwa, IA](https://openairdocs.org/faa-place/IA/Ottumwa), built 1966, S/N 434
- [N749TF](https://openairdocs.org/aircraft/N749TF): [Navmar Applied Sciences Corp](https://openairdocs.org/faa-owner/NAVMAR%20APPLIED%20SCIENCES%20CORP), [Ivyland, PA](https://openairdocs.org/faa-place/PA/Ivyland), built 2024, S/N TRC0004
- [N750XS](https://openairdocs.org/aircraft/N750XS): [Schmalzel Douglass A](https://openairdocs.org/faa-owner/SCHMALZEL%20DOUGLASS%20A), [Allenton, MI](https://openairdocs.org/faa-place/MI/Allenton), built 2021, S/N 75-8584
- [N822DJ](https://openairdocs.org/aircraft/N822DJ): [Coscio David V](https://openairdocs.org/faa-owner/COSCIO%20DAVID%20V), [Kings Beach, CA](https://openairdocs.org/faa-place/CA/Kings%20Beach), built 2025, S/N 77
- [N89RV](https://openairdocs.org/aircraft/N89RV): [Miller James L](https://openairdocs.org/faa-owner/MILLER%20JAMES%20L), [Lynchburg, TN](https://openairdocs.org/faa-place/TN/Lynchburg), built 1989, S/N 11088
- [N950JC](https://openairdocs.org/aircraft/N950JC): [Corbett John P](https://openairdocs.org/faa-owner/CORBETT%20JOHN%20P), [Austell, GA](https://openairdocs.org/faa-place/GA/Austell), built 2023, S/N 1298

## NTSB investigations

None matched to aircraft with this engine model.

## FAA accident and incident reports

None matched to aircraft with this engine model.

## Service difficulty reports (84, newest 50)

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

- [SDR 2J5R2021080300001](https://openairdocs.org/sdr/2J5R2021080300001), Jul 20, 2021: IMPULSE COUPLING. FAULTED. SLICK MAGNETO FAILURE ON LOW-TIME OVERHAULED ENGINE. PILOT REPORTED IT WAS A VERY HOT DAY, NORMAL START, RUN-UP (MAGNETO DROPS UNDER 100 RPM). AFTER TAKE-OFF RO
- [SDR 8HBR20180611014](https://openairdocs.org/sdr/8HBR20180611014), Jun 5, 2018: OIL COOLER. CRACKED. OIL COOLER CRACKED; OIL LOSS. FLIGHT CANCELED
- [SDR 8HBR20180601012](https://openairdocs.org/sdr/8HBR20180601012), May 26, 2018: MAGNETO. INOPERATIVE. LEFT MAGNETO FAILURE ON TAKE-OFF DURING TOUCH & GO'S TRAINING LEADING TO PARTIAL POWER LOSS. TAKE OFF ABORTED AND AIRCRAFT LANDED OFF END OF RUNWAY; BROKE ENGIN
- [SDR 2018FA0000100](https://openairdocs.org/sdr/2018FA0000100), Feb 5, 2018: ROTOR. WORN. WORN ROTOR ULTIMATELY FAILED DURING FLIGHT, RESULTING IN A FATAL ACCIDENT. THE PILOT LIKELY HAD TO APPLY EXCESSIVE FORCE TO SWITCH FUEL TANKS WITH THE WORN ROTO
- [SDR 2017FA0000167](https://openairdocs.org/sdr/2017FA0000167), Mar 29, 2017: CARBURETOR. CLOGGED. DURING TRAINING, FLIGHT, INSTRUCTOR AND STUDENT PILOT NOTICED LOSS OF POWER. THEY DID PRECAUTIONARY LANDING ON I-75 HIGHWAY.
- [SDR CA151224001](https://openairdocs.org/sdr/CA151224001), Dec 21, 2015: ENGINE. FAILED. (CAN) IN THE DEPARTURE PHASE OF A STOP AND GO ON A TRAINING FLIGHT THE PILOT NOTIFIED THE TOWER OF AN ENGINE FAILURE. THE ENGINE WAS RESTARTED AND THE PILOT REQ
- [SDR 2015FA0000588](https://openairdocs.org/sdr/2015FA0000588), Nov 13, 2015: MAGNETO. SEPARATED. MAGNETO DISTRIBUTOR GEAR ELECTRODE FINGER LOOSE ON SHAFT.
- [SDR 2015FA0000451](https://openairdocs.org/sdr/2015FA0000451), Sep 7, 2015: SPINNER. MISSING. DURING CRUISE FLIGHT THE COMPOSITE PROPELLER SPINNER, PN 1054-1 SEPARATED OR BROKE APART AND IMPACTED 1 BLADE OF THE WOODEN PROPELLER, MODEL 6272. THE PROPELLER
- [SDR 2013FA0000209](https://openairdocs.org/sdr/2013FA0000209), Mar 3, 2013: CALIPER. CRACKED. WHILE TAXING OFF RUNWAY, LOST LT BRAKE AND ACFT ENTERED IN THE GRASS AREA. THERE WERE NO MAJOR DAMAGE TO THE ACFT OR INJURIES. DISCOVERED THAT THE LT WHEEL BRAK
- [SDR 2013FA0000124](https://openairdocs.org/sdr/2013FA0000124), Feb 21, 2013: MAGNETO. CONTAMINATED. PILOT REPORTS ROUGH RUNNING RT MAGNETO IN FLIGHT. INSPECTION FINDS MAGNETO HAS OIL INTERNALLY. MAGNETO WAS REMOVED FOR OVERHAUL AND SERVICEABLE MAGNETO INSTALLE
- [SDR BR8C201202250001](https://openairdocs.org/sdr/BR8C201202250001), Feb 25, 2012: TAIL WHEEL. DETACHED. TAIL WHEEL ASSY SEPARATED FROM AIRCRAFT DURING TOUCH & GO'S. ACFT IS USED FOR THE PURPOSE OF TRAINING, VERY HIGH NUMBER OF CYCLES PER HOUR OF FLIGHT TIME. BELIE
- [SDR 2011FA0000114](https://openairdocs.org/sdr/2011FA0000114), Jan 18, 2011: LINE. LEAKING. SMALL AMOUNT OF CORROSION ON UNDERSIDE OF FUEL LINE, RESULTED IN PIN-HOLE LEAK.
- [SDR ZB0R201000007](https://openairdocs.org/sdr/ZB0R201000007), Oct 27, 2010: CASE HALF. CRACKED. DURING ENGINE TEAR DOWN INSP FOR PROPELLER STRIKE, TECH FOUND LT CASE HALF CRACKED IN 2 PLACES AT THE NR2 CYL OPENING. THE DAMAGE CAN BE TOTALLY ATTRIBUTED TO T
- [SDR 2010FA0000153](https://openairdocs.org/sdr/2010FA0000153), Jan 31, 2010: CYLINDER. CRACKED. CYLINDER SN 37316-30 WAS PRESSURE TEST INSPECTED IAW AD 2009-26-12 AND WAS FOUND TO BE CRACKED WHERE CYLINDER HEAD CONNECTS TO CYLINDER BARREL. THE DEFECTIVE CY
- [SDR 2009FA0000772](https://openairdocs.org/sdr/2009FA0000772), Sep 4, 2009: TAPPET. NICKED. TAPPET BODIES RECEIVED FROM MFG WERE FOUND TO BE FULL OF NICKS AND POROSITY. (K)
- [SDR 2009FA0000500](https://openairdocs.org/sdr/2009FA0000500), May 15, 2009: SPAR. CRACKED. ON 5/15/2009, DURING AN ANNUAL INSPECTION IT WAS NOTED THERE IS A COMPRESSION CRACK AT REAR STRUT ATTACH POINT TOP SIDE OF SPAR AT END OF DOUBLER. WHING TIP IMP
- [SDR M2Z2008F00000](https://openairdocs.org/sdr/M2Z2008F00000), Oct 21, 2008: BATTERY PACK. LEAKING. BATTERY PACK LEAKING. PREMATURE DEAD BATTERY. DESTROYED ELT. DEFECTIVE BATTERY AND/OR IMPROPER MFG PROCESS OF BATTERY PACK. (K)
- [SDR 2008FA0000516](https://openairdocs.org/sdr/2008FA0000516), Jul 21, 2008: OIL FILTER. CONTAMINATED. FILTER INSTALLED AND OIL CHANGE RUN-UP NORMAL. FIRST FLIGHT AFTER OIL CHANGE, PILOT NOTICED OIL PRESSURE DROPPING AND HIGH OIL TEMP, UNABLE TO CORRECT, PILOT RE
- [SDR 2008FA0000498](https://openairdocs.org/sdr/2008FA0000498), Jul 11, 2008: BRACKET. CRACKED. WHILE CONDUCTING A 100 HOUR INSPECTION ON THE AIRCRAFT, COMPLYING WITH AD80-11-04 (NUTPLATE INSPECTION). UPON INSPECTION, IT WAS FOUND THAT NOT ONLY WAS THERE A
- [SDR ZB0R20070002](https://openairdocs.org/sdr/ZB0R20070002), Oct 15, 2007: CARBURETOR. LEAKING. DURING PROGRESSIVE INSP, FOUND CARBURETOR BOWL LEAKING AT GASKET. BOLTS WOULD NOT TIGHTEN - STRIPED THREADS. REPLACED CARBURETOR TO CORRECT DISCREPANCY.
- [SDR ZB0R20070005](https://openairdocs.org/sdr/ZB0R20070005), Oct 1, 2007: CYLINDER. LEAKING. DURING PROGRESSIVE INSP, FOUND NR 2 CYLINDER UPPER TOP THROUGH BOLT LEAKING SEVERELY. REMOVED ENGINE FOR REPAIR. REINSTALLED AFTER REPAIR BY SERVICE CENTER. (CA
- [SDR 2007FA0000700](https://openairdocs.org/sdr/2007FA0000700), Jul 11, 2007: FORK. CRACKED. DURING INSPECTION, FOUND NOSE GEAR FORK CRACKED (1.5 INCH LONG) ON LT UPPER RADIUS OF FORK. AIRCRAFT IS USED FOR TRAINING. (K)
- [SDR 2007FA0000463](https://openairdocs.org/sdr/2007FA0000463), May 14, 2007: SPAR. CRACKED. DELAMINATION OCCURRING AT WING STRUT ATTACH LOCATION. CRACK AT BOTTOM EDGE AT ROOT FITTING. POSSIBLE AGE OF SPAR CAUSING DELAMINATION. LONGITUDINAL CRACK AT WIN
- [SDR 2007FA0000417](https://openairdocs.org/sdr/2007FA0000417), May 11, 2007: SPAR. DELAMINATED. DELAMINATION OCCURRING AT LT FRONT WING SPAR / STRUT LOCATION. CRACK AT BOTTOM EDGE, AT WING ROOT FITTING. POSSIBLE AGE OF SPAR CAUSING DELAMINATION. LONGITUDIN
- [SDR 2007FA0000151](https://openairdocs.org/sdr/2007FA0000151), Feb 14, 2007: FASTENER. OUT OF POSITION. RIB NAILS PULLING OUT IN ALMOST EVERY RIB. RT TIP RIB HAS ALL NAILS PULLED OUT AND A SPACE BETWEEN RIBS AND SPARS, BOTH FRONT AND REAR LOCATIONS. LT WING HAS ON
- [SDR 2006FA0001189](https://openairdocs.org/sdr/2006FA0001189), Dec 12, 2006: OIL COOLER. LEAKING. OWNER REPORTED THAT AFTER FLYING AIRCRAFT, THERE APPEARED TO BE OIL LEAKING FROM UNDER COWLING. OIL LEVEL WAS CHECKED AND FOUND TO BE DOWN TO ONLY 3 QUARTS LT. 
- [SDR 2006FA0000756](https://openairdocs.org/sdr/2006FA0000756), Jul 21, 2006: WIRE. SHORTED. WHILE IN FLIGHT, THE PILOT REPORTED HE COULD SMELL SOMETHING BURNING, LANDED AS SOON AS PRACTICAL. INVESTIGATION REVEALED THAT THE WIRE FROM THE ALTERNATOR TO T
- [SDR 2006FA0000674](https://openairdocs.org/sdr/2006FA0000674), Jun 12, 2006: SPRING. BROKEN. FLIGHT INSTRUCTOR WAS DEMO-ING A STALL TO STUDENT. MANUVER STARTED AT 2700 FT. CONTROLS LOCKED UP- AC WENT NOSE DOWN. FLT INST RECOVERED AT 700 FT. (K)
- [SDR 2006FA0000458](https://openairdocs.org/sdr/2006FA0000458), Apr 19, 2006: CABLE. BROKEN. ON FINAL, STUDENT SELECTED 30 DEGREE FLAPS, A LOUD POP WAS HEARD, RT FLAP CAME DOWN TO 30 DEGREES, NO MOVEMENT AT LT FLAP. AIRCRAFT LANDED WITHOUT INCIDENT. INV
- [SDR 2006FA0000373](https://openairdocs.org/sdr/2006FA0000373), Mar 22, 2006: BRACKET. CRACKED. 3 CRACKS WHERE FOUND ON THE TOP RT OB BOLT HOLE AND ONE CRACK IN WELD JUST AFT OF SAME BOLT HOLE, (NUT PLATES HAD BEEN PREVIOUSLY REMOVED). UNKNOWN CAUSE, AD SH
- [SDR 2005FA0001602](https://openairdocs.org/sdr/2005FA0001602), Dec 7, 2005: SKIN. CRACKED. THE SKIN SUPPORTING THE COPILOTS IB SEAT RAIL WAS FOUND CRACKED. THE CRACK WAS APPROX 2.5 INCH LONG AND WAS PERPENDICULAR TO THE SEAT RAIL. THE CRACK WAS LOCATE
- [SDR 2006FA0000012](https://openairdocs.org/sdr/2006FA0000012), Nov 10, 2005: SPAR. CRACKED. ON ROUTING 100 HR INSPECTION FOUND CRACK ON HORIZONTAL STABILIZER FRONT APEK, LOWER ANGLE PN 0432001-37 AND REINFORCEMENT PLATE PN 0432001-44, 1 LOWER SKIN RIVE
- [SDR 2005FA0000184](https://openairdocs.org/sdr/2005FA0000184), Feb 14, 2005: ADAPTER. LEAKING. DOUBLER INSTALLEN IN FUEL TANK HAS NO ACCESS AND MFG CAN NOT TELL US HOW TO STOP FUEL LEAK.
- [SDR 2005FA0001205](https://openairdocs.org/sdr/2005FA0001205), Dec 29, 2004: ATTACH FITTING. CRACKED. A CRACK WAS FOUND IN THE TORQUE KNEE ATTACH LUG (UPPER RADIUS) ON THE RT MAIN LANDING GEAR BRACE ASSEMBLY.
- [SDR 2004FA0000891](https://openairdocs.org/sdr/2004FA0000891), Aug 24, 2004: SLEEVE. FAILED. NICOPRESS SLEEVE (ZINC PLATED COPPER) WAS INSTALLED ON A .0625 INCH STAINLESS CABLE AND PULLED OUT UNDER FLIGHT LOADS. A TEST WAS MADE USING ANOTER SLEEVE AND T
- [SDR 231041](https://openairdocs.org/sdr/231041), Aug 16, 2004: CONTROL PANEL. CORRODED. SMOKE COMING FROM WING ICE CIRCUIT BREAKER PANEL, PULLED BREAKER APPEARED TO STOP SMOKING. MAINTENANCE OPENED PANEL, RT SIDE CORROSION NOTED. CLEANED CORROSION,
- [SDR 2004FA0000542](https://openairdocs.org/sdr/2004FA0000542), Jun 3, 2004: MASTER SWITCH. FAILED. LOWER CONNECTION ON MASTER SWITCH CONTAINS TWO TERMINALS, ONE THAT IS NOT USED. THIS CONTACT THAT IS NOT USED IS THE LOWEST ONE ON THE SWITCH AND CAN COM INTO C
- [SDR 2004FA0000344](https://openairdocs.org/sdr/2004FA0000344), Mar 12, 2004: SPAR. CRACKED. FOUND RUDDER SPAR CRACKED AT LIGHTENING HOLE JUST UNDER TOP RUDDER MOUNTING HINGE. 4 CRACKS WERE PRESENT, THE LONGEST WAS .5 INCH. RECOMMEND INSPECTION EVERY 10
- [SDR 2004FA0000235](https://openairdocs.org/sdr/2004FA0000235), Feb 6, 2004: STRUCTURE. CHAFED. STABILATOR RUBS AGAINST FUSELAGE SCREW. .5 INCH GAP ON LT SIDE, .2500 INCH GAP ON RT SIDE. (GL13200405339)
- [SDR 2004FA0000236](https://openairdocs.org/sdr/2004FA0000236), Feb 6, 2004: FASTENER. CHAFED. DEFLECTION OF LT AILERON UP CAUSES IT TO RUB AGAINST AN EXPOSED RIVET. DEFLECTION OF RT AILERON UP CAUSES IT TO RUB AGAINST TWO EXPOSED RIVETS POSSIBLY HINDERIN
- [SDR 2004FA0000237](https://openairdocs.org/sdr/2004FA0000237), Feb 6, 2004: SPINNER. CHAFED. PROP SPINNER RUBS AGAINST COWL, INCH LONG AND GOING THOUGH FIBERGLASS COWL. (GL13200405339)
- [SDR 2004FA0000238](https://openairdocs.org/sdr/2004FA0000238), Feb 6, 2004: RUDDER. MISINSTALLED. RUDDER CONTACTS FUSELAGE BEFORE REACHING STOPS. (GL13200405339)
- [SDR 2004FA0000239](https://openairdocs.org/sdr/2004FA0000239), Feb 6, 2004: BUNGEE CYLINDER. STIFF. NOSE WHEEL STEERING BUNGEES ARE EXTREMELY STIFF, CAUSES THE RUDDER TO REQUIRE EXTREMELY HIGH RUDDER INPUTS IN FLIGHT. PILOT CAN FEEL A BREAKOVER POINT. (GL13200
- [SDR 2004FA0000240](https://openairdocs.org/sdr/2004FA0000240), Feb 6, 2004: INDICATOR. INACCURATE. NEWLY INSTALLED VORS INDICATORS 6-10 DEGREES DIFFERENCE. NAV 1 G430 W G5, NAV 2 BK W G5 KX 155. (GL13200405339)
- [SDR 2004FA0000241](https://openairdocs.org/sdr/2004FA0000241), Feb 6, 2004: STEP. LOOSE. RT ENTRANCE STEP IS EXTREMELY LOOSE. (GL200305339)
- [SDR 2004FA0000242](https://openairdocs.org/sdr/2004FA0000242), Feb 6, 2004: FUEL TANK. LEAKING. WITH FULL FUEL TANKS AND THE AIRCRAFT ON THE GROUND AN AMOUNT OF FUEL (.5 GALLON +) WILL DRAIN FROM THE VENT OF THE LT FUEL TANK AFTER A FORWARD OR AFT MOVEMENT
- [SDR 2004FA0000243](https://openairdocs.org/sdr/2004FA0000243), Feb 6, 2004: BRACKET. BROKEN. CARB HEAT BRACKET BROKE LOOSE IN FLIGHT.
- [SDR 2004FA0000244](https://openairdocs.org/sdr/2004FA0000244), Feb 6, 2004: AUDIO PANEL. INOPERATIVE. STEREO INPUT INTO AIRCRAFT DOES NOT WORK. (GL13200405339)
- [SDR 2004FA0000245](https://openairdocs.org/sdr/2004FA0000245), Feb 6, 2004: PLACARD. MISSING. DOES NOT INDICATE TAKEOFF POSITION, PLACARD MISSING. (GL13200405339)
- [SDR 2003FA0001207](https://openairdocs.org/sdr/2003FA0001207), Nov 18, 2003: PULLEY. LOOSE. RFD CONTROL TOWER NOTED SPARKS COMING FROM COWLING AREA. UPON COWL REMOVAL NOTED ALTERNATOR AND ALTERNATOR PULLEY HAD BEEN LOOSE AND WOBBLING. ALTERNATOR HOUSIN

All 84: https://openairdocs.org/engine/lycoming-o-235/reports.md

## STCs that may be installed (OpenAirDocs) (30)

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
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd
- [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 SE2393CE](https://openairdocs.org/stc/SE2393CE): 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
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. Hartzell Engine Technologies, LLC
- [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
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE5173NM](https://openairdocs.org/stc/SE5173NM): Installation of a replacement oil cooler adaptor, P/N ADC-310. Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp
- [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
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company
- [STC SE1976SW](https://openairdocs.org/stc/SE1976SW): Manufacture of new cylinder barrels and rebarreling with original cylinder head. Gary Aerospace Corp
- [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
- [STC SE5791SW](https://openairdocs.org/stc/SE5791SW): Installation of any or all engine components parts or modifications on Avco 0-235 series engines. Airmotive Engineering Corp
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL
- [STC SE5CE](https://openairdocs.org/stc/SE5CE): Prestolite ALK-5001 alternator. Larsen Industries

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