# Lycoming O-235-C1B

- Type: Engine model (FAA registry)
- Registry code: 42028
- Manufacturer (registry): LYCOMING
- Model: O-235-C1B
- Engine type: Reciprocating
- Power: 115 hp
- Data sheet: [TCDS E-223](https://openairdocs.org/tcds/E-223) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 20 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-o-235-c1b

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 98-01-06](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 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 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) (3)

- [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

## Registered aircraft (20)

- [N194JB](https://openairdocs.org/aircraft/N194JB): [Pollard Chad J](https://openairdocs.org/faa-owner/POLLARD%20CHAD%20J), [San Jose, CA](https://openairdocs.org/faa-place/CA/San%20Jose), built 1998, S/N JB2
- [N20VS](https://openairdocs.org/aircraft/N20VS): [Ace Aircraft Co Inc](https://openairdocs.org/faa-owner/ACE%20AIRCRAFT%20CO%20INC), [Toccoa, GA](https://openairdocs.org/faa-place/GA/Toccoa), built 2011, S/N 82128
- [N214NL](https://openairdocs.org/aircraft/N214NL): [Lescher Richard G](https://openairdocs.org/faa-owner/LESCHER%20RICHARD%20G), [Monroe, WA](https://openairdocs.org/faa-place/WA/Monroe), built 2019, S/N WR293S095
- [N215BW](https://openairdocs.org/aircraft/N215BW): [Lumkes John H](https://openairdocs.org/faa-owner/LUMKES%20JOHN%20H), [Lafayette, IN](https://openairdocs.org/faa-place/IN/Lafayette), built 2007, S/N 54
- [N374BW](https://openairdocs.org/aircraft/N374BW): [Wiltse Bruce M](https://openairdocs.org/faa-owner/WILTSE%20BRUCE%20M), [Vacaville, CA](https://openairdocs.org/faa-place/CA/Vacaville), built 2007, S/N 1354
- [N380KP](https://openairdocs.org/aircraft/N380KP): [Peterson Timothy J](https://openairdocs.org/faa-owner/PETERSON%20TIMOTHY%20J), [Watertown, SD](https://openairdocs.org/faa-place/SD/Watertown), built 1947, S/N 11-1586
- [N401CD](https://openairdocs.org/aircraft/N401CD): [Mccartney Terry A](https://openairdocs.org/faa-owner/MCCARTNEY%20TERRY%20A), [Spirit Lake, ID](https://openairdocs.org/faa-place/ID/Spirit%20Lake), built 2006, S/N 1
- [N40940](https://openairdocs.org/aircraft/N40940): [Williams Richard S](https://openairdocs.org/faa-owner/WILLIAMS%20RICHARD%20S), [Longview, TX](https://openairdocs.org/faa-place/TX/Longview), built 2009, S/N TB-001
- [N419GC](https://openairdocs.org/aircraft/N419GC): [Riley Bradlee A](https://openairdocs.org/faa-owner/RILEY%20BRADLEE%20A), [Archdale, NC](https://openairdocs.org/faa-place/NC/Archdale), built 2016, S/N AAZA0167
- [N440JD](https://openairdocs.org/aircraft/N440JD): [Mullenax Larry W](https://openairdocs.org/faa-owner/MULLENAX%20LARRY%20W), [Cuchillo, NM](https://openairdocs.org/faa-place/NM/Cuchillo), built 2020, S/N 75-10806
- [N4542Z](https://openairdocs.org/aircraft/N4542Z): [Waters Caleb M](https://openairdocs.org/faa-owner/WATERS%20CALEB%20M), [Merritt Island, FL](https://openairdocs.org/faa-place/FL/Merritt%20Island), built 1961, S/N 22-8047
- [N53LC](https://openairdocs.org/aircraft/N53LC): [Cramer Todd L](https://openairdocs.org/faa-owner/CRAMER%20TODD%20L), [Fort Mohave, AZ](https://openairdocs.org/faa-place/AZ/Fort%20Mohave), built 2020, S/N 001
- [N5472Z](https://openairdocs.org/aircraft/N5472Z): [Banks Steven R](https://openairdocs.org/faa-owner/BANKS%20STEVEN%20R), [Blue Springs, MO](https://openairdocs.org/faa-place/MO/Blue%20Springs), built 1962, S/N 229252
- [N601VL](https://openairdocs.org/aircraft/N601VL): [Beal Mark E](https://openairdocs.org/faa-owner/BEAL%20MARK%20E), [Northwood, IA](https://openairdocs.org/faa-place/IA/Northwood), built 2009, S/N 6-5093
- [N750FY](https://openairdocs.org/aircraft/N750FY): [Shuck Matthew M](https://openairdocs.org/faa-owner/SHUCK%20MATTHEW%20M), [Merrill, OR](https://openairdocs.org/faa-place/OR/Merrill), built 2012, S/N 75-8309
- [N750XA](https://openairdocs.org/aircraft/N750XA): [Miller Peter D](https://openairdocs.org/faa-owner/MILLER%20PETER%20D), [Vernon, VT](https://openairdocs.org/faa-place/VT/Vernon), built 2017, S/N C75-10614
- [N751MD](https://openairdocs.org/aircraft/N751MD): [Vaughn Billy D](https://openairdocs.org/faa-owner/VAUGHN%20BILLY%20D), [Poteau, OK](https://openairdocs.org/faa-place/OK/Poteau), built 2015, S/N 75-8213
- [N76LN](https://openairdocs.org/aircraft/N76LN): [Hillsboro Aero Academy LLC](https://openairdocs.org/faa-owner/HILLSBORO%20AERO%20ACADEMY%20LLC), [Hillsboro, OR](https://openairdocs.org/faa-place/OR/Hillsboro), S/N 957
- [N87VK](https://openairdocs.org/aircraft/N87VK): [Burgstaller Martine S](https://openairdocs.org/faa-owner/BURGSTALLER%20MARTINE%20S), Deurne, built 1960, S/N 22-8879
- [N993GW](https://openairdocs.org/aircraft/N993GW): [Sol Aviation LLC](https://openairdocs.org/faa-owner/SOL%20AVIATION%20LLC), [Salem, OR](https://openairdocs.org/faa-place/OR/Salem), built 2012, S/N 000219

## NTSB investigations (5)

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 MIA99LA065](https://openairdocs.org/ntsb/MIA99LA065), Jan 6, 1999: Piper PA-22-108 (N4542Z), Perry, GA, substantial damage. Probable cause: The maintenance personnel incorrect adjustment of the intake and exhaust valves resulting in the induction system fire and subsequent loss of engine power.
- [NTSB SEA84FA020](https://openairdocs.org/ntsb/SEA84FA020), Nov 13, 1983: Jodel-Bernier Jodel F-11 (N49842), Inkom, ID, destroyed, 1 fatal
- [NTSB CHI75FEE42](https://openairdocs.org/ntsb/CHI75FEE42), Jan 17, 1975: Piper PA-22 (N5472Z), Schaumburg, IL, substantial damage
- [NTSB CHI72DEV26](https://openairdocs.org/ntsb/CHI72DEV26), Mar 11, 1972: Piper PA-22 (N5472Z), Champaign, IL, substantial damage
- [NTSB CHI66D0520](https://openairdocs.org/ntsb/CHI66D0520), Jan 16, 1966: Piper PA-22 (N5472Z), Lombard, IL, substantial damage

## FAA accident and incident reports (8)

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 20160310001649I](https://openairdocs.org/incident/20160310001649I), Mar 10, 2016: Christavia MK1 (N590MH), Quincy, IL, Minor damage. Aircraft landed and pilot lost control of aircraft. Aircraft departed the runway and sank into the mud. Aircraft subsequently "tipped up" and struck the…
- [Incident 20160123000359I](https://openairdocs.org/incident/20160123000359I), Jan 23, 2016: Christavia MK1 (N590MH), Quincy, IL, Minor damage. On landing the aircraft bounced three times with the left main landing gear collapsing on the third bounce. The aircraft slid to the left side of the runway…
- [Incident 20150430006599I](https://openairdocs.org/incident/20150430006599I), Apr 30, 2015: C W Bingham / Rod H Church ZENITH STOL CH750 (N750FY), Marana, AZ, Minor damage. On April 30, 2015 around 1156 MST, N750FY, an experimental amateur-built zenith stol CH750 aircraft, powered at high RPM, taxied out of control from a self…
- [Incident 20100526005929I](https://openairdocs.org/incident/20100526005929I), May 26, 2010: Dowrick Cha LIGHT SPORT (N401CD), North Las Vegas, NV, Minor damage. Wednesday may 26, 2010 at approximately 10:00 am pilot paul whissel was flying an experimental amatuer built conventional landing gear configured airplane at…
- [Accident 19990106045409A](https://openairdocs.org/incident/19990106045409A), Jan 6, 1999: Piper PA22108 (N4542Z), Middle, GA, No damage. (-23)On climbout aircraft experienced a loss of power, crashed in a sod field. Aircraft encountered a ditch, nose strut broke and subsequently aircraft stopped…
- [Incident 19960503012529I](https://openairdocs.org/incident/19960503012529I), May 3, 1996: Piper PA22108 (N4542Z), Warner Robins, GA, Minor damage. Narrative: pilot rudolph and non-pilot passenger took off at about 1745 EDT for a local area familiarization. Approximately one hour later the engine suddenly…
- [Accident 19831113056839A](https://openairdocs.org/incident/19831113056839A), Nov 13, 1983: Amtrsg JODELF11 (N49842), Inkom, ID, Destroyed, 1 fatal. Engine quit. Misjudged glide to an open field. Struck large boulders on emergeny landing.
- [Accident 19750117001329A](https://openairdocs.org/incident/19750117001329A), Jan 17, 1975: Piper PA22108 (N5472Z), Schaumburg, IL, Substantial damage. Plt rmvd snow and frost fm windshield did not ck upper wing surfaces.

## Service difficulty reports (5)

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

- [SDR CA150526010](https://openairdocs.org/sdr/CA150526010), May 8, 2015: BATTERY. MISMANUFACTURED. (CAN) INSTALLED BATTERY DOES NOT CONFORM TO MANUFACTURER SPECIFIED REQUIREMENTS. ACCORDING TO EMER BEACON CORPORATION, INSTALLATION & OPERATION INSTRUCTIONS FOR
- [SDR 2010FA0000406](https://openairdocs.org/sdr/2010FA0000406), Apr 9, 2010: CYLINDER. CORRODED. LT BRAKE LOCKED UP ON LANDING WHICH RESULTED IN LOSS OF CONTROL AND DAMAGE TO THE ACFT. INSP REVEALED THAT (1) BRAKE PISTON WOULD NOT FULLY RETRACT INTO THE CYL
- [SDR AU000988](https://openairdocs.org/sdr/AU000988), Oct 2, 2000: TORQUE BOX. CRACKED. (AUS) CONTROL COLUMN TORQUE BOX CONTAINED TWO CRACKS ON THE LOWER SURFACE EMANATING FROM THE EDGES OF THE CONTROL COLUMN CUT-OUT. ONE OF THE CRACKS HAD BEEN STO
- [SDR AU970104](https://openairdocs.org/sdr/AU970104), Jan 22, 1997: SEAT BELT. WRONG PART. (AUS) NON-APPROVED HARDWARE AND WEBBING USED IN SEAT BELTS - UNAPPROVED PART - PERSONNEL/MAINTENANCE ERROR
- [SDR 95ZZZX3677](https://openairdocs.org/sdr/95ZZZX3677), May 9, 1995: CARBURETOR. CLOGGED. AIRCRAFT ENGINE EXPERIENCED POWER LOSS. PILOT ATTEMPTED TO REGAIN POWER BY SWITCHING FUEL TANKS, APPLYING CARBURETOR HEAT AND STANDARD EMERGENCY PROCEDURES WERE

## STCs that may be installed (OpenAirDocs) (31)

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-235 Series
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor. LegacySTC.com. Lists O-235 Series
- [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. Lists O-235 Series
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed. Hartzell Engine Technologies, LLC. Lists O-235 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-235 Series
- [STC SE8707SW](https://openairdocs.org/stc/SE8707SW): Alteration of Lycoming O-235 engine to allow use of ethanol fuel. Shauck Dr Maxwell E Jr
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter. Casper Labs Inc
- [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 SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter. Aviation Development Corporation
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA. Lists O-235 Series
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co. Lists O-235 Series
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp. Lists O-235 Series
- [STC SE2035CE](https://openairdocs.org/stc/SE2035CE): Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved. Petersen Aviation Inc
- [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-235 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-235 Series
- [STC SE1976SW](https://openairdocs.org/stc/SE1976SW): Manufacture of new cylinder barrels and rebarreling with original cylinder head. Gary Aerospace Corp. Lists O-235 Series
- [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. Lists O-235 Series
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec. Lists O-235 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-235 Series

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