# Lycoming O-435-C

- Type: Engine model (FAA registry)
- Registry code: 42070
- Manufacturer (registry): LYCOMING
- Model: O-435-C
- Engine type: Reciprocating
- Power: 175 hp
- Data sheet: [TCDS E-228](https://openairdocs.org/tcds/E-228) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 5 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-o-435-c

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 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 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 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Historical (superseded or no longer in force):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

## Information bulletins (advisory) (2)

- [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

## Registered aircraft (5)

- [N142LB](https://openairdocs.org/aircraft/N142LB): [Fleischer Gregory P](https://openairdocs.org/faa-owner/FLEISCHER%20GREGORY%20P), [Flower Mound, TX](https://openairdocs.org/faa-place/TX/Flower%20Mound), built 1942, S/N 42-98694GF
- [N194](https://openairdocs.org/aircraft/N194): [Skyraider A1e LLC](https://openairdocs.org/faa-owner/SKYRAIDER%20A1E%20LLC), [Rocky Hill, CT](https://openairdocs.org/faa-place/CT/Rocky%20Hill), built 1945, S/N 3567
- [N9416K](https://openairdocs.org/aircraft/N9416K): [Schlener David P](https://openairdocs.org/faa-owner/SCHLENER%20DAVID%20P), [Tyler, TX](https://openairdocs.org/faa-place/TX/Tyler), built 1947, S/N 108-2416
- [N9615H](https://openairdocs.org/aircraft/N9615H): [Harker James P](https://openairdocs.org/faa-owner/HARKER%20JAMES%20P), [Blaine, MN](https://openairdocs.org/faa-place/MN/Blaine), built 1943, S/N 76-716
- [N98629](https://openairdocs.org/aircraft/N98629): [Juhl Marvin T](https://openairdocs.org/faa-owner/JUHL%20MARVIN%20T), [Titusville, FL](https://openairdocs.org/faa-place/FL/Titusville), built 1946, S/N 78-870

## NTSB investigations (2)

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 DEN75DTE20](https://openairdocs.org/ntsb/DEN75DTE20), Aug 29, 1974: Stinson 108 (N9416K), Montrose, CO, substantial damage
- [NTSB DEN73DTE15](https://openairdocs.org/ntsb/DEN73DTE15), Aug 6, 1972: Stinson 108-2 (N9416K), Pueblo, CO, substantial damage

## FAA accident and incident reports (1)

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 19740829030949A](https://openairdocs.org/incident/19740829030949A), Aug 29, 1974: Univar 1082 (N9416K), Montrose, CO, Substantial damage

## Service difficulty reports (2)

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

- [SDR CA140728017](https://openairdocs.org/sdr/CA140728017), Jul 28, 2014: ELT. FAULTY. (CAN) WHILE TESTING THE ELT ON ITS ANNUAL CERTIFICATION AS PER CAR 571 APPENDIX G FOUND G SWITCH IN UNIT WOULD NOT ACTIVATE. UNIT REMOVED FROM SERVICE.
- [SDR CA020510022](https://openairdocs.org/sdr/CA020510022), May 8, 2002: THRUST LINK. CORRODED. (CAN) THE PROPELLER WAS OVERHAULED ON JULY 18, 1996, WAS REMOVED FOR AD 97-18-02 WITH 42.4 HRS. TSO. ON JUNE 29, 1999 THE AD WAS COMPLETED AND THE PROPELLER INS

## STCs that may be installed (OpenAirDocs) (9)

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-435 Series
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company
- [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 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 SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation
- [STC SE2278CE](https://openairdocs.org/stc/SE2278CE): 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

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