# Lycoming VO-435-B1A

- Type: Engine model (FAA registry)
- Registry code: 42201
- Manufacturer (registry): LYCOMING
- Model: VO-435-B1A
- Engine type: Reciprocating
- Power: 265 hp
- Data sheet: [TCDS E-279](https://openairdocs.org/tcds/E-279) (OpenAirDocs)
- Holder: Lycoming Engines
- Installed in: 6 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-vo-435-b1a

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 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 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 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 80-04-04 R1](https://openairdocs.org/ad/80-04-04-R1): Crankshaft Flange Bolts · Lycoming Engines IVO-540-A1A, TIVO-540-A2A, TVO-435-A1A and 38 more. Effective Aug 18, 1980
- [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 68-08-08](https://openairdocs.org/ad/68-08-08): Hydraulic Valve · Lycoming Engines IGSO-480-A1A6, IGSO-480-A1B6, IGSO-480-A1C6 and 44 more. Effective May 19, 1968

Historical (superseded or no longer in force):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 (6)

- [N1449W](https://openairdocs.org/aircraft/N1449W): [Ritel Copter Service Inc](https://openairdocs.org/faa-owner/RITEL%20COPTER%20SERVICE%20INC), [Hudson, IA](https://openairdocs.org/faa-place/IA/Hudson), built 1969, S/N 7931
- [N1503L](https://openairdocs.org/aircraft/N1503L): [Triple F Flying Inc](https://openairdocs.org/faa-owner/TRIPLE%20F%20FLYING%20INC), [Benton, PA](https://openairdocs.org/faa-place/PA/Benton), built 1971, S/N 25042
- [N4097G](https://openairdocs.org/aircraft/N4097G): [Triple F Flying Inc](https://openairdocs.org/faa-owner/TRIPLE%20F%20FLYING%20INC), [Benton, PA](https://openairdocs.org/faa-place/PA/Benton), built 1968, S/N 7907
- [N468HA](https://openairdocs.org/aircraft/N468HA): [Skotz Helicopter Services LLC](https://openairdocs.org/faa-owner/SKOTZ%20HELICOPTER%20SERVICES%20LLC), [Bertram, TX](https://openairdocs.org/faa-place/TX/Bertram), built 1967, S/N 7870
- [N715BH](https://openairdocs.org/aircraft/N715BH): [Wilbur-Ellis Co](https://openairdocs.org/faa-owner/WILBUR-ELLIS%20CO), [Salinas, CA](https://openairdocs.org/faa-place/CA/Salinas), built 1973, S/N 25105
- [N8125J](https://openairdocs.org/aircraft/N8125J): [Green Rick](https://openairdocs.org/faa-owner/GREEN%20RICK), [Hudson, IA](https://openairdocs.org/faa-place/IA/Hudson), built 1970, S/N 25004

## 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 ERA23LA332](https://openairdocs.org/ntsb/ERA23LA332), Aug 12, 2023: Bell 47G-5 (N1503L), Mifflinville, PA, destroyed, 1 fatal. Probable cause: The pilot’s failure to see and avoid powerlines during an aerial application flight.
- [NTSB WPR14CA115](https://openairdocs.org/ntsb/WPR14CA115), Feb 18, 2014: Bell 47G 5A (N715BH), Greenfield, CA, substantial damage. Probable cause: The pilot's failure to maintain clearance from a power pole during low-altitude maneuvering flight.

## FAA accident and incident reports (2)

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 20230812011319A](https://openairdocs.org/incident/20230812011319A), Aug 12, 2023: Bell 47G-5 (N1503L), Mifflinville, PA, Substantial damage, 1 fatal. A Bell 47 helicopter was aerial spraying a corn field located near [privacy data omitted]. When it contacted utility power lines with the left skid. Evidence…
- [Accident 20140218002909A](https://openairdocs.org/incident/20140218002909A), Feb 18, 2014: Bell 47G-5A (N715BH), Greenfield, CA, Substantial damage. Helicopter N715BH struck a power pole with its main rotor blade impacted ground and rolled over.

## Service difficulty reports (12)

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

- [SDR 2013FA0000606](https://openairdocs.org/sdr/2013FA0000606), Sep 25, 2013: GRIP. CRACKED. DURING LOW LEVEL CROP APPLICATION, PILOT HEARD A LOUD POP FOLLOWED BY VIBRATION, LANDED ACFT. NOTICED A CRACK IN THE UNDERSIDE OF THE GRIP DURING A VISUAL INSPE
- [SDR AUS20040185](https://openairdocs.org/sdr/AUS20040185), Mar 14, 2004: CLAMP. CRACKED. (AUS) MAIN ROTOR STABILIZER BAR CLAMP CRACKED.
- [SDR AUS20021416](https://openairdocs.org/sdr/AUS20021416), Dec 10, 2002: VALVE. SEPARATED. (AUS) AIRCRAFT SUFFERED INFLIGHT POWER LOSS. INVESTIGATION FOUND LH FUEL TANK CRASHWORTHY SYSTEM BREAKAWAY FUEL VALVE BEGINNING TOSEPARATE WHICH RESTRICTED FUEL
- [SDR AUS20021053](https://openairdocs.org/sdr/AUS20021053), Sep 18, 2002: CRANKSHAFT. CRACKED. (AUS) CRANKSHAFT CRACKED. CRACK RAN THROUGH THE OIL GALLERY, ACROSS THE THRUST FACE AND THROUGH THE OPPOSITE OIL GALLERY. CRACK EXTENDS THROUGH ALMOST 60% OF TH
- [SDR AU010281](https://openairdocs.org/sdr/AU010281), Mar 22, 2001: GRIP. CRACKED. (AUS) MAIN ROTOR GRIP CRACKED IN SECOND, THIRD AND FOURTH THREADS. FOUND DURING EDDY CURRENT INSPECTION. X-RAY INSPECTION RESULTSWERE INCONCLUSIVE.
- [SDR AU000165](https://openairdocs.org/sdr/AU000165), Mar 28, 2000: LONGERON. CRACKED. (AUS) FUSELAGE LOWER LONGERON CRACKED. FOUND DURING X-RAY INSPECTION IAW AD/BELL47/62 AMDT2.
- [SDR AU981524](https://openairdocs.org/sdr/AU981524), Nov 3, 1998: SHAFT. WORN. (AUS) MAIN TRANSMISSION FAN PULLEY ASSEMBLY GEARSHAFT SPLINES WORN. SEE OPERATOR CONTROL NR AU981525 FOR ADDITIONAL INFORMATION.
- [SDR AU981525](https://openairdocs.org/sdr/AU981525), Nov 3, 1998: DRIVE. STRIPPED. (AUS) MAIN TRANSMISSION FAN PULLEY DRIVE STRIPPED. SUSPECT INCORRECTLY TORQUED AT LAST MAINTENANCE CHECK.
- [SDR 97ZZZX408](https://openairdocs.org/sdr/97ZZZX408), Dec 26, 1996: GEAR. FAILED. DURING SPRAY RUN WHEN CROSSING THE FENCE, THE ENGINE BACKFIRED AND QUIT. THE HELICOPTER TRAVELED APPROX 150 FEET IN THE AIR BEFORE THE SKIDS CONTACTED THE GROUN
- [SDR 96ZZZX3995](https://openairdocs.org/sdr/96ZZZX3995), Jul 2, 1996: LOCKWASHER. FAILED. DURING TROUBLESHOOTING, METAL IN OIL SCREEN PROBLEM, A TANG WAS FOUND IN SUMP SUCTION SCREEN, BUT WAS UNABLE TO POSITIVELY IDENTIFY THE SOURCE OF METAL. TENTATI
- [SDR 96ZZZX5038](https://openairdocs.org/sdr/96ZZZX5038), Jun 18, 1996: DRIVE GEAR. BOLTS SHEARED. GEAR AND SHAFT ASSEMBLY IS A TWO-PART GEAR HELD TOGETHER BY SIX .25 INCH BOLTS AND THREE .25 INCH PILOT PINS. IT APPEARS THE SIX .25 INCH BOLTS WERE NOT PROPERL
- [SDR 96ZZZX2246](https://openairdocs.org/sdr/96ZZZX2246), Mar 1, 1996: GEAR. FAILED. ENGINE ABRUPTLY QUIT RUNNING WHILE ON GROUND. INVESTIGATION REVEALED ASSESSORY DRIVE GEAR, WHICH IS A TWO-PIECE GEAR ASSEMBLED AT THE FACTORY, HAD FAILED. THE 6

## STCs that may be installed (OpenAirDocs) (19)

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 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 VO-435 Series
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company
- [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 VO-435 Series
- [STC SE7504SW](https://openairdocs.org/stc/SE7504SW): Installation of any or all parts listed on Airmotive Engineering Drawing List No. 852-1, Rev. 1, dated 10/4/88, or later FAA approved revision. Continental Motors, Inc. Lists VO-435 Series
- [STC SE7665SW](https://openairdocs.org/stc/SE7665SW): Installation of parts listed on Airmotive List No. 8810-3, Rev 6. Continental Motors, Inc. Lists VO-435 Series
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists VO-435 Series
- [STC SE2902NM](https://openairdocs.org/stc/SE2902NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [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 VO-435 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 VO-435 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 VO-435 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 VO-435 Series
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company. Lists VO-435 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 VO-435 Series
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL. Lists VO-435 Series
- [STC SE2-856](https://openairdocs.org/stc/SE2-856): American Bosch Induction vibrator VJR24B56X. Bell Helicopter Textron. Lists VO-435 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 VO-435 Series

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