# Lycoming R-680-B4

- Type: Engine model (FAA registry)
- Registry code: 42370
- Manufacturer (registry): LYCOMING
- Model: R-680-B4
- Engine type: Reciprocating
- Power: 225 hp
- Data sheet: [TCDS TC 108](https://openairdocs.org/tcds/TC%20108) (OpenAirDocs)
- Holder: Textron Lycoming AVCO Corporation
- Installed in: 2 registered aircraft
- Page: https://openairdocs.org/engine/lycoming-r-680-b4

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 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 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [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

## Registered aircraft (2)

- [N1312N](https://openairdocs.org/aircraft/N1312N): [National Museum Of World War II Aviation](https://openairdocs.org/faa-owner/NATIONAL%20MUSEUM%20OF%20WORLD%20WAR%20II%20AVIATION), [Colorado Springs, CO](https://openairdocs.org/faa-place/CO/Colorado%20Springs), built 1944, S/N 75-5742
- [N6005](https://openairdocs.org/aircraft/N6005): [Bickford Timothy S](https://openairdocs.org/faa-owner/BICKFORD%20TIMOTHY%20S), [Limington, ME](https://openairdocs.org/faa-place/ME/Limington), S/N 534

## 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 OAK72FVG51](https://openairdocs.org/ntsb/OAK72FVG51), Apr 27, 1972: Boeing A75N1 (N68407), Princeton, CA, substantial damage, 1 fatal
- [NTSB OAK67D0077](https://openairdocs.org/ntsb/OAK67D0077), Aug 14, 1966: Boeing A75 (N68407), Dos Palos, CA, destroyed

## FAA accident and incident reports

None matched to aircraft with this engine model.

## STCs that may be installed (OpenAirDocs) (1)

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

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