# Hirth 3701

- Type: Engine model (FAA registry)
- Registry code: 33702
- Manufacturer (registry): HIRTH
- Model: 3701
- Engine type: 2 cycle
- Horsepower: 100
- Installed in: 12 registered aircraft
- Page: https://openairdocs.org/engine/hirth-3701

## ADs that may apply

None matched.

## NTSB investigations (3)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR11LA187](https://openairdocs.org/ntsb/WPR11LA187), Apr 6, 2011: Zenith 701 (N128CF), El Centro, CA, substantial damage. Probable cause: A partial loss of engine power during the initial climb after takeoff due to oil starvation because of the failure of the No. 2 oil pump drive coupling.
- [NTSB ERA09LA502](https://openairdocs.org/ntsb/ERA09LA502), Sep 5, 2009: M-Squared Sprint 1000 (N185SQ), Madeira Beach, FL, substantial damage, 2 fatal. Probable cause: A loss of torque to the gearbox engine-side coupling flange bolts, which resulted in separation of the gearbox and propeller from the engine and the subsequent severing of the airplane's tail…
- [NTSB ANC84LA047](https://openairdocs.org/ntsb/ANC84LA047), Mar 18, 1984: Cessna 170B (N3927V), Fairbanks, AK, substantial damage

## FAA accident and incident reports (3)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20110406010149A](https://openairdocs.org/incident/20110406010149A), Apr 6, 2011: Richards David Stanley III Z701 (N128CF), El Centro, CA, Substantial damage. N128CF zenith 701 lost partial power after takeoff from ipl, pilot made an emergency landing in a muddy wheat field nosed over and came to rest inverted.
- [Accident 20090905017329A](https://openairdocs.org/incident/20090905017329A), Sep 5, 2009: Amtr SPRINT1000 (N185SQ), Maderia Beach, FL, Destroyed, 2 fatal. (-23) Flying over john's pass, Maderia Beach, Florida., at approximately 300 feet, and m-squared spirit 1000 ultra light aircraft (N185QS) lost power crashed…
- [Accident 19840318007349A](https://openairdocs.org/incident/19840318007349A), Mar 18, 1984: Cessna 170B (N3927V), Fairbanks, AK, Substantial damage. A ski broke through the surface while landing on a glacier. Aircraft flipped over.

## Complete lists

- aircraft: 12, https://openairdocs.org/engine/hirth-3701/aircraft
- incidents: 3, https://openairdocs.org/engine/hirth-3701/incidents

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.