# Accident 19900827037099A: Bell OH13M74TEXH, Stockton, CA, August 27, 1990

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 27, 1990, 07:10 local time
- Place: Stockton, CA
- Damage: Substantial damage
- Phase of flight: Forced/Precautionary Landing
- Operating rules: Agricultural (Part 137)
- Operator: MBDG
- Location: 37.9596° N, 121.2594° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=37.9596&lon=-121.2594&mi=10
- Aircraft: N43921, registered now (https://openairdocs.org/aircraft/N43921) (OpenAirDocs)
- Registry model: Texas Helicopter OH-13E/M74 (registry code 8930103, https://openairdocs.org/model/texas-helicopter-oh-13e-m74) (OpenAirDocs)
- Registry engine: Lycoming VO-540 series (registry code 41534, https://openairdocs.org/engine/lycoming-vo-540-series) (OpenAirDocs)
- Reported make and model: BELL OH13M74TEXH
- Reported engine: LYC VO435A1F
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 2,500 total, 600 in this make and model, 200 in the last 90 days
- NTSB investigation: [NTSB LAX90DVD03](https://openairdocs.org/ntsb/LAX90DVD03) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19900827037099A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ROUGH ENGINE AND POWER LOSS ON TAKEOFF. DROPPED TO GROUND CAUSING SUBSTANTIAL DAMAGE. MAG TIMING IMPROPERLY SET.

## The NTSB's investigation of this event (1)

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 LAX90DVD03](https://openairdocs.org/ntsb/LAX90DVD03), Aug 27, 1990: Texas Helicopter M47A Wasp (N43921), Stockton, CA, substantial damage. Probable cause: THE PILOT MISJUDGED THE ALTITUDE DURING THE FLARE/TOUCHDOWN PHASE OF THE AUTOROTATION. FACTORS RELATING TO THIS ACCIDENT ARE FAILURE OF THE RIGHT MAGNETO.

## Other reports on N43921 (2)

Matched to the same aircraft by N-number and date.

- [Accident 20120222005279A](https://openairdocs.org/incident/20120222005279A), Feb 22, 2012: Texas Helicopter Corp OH-13E/M74 (N43921), Farmington, CA, Destroyed. A ag air agricultural operator, certificate designator(mbdg) pilot [privacy data omitted] was flying solo spraying a field of wheat and while performing a turn…
- [Accident 19910911039289A](https://openairdocs.org/incident/19910911039289A), Sep 11, 1991: Bell OH13ETEXHELI (N43921), Farmington, CA, Destroyed, 1 fatal. Engine backfired on takeoff. Settled tail first to ground. Pilot hit by main rotor. Helicopter over gross weight.

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. For accidents, the NTSB's own investigation is the fuller record.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.