# Accident 19910711027089A: Robsin R22ALPHA, El Cerrito, CA, July 11, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 11, 1991, 11:00 local time
- Place: El Cerrito, CA
- Damage: Substantial damage
- Phase of flight: To Vertical (Helicopter Only)
- Operating rules: General operating rules (Part 91)
- Location: 37.9196° N, 122.3025° W: Placed by OpenAirDocs: center of El Cerrito, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9196&lon=-122.3025&mi=10
- Aircraft: N4070H, a cancelled registration (https://openairdocs.org/deregistered/N4070H-2013-10-29) (OpenAirDocs)
- Registry model: Robinson Helicopter R22 BETA (registry code 7640110, https://openairdocs.org/model/robinson-helicopter-r22-beta) (OpenAirDocs)
- Registry engine: Lycoming 0-320 series (registry code 41508, https://openairdocs.org/engine/lycoming-0-320-series) (OpenAirDocs)
- Reported make and model: ROBSIN R22ALPHA
- Reported engine: LYC O320B2C
- Fatal injuries: 0
- Pilot flight hours: 420 total, 316 in this make and model, 205 in the last 90 days
- NTSB investigation: [NTSB LAX91LA307](https://openairdocs.org/ntsb/LAX91LA307) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910711027089A

## Narrative

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

STUDENT MADE SLOPE LANDING. CFI TOOK CONTROL TRIED TO RAISE TO HOVER BUT ROLLED OVER. ONE SKID CAUGHT UNDER A ROCK.

## 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 LAX91LA307](https://openairdocs.org/ntsb/LAX91LA307), Jul 11, 1991: Robinson R22A (N4070H), El Cerrito, CA, substantial damage. Probable cause: THE INSTRUCTOR PILOT'S IMPROPER SLOPE TAKEOFF TECHNIQUE.

## Other reports on N4070H (1)

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

- [Incident 19931001043489I](https://openairdocs.org/incident/19931001043489I), Oct 1, 1993: Robsin R22BETA (N4070H), Lake Mathews, CA, Minor damage. Low rotor RPM during termination of normal approach. Pilot reacted by reducing power instad of incrasing throttle.

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.

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