# NTSB LAX91LA407: Robinson R-22, N2302A, Livermore, CA, September 26, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 26, 1991, 14:00 local (21:00 UTC)
- Place: Livermore, CA
- Coordinates: 38.110893, -121.159011 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.1109&lon=-121.1590&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report April 27, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27369
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX91LA407
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27369/pdf
- Page: https://openairdocs.org/ntsb/LAX91LA407

## Probable cause

1) INCORRECT CONTROL INPUT BY THE STUDENT PILOT AND 2) THE FLIGHT INSTRUCTOR'S INADEQUATE SUPERVISION OF HIS STUDENT. A CONTRIBUTING FACTOR IN THIS ACCIDENT WAS THE UNFAVORABLE WIND CONDITIONS.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Roll over, landing - flare/touchdown
  - weather condition - unfavorable wind (contributing factor)
  - rotorcraft flight controls - improper use of, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)

## Analysis

IN HIS WRITTEN STATEMENT, THE INSTRUCTOR PILOT STATED THAT HE AND HIS STUDENT WERE PRACTICING SLOPE LANDINGS.  HE SAID THAT THE LEFT SKID WAS AGAINST THE SLOPE AND A GUST OF WIND SHIFTED THE HELICOPTER.  HE SAID THAT THE STUDENT PILOT DID NOT APPLY THE CORRECT FLIGHT CONTROL INPUT AND THE HELICOPTER ROLLED OVER.

## Aircraft

- Registration: [N2302A](https://openairdocs.org/aircraft/N2302A), registered now, S/N 1903, built 1991 (OpenAirDocs)
- Reported make and model: ROBINSON R-22
- Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1903
- Airframe hours: 128
- Engines: LYCOMING O-320-B2C 124 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Nice Air
- Registered owner: Gary Mccoy
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, September 6, 1991, 29 hours before
- Departed: RHV, SAN JOSE, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial, flight instructor; medical: class 2, unknown; seat: left; flight hours: 411 total, 411 in this make and model, 360 as pilot in command, 160 in the last 90 days, 70 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 0° at 9 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 68 °F
- Altimeter: 30.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19910926043709A](https://openairdocs.org/incident/19910926043709A), Sep 26, 1991: Robsin R22BETA, Livermore, CA, Substantial damage. Rolled over on practice slope landing. Student misused collective.

## Other investigations on N2302A (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 MIA07CA021](https://openairdocs.org/ntsb/MIA07CA021), Nov 21, 2006: Robinson R22 (N2302A), Lakeland, FL, substantial damage. Probable cause: The flight instructor's failure to maintain control of the helicopter during takeoff resulting in a roll over.

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.

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