# NTSB ANC86LA042: Robinson R-22A, N8455P, Anchorage, AK, April 3, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 3, 1986, 14:00 local (18:00 UTC)
- Place: Anchorage, AK
- Coordinates: 61.269142, -149.789215 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.2691&lon=-149.7892&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4648
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC86LA042
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4648/pdf
- Page: https://openairdocs.org/ntsb/ANC86LA042

## Sequence of events

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

- Loss of control - in flight, hover
  - performance data - not understood, pilot in command (cause)
  - improper use of procedure, pilot in command (contributing factor)
  - procedures/directives - not followed, pilot in command (cause)
  - inattentive, pilot in command (contributing factor)
  - aircraft handling - not maintained, pilot in command (cause)
  - rotor rpm - improper, pilot in command (cause)

## Analysis

THE STUDENT HELICOPTER PILOT STATED THAT THE HELICOPTER NOSED OVER AND ROLLED TO THE RIGHT DURING THE HOVER. THE PILOT ENCOUNTERED A ROLL TO THE RIGHT DUE TO LOW ROTOR RPM.

## Aircraft

- Registration: [N8455P](https://openairdocs.org/deregistered/N8455P-1988-06-16), registration cancelled 1988-06-16, S/N 0376 (OpenAirDocs)
- Reported make and model: ROBINSON R-22A
- Registry model: [Robinson Helicopter R22](https://openairdocs.org/model/robinson-helicopter-r22) (registry code 7640102) (OpenAirDocs)
- Category: Helicopter
- Serial number: 0376
- Airframe hours: 1731
- Engines: LYCOMING O-320-B2C 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: High Tech Helicopter, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 1, 1986, 22 hours before
- Departed: MRI, ANCHORAGE, AK

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: rear; flight hours: 1,030 total, 30 in this make and model, 953 as pilot in command, 32 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 30 °F, dew point 19 °F

## 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 19860403010079A](https://openairdocs.org/incident/19860403010079A), Apr 3, 1986: Robsin R22, Anchorage, AK, Substantial damage. Pilot stated that he could not control a pitch to the right during hover. Pilot was a student helicopter pilot.

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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