# Accident 19910316005439A: Amtr B8M, Brewster, WA, March 16, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: March 16, 1991, 14:05 local time
- Place: Brewster, WA
- Airport: Anderson Field Airport
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 34.4296° N, 86.9291° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=34.4296&lon=-86.9291&mi=10
- Aircraft: N6572K, a cancelled registration (https://openairdocs.org/deregistered/N6572K-2013-10-28) (OpenAirDocs)
- Registry model: Spivey Franklin G B8M (registry code 13021SC, https://openairdocs.org/model/spivey-franklin-g-b8m) (OpenAirDocs)
- Reported make and model: AMTR B8M
- Reported engine: AMTRMC O1001MCCULCH
- People aboard: 1
- Fatal injuries: 1
- Pilot flight hours: 9,300 total
- NTSB investigation: [NTSB ATL91LA066](https://openairdocs.org/ntsb/ATL91LA066) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910316005439A

## Narrative

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

MAIN ROTOR SYSTEM DEPARTED GYROPLANE IN FLIGHT. IMPACT WAS NEAR VERTICAL. BUILDER PILOT FAILED USE RETAINER WASHER.

## 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 ATL91LA066](https://openairdocs.org/ntsb/ATL91LA066), Mar 16, 1991: Benson B8M (N6572K), Hartselle, AL, substantial damage, 1 fatal. Probable cause: THE IMPROPER INSTALLATION OF THE MAIN ROTOR BEARING BLOCK BY THE OWNER/PILOT WHICH RESULTED IN THE SEPARATION OF THE MAIN ROTOR SYSTEM.

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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