# Accident 19811001064619A: Enstrm F28C, Big Lake, AK, October 1, 1981

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: October 1, 1981, 09:40 local time
- Place: Big Lake, AK
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: Rotorcraft external load (Part 133)
- Location: 61.5450° N, 149.8180° W: Placed by OpenAirDocs: center of Big Lake, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=61.5450&lon=-149.8180&mi=10
- Aircraft: N51727, a cancelled registration (https://openairdocs.org/deregistered/N51727-2018-01-09) (OpenAirDocs)
- Registry model: Enstrom F-28C (registry code 3300407, https://openairdocs.org/model/enstrom-f-28c) (OpenAirDocs)
- Registry engine: Lycoming HIO-360 series (registry code 41524, https://openairdocs.org/engine/lycoming-hio-360-series) (OpenAirDocs)
- Reported make and model: ENSTRM F28C
- Reported engine: LYC HIO360E1AD
- Fatal injuries: 0
- Pilot flight hours: 2,049 total, 540 in this make and model, 250 in the last 90 days
- NTSB investigation: [NTSB ANC82DAG01](https://openairdocs.org/ntsb/ANC82DAG01) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19811001064619A

## Narrative

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

ROTOR DRIVE CLUTCH FAILED WHILE LIFTING A SLING LOAD. MADE HARD AUTOROTATION LANDING NEXT TO LOAD. PN CL405267.

## 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 ANC82DAG01](https://openairdocs.org/ntsb/ANC82DAG01), Oct 1, 1981: Enstrom F-28C (N51727), Big Lake, AK, substantial damage

## Other reports on N51727 (2)

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

- [Accident 20120220001709A](https://openairdocs.org/incident/20120220001709A), Feb 20, 2012: Enstrom F-28C (N51727), Kalispell, MT, Substantial damage. On February 20, 2012, about 1030 MST, an Enstrom F-28C helicopter, N51727, was substantially damaged following a loss of power and impact with terrain at the…
- [Accident 19770722020969A](https://openairdocs.org/incident/19770722020969A), Jul 22, 1977: Enstrm F28ENSTR/ (N51727), Medford, OR, Substantial damage. Eng quit drg practice autorotation. Suspected fuel vaporization. Srvc ltr 0062 refers. Steep flare.

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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