Event SEA85LA031

1984-12-18 HOQUIAM, Washington, United States Minor 1 aircraft Status: Completed

Registry · N100LM

FAA Aircraft Registry record.

Make / Model

HILLER UH-12E

TCDS

4H11 · SIAM HILLER HOLDINGS INC

Engine

ALLISON 250-C20 SER (420 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19910108

ADS-B equipped

Yes — Mode-S A005BA

Registrant of record

HADDOCK FLYING SERVICE INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N100LM Hiller UH-12ET Minor

Factual narrative

PLT REPORTED THAT WHILE IN NORMAL CRUISE FLIGHT, A TOTAL LOSS OF POWER OCCURRED. AUTOROTATION WAS EFFECTED IN MOUNTAINOUS, WOODED TERRAIN. EXAMINATION OF THE ENGINE SHOWED CONTINUITY AND FREEDOM OF ROTATION. EXAMINATION OF THE FUEL SYSTEM DISCLOSED NO DISCREPANCIS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1984_SEA85LA031.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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