Accident · 1993-09-24

NTSB case SEA93LA213 · BELL UH-1B · Part 137

What the record says

Event date: 1993-09-24
Event type: Accident
Highest injury level: Serious injury
Aircraft: BELL UH-1B (N70NW)
Operating rule: Part 137
Operator: NORTHWEST HELICOPTERS, LLC Operator named in NTSB report
Operated by (per NTSB report): NORTHWEST HELICOPTERS, INC

Probable cause

FAILURE OF A SECOND STAGE TURBINE WHEEL TOO LOW FOR A SUCCESSFUL AUTOROTATION. FACTORS INCLUDE A TREE IN THE APPROACH PATH.

Source: NTSB case SEA93LA213

Flight crew

Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.

Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.

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