Accident · 1998-05-24

NTSB case FTW98FA239 · Bell 206L-3 · Part 91

What the record says

Event date: 1998-05-24
Event type: Accident
Highest injury level: Serious injury
Aircraft: Bell 206L-3 (N27AE)
Operating rule: Part 91
Operator: Air Evac EMS, Inc. Operator named in NTSB report
Operated by (per NTSB report): AIR EVAC EMS, INC. — On-demand air taxi (135) Operator Does Business As: AIR EVAC LIFETEAM

Probable cause

The failure of maintenance personnel to properly assemble the engine's accessory gearbox, which resulted in a total loss of engine power due to partial blockage of the main oil passage by an o-ring. The blockage reduced oil flow to the turbine shafting, which led to the total failure of the gas producer turbine shaft and the power (free) turbine shaft. A factor was the lack of suitable terrain for the forced landing.

Source: NTSB case FTW98FA239

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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