Accident · 2006-08-18

NTSB case SEA06LA162 · Kaman HH-43F · Part 133

What the record says

Event date: 2006-08-18
Event type: Accident
Highest injury level: Fatal injury
Aircraft: Kaman HH-43F (N559D)
Operating rule: Part 133
Operator: Horizon Helicopters Inc Operator named in NTSB report
Operated by (per NTSB report): Horizon Helicopters

Probable cause

The failure of the left-hand cross-shaft input internal spline while the helicopter was in a hover, which resulted in the loss of gear box timing, in-flight blade contact and separation, and the subsequent loss of control and impact with a log deck.

Source: NTSB case SEA06LA162

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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