Incident · 1998-03-11

NTSB case ANC98IA026 · Boeing 737-205 · Part 91

What the record says

Event date: 1998-03-11
Event type: Incident
Highest injury level: No injuries
Aircraft: Boeing 737-205 (N733AR)
Operating rule: Part 91
Operator: ARCO ALASKA, INC. Operator named in NTSB report
Operated by (per NTSB report): ARCO ALASKA, INC.

Probable cause

The dynamic imbalance in the yaw rate gyro, which provided input to the yaw damper and rudder. A factor was the deteriorated grease in the gyro bearings.

Source: NTSB case ANC98IA026

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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