Incident · 1994-11-02

NTSB case CHI95IA028 · BOEING 747-251B · Part 91

What the record says

Event date: 1994-11-02
Event type: Incident
Highest injury level: No injuries
Aircraft: BOEING 747-251B (N631US)
Operating rule: Part 91
Operator: NORTHWEST AIRLINES INC Operator named in NTSB report
Operated by (per NTSB report): NORTHWEST AIRLINES, INC.

Probable cause

inattentive maintenance service of the airplane by the mechanic who failed to disengage the constant speed drive (CSD) after the engine runup had been completed. A factor in this incident was the lead mechanic not performing maintenance record keeping after being informed that the CSD had been recoupled.

Source: NTSB case CHI95IA028

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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