Accident · 1990-09-28

NTSB case CHI90FA278 · BOEING 727-251 · Part 121

What the record says

Event date: 1990-09-28
Event type: Accident
Highest injury level: Serious injury
Aircraft: BOEING 727-251 (N278US)
Operating rule: Part 121
Operator: NORTHWEST AIRLINES INC Operator named in NTSB report
Operated by (per NTSB report): NORTHWEST AIRLINES, INC.

Probable cause

THE INTENTIONAL ACTIVATION OF THE AUXILLARY POWER UNIT BY THE FLIGHT ENGINEER, AND THE IMPROPER EVACUATION PROCEDURES BY THE PILOT IN COMMAND. AN ASSOCIATED FACTOR IN THE ACCIDENT WAS THE APU CIRCUIT BREAKERS WERE NOT PULLED BY COMPANY MAINTENANCE PERSONNEL.

Source: NTSB case CHI90FA278

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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