Casualties unknown

MD-82 Ground Power Failure Leads to Cabin Smoke and Evacuation at Gate C-9 (N934AS)

Seattle, WA, US

On April 2, 2000, a Mcdonnell Douglas MD-82 (registration N934AS) operated by Alaska Airlines, Inc. was involved in an aviation accident near Seattle, WA. Investigators recorded the probable cause as: Contaminated air being ducted into the aircraft's cabin from the engine exhaust of a nearby ground power cart. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 6 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards
Aircraft registered N934AS
Aircraft registered N934AS. Photo: Aeroprints.com / CC BY-SA 3.0, via Wikimedia Commons

An MD-82 at gate C-9 experienced a ground power failure at night, causing cabin lights to go out. Smoke from the ground power unit entered the cabin via the external air conditioning source, prompting an evacuation without injuries.

Incident Summary

An MD-82 aircraft was parked at gate C-9 during nighttime operations. The jetway remained attached, and most passengers had already boarded. The aircraft's auxiliary power unit (APU) was inoperative, so electrical power was supplied by an external ground power unit. Cabin air conditioning was provided through an external ground source connected to the aircraft's right engine air conditioning system.

Sequence of Events

During the boarding process, the external electrical ground power unit failed. This failure resulted in the loss of cabin lighting, and the emergency floor track lights automatically illuminated. Simultaneously, smoke and fumes from the exhaust of the electrical ground power cart were drawn into the aircraft's cabin through the external air conditioning source. The presence of smoke was detected by both passengers and crew.

Evacuation

In response to the smoke, the aircraft was evacuated. All occupants exited via the forward left cabin door (L-1) through the attached jetway and into the terminal building. The evacuation was completed without any reported injuries.

Conclusion

The incident highlights the consequences of an external ground power unit failure combined with the ingestion of exhaust fumes into the cabin. No further details were provided regarding the operator, specific location beyond gate C-9, or any causal factors.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X20913. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.