On April 27, 1994, a Boeing 737-209 (registration N804AL) operated by Aloha Airlines, Inc. was involved in an aviation accident near Honolulu, HI. Investigators recorded the probable cause as: A multiple system loss had occurred due to the 28-volt DC battery bus going off-line, with the failed part identified as a battery transfer relay (R2). This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
Crew experienced multiple system failures including landing gear indicators, PA/interphone, and thrust reversers. Smoke detected after landing prompted evacuation; one passenger sustained a minor sprain.
Incident Overview
During approach, the flight crew lowered the landing gear but observed that none of the gear position lights illuminated. Prior to landing, the captain also discovered that both the public address system and interphone were inoperative. The approach was visual and the touchdown was normal.
Post-Landing Events
During rollout, the crew found that the thrust reversers would not deploy. After turning off the runway, flight attendants began to smell smoke. The captain stopped the aircraft on a taxiway and initiated an emergency evacuation. One passenger received a minor sprain while using an emergency slide.
Inspection Findings
An inspection revealed that a multiple system loss had occurred because the 28-volt DC battery bus went off-line. Troubleshooting duplicated the condition, and the failed component was identified as a battery transfer relay (R2). The source of the onboard smoke was not identified.
Probable cause
A multiple system loss had occurred due to the 28-volt DC battery bus going off-line, with the failed part identified as a battery transfer relay (R2).
What happened in the 27 Apr 1994 Boeing 737-209 accident near Honolulu, HI?
Crew experienced multiple system failures including landing gear indicators, PA/interphone, and thrust reversers. Smoke detected after landing prompted evacuation; one passenger sustained a minor sprain.
What aircraft was involved and where did it happen?
The accident on 27 Apr 1994 involved a Boeing 737-209, registration N804AL, operated by Aloha Airlines, Inc., at Honolulu, HI.
What was the probable cause of the accident?
A multiple system loss had occurred due to the 28-volt DC battery bus going off-line, with the failed part identified as a battery transfer relay (R2).
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