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.