DC-10 10
Flight Crew Air Transport Pilot (ATP)
Troubleshooting; Workload; Training / Qualification; Confusion
Aircraft Equipment Problem Critical
Flight Crew Took Evasive Action; General Maintenance Action
Aircraft
Upon taxiing in; after landing; Captain elected to shut down #2 engine for less than all engine taxi in. #2 Generator Bus and AC Ground Services Bus went unpowered. I think the Bus Tie relay did not close so we lost all systems/functionality related to the #2 Generator Bus. Continued taxi to the gate and consulted with Maintenance about how to handle the problem before shutting down engines 1 and 3. During the taxi in; we had no taxi light or runway/turnoff lights; possibly no beacon or navigation lights. We kept the strobe lights on for identification and taxied to the line. The airplane had the APU MEL'ed inoperative.
A MD-10's Bus Tie Relay apparently failed after number two engine was shutdown during taxi in so the number Two Generator Bus and AC Ground Service Bus were both lost affecting the taxi light and runway turn off lights.