B767-300 and 300 ER
Flight Crew Air Transport Pilot (ATP)
Workload; Troubleshooting; Training / Qualification; Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Declared Emergency; General Maintenance Action
Aircraft
About 1 hour after takeoff; received status message 'CA INST TXFER BUS'. Elected to return to the departure airport. Declared emergency due to overweight landing. Landed without incident at approximately 332;500 LBS gross weight. Swapped into different aircraft and flew to the planned destination.
We were unable to contact Dispatch by any means at this time.
An B767-300 CAPT INST TRANSFER BUS status message alerted while in cruise so an emergency was declared and the flight returned to the departure airport.