Summary
On February 8, 2015, a Bombardier DHC-8-400 operated by Eurolot SA was preparing for a flight from Rzeszow (EPRZ) to Warsaw. During the initial takeoff roll at approximately 35 knots, the crew received a left AC bus fault warning on the Crew Warning panel. The crew aborted the takeoff and returned to the parking stand.
Details
After returning to the stand, the crew reported the issue to air traffic control and made an entry in the aircraft technical log. The flight was subsequently canceled. The following day, maintenance personnel arrived on the next scheduled flight to perform troubleshooting. They identified a fault in the AC Generator Control Unit (GCU) on the left engine. The GCU was replaced in accordance with the Aircraft Maintenance Manual (AMM) procedure 24-21-06-400-801. Following a successful engine run-up test, the aircraft departed for Warsaw without recurrence of the problem.
Cause
The incident was caused by a fault in the AC Generator Control Unit on the left engine. No preventive measures were taken, and the investigating commission did not issue any safety recommendations.