What happened
On March 28, 2014, a Bombardier Challenger CL-300 was performing a takeoff roll at Moscow Vnukovo (UUWW). During the acceleration phase, when the aircraft reached a speed of approximately 60 knots, the crew observed a "TAKE OFF CONFIGURATION" alert on the Crew Alerting System (CAS).
In response to this warning, the crew aborted the takeoff. After taxiing, the crew identified a STAB TRIM FAULT indication. The crew performed a power cycle by switching the electrical power off and then back on, after which the fault indication did not reappear. The crew subsequently proceeded with a second takeoff attempt, which was completed without further incident.
The investigation
The investigation focused on the origin of the cockpit warning and the subsequent mechanical indications. The investigation established that the aircraft's systems initially reported a stabilizer trim malfunction during the high-speed portion of the takeoff roll.
Findings
- The primary cause of the "STAB TRIM FAULT" indication was determined to be a false signal generated within the aircraft's computer system.
Safety action
- The operator's flight crews were briefed on the circumstances of the event during their annual aviation safety training.