What happened
While operating in cruise flight at 5,000 feet, the flight crew of the aircraft heard a loud bang followed by significant roll and yaw motions. The airplane experienced severe buffeting, which caused the autopilot to disengage. Upon inspection, the crew found that the number two power lever was jammed at a 68 percent torque position, leaving the airplane unstable about its roll axis. The aircraft subsequently landed uneventfully with no injuries reported.
The investigation
Following the landing, maintenance personnel and an FAA inspector conducted an examination of the aircraft. The inspection revealed evidence of two large bird strikes on the right wing. Structural damage was identified on the right wing spar cap, outer spar, ribs, and the lower skin area aft of the spar. Furthermore, the investigation found damage to the center section control pulleys and determined that the number two engine throttle control pulley had broken.