Incident Description
During cruise flight at an altitude of 5,000 feet, the flight crew heard a loud bang and subsequently noted roll and yaw motions. Severe buffeting occurred, and the autopilot disengaged. The number two power lever became jammed at a position corresponding to 68 percent torque, and the airplane exhibited instability about the roll axis. The crew continued the flight and landed without further incident.
Damage Assessment
After landing, maintenance personnel and a Federal Aviation Administration (FAA) inspector examined the aircraft. Two large bird strikes were observed on the right wing. Structural damage included the right wing spar cap, outer spar, ribs, and lower skin aft of the spar. Additionally, damage was noted in the area of the center section control pulleys, and the number two engine throttle control pulley was found broken.
Findings
The inspection confirmed that the bird strikes resulted in substantial structural and control system damage. The jammed power lever and roll instability were consistent with the observed damage to the wing and throttle control pulley. No other contributing factors were identified.