What happened
Following takeoff from Seattle-Tacoma International Airport, the flight crew identified a reduction in power from the right engine. In response to this malfunction, the crew initiated an emergency return to the airport for a landing. During the approach, after the landing gear had been deployed, a significant fire was observed within the right engine nacelle.
Upon touchdown on runway 1sL, the aircraft experienced a total failure of braking capabilities and directional control. This loss of control occurred after the left power lever was transitioned to flight idle. The crew notified air traffic control that the aircraft was no longer controllable. The aircraft subsequently veered off the left side of the runway, traversing the ramp area where it collided with ground equipment, a runway designator sign, and jetway structures B7 and B9. The intense fire following the collision ultimately destroyed the aircraft.
Findings
Investigations determined that an improper installation of the high-pressure fuel filter cover occurred during an engine overhaul. This error went undetected when the engine was mounted to the aircraft, resulting in a substantial fuel leak that ignited within the nacelle. The resulting fire and explosion caused the loss of the right engine center access panels. This damage compromised the effectiveness of the onboard fire suppression system and led to the burning through of hydraulic lines, which directly caused the total loss of control during the ground excursion. The incident resulted in 0 fatalities and 0 injuries.