Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 195; Flight Crew Type 2447
Situational Awareness; Confusion; Distraction; Troubleshooting; Workload
Aircraft Equipment Problem Critical
Flight Crew Executed Go Around / Missed Approach; Flight Crew Inflight Shutdown; Flight Crew Landed in Emergency Condition
Aircraft
FO was flying approach when at 400 feet AGL left engine thrust increased uncommanded to maximum thrust. Auto throttle was already disconnected when event occurred; engine remained at full power until shutdown; no control possible with power lever despite attempt. FO executed a missed approach; landing was not possible. Tower was informed of missed approach with reason why. Captain made decision at about 2500 feet to shut left engine down immediately; both pilots agreed that speed and altitude would be difficult; if not impossible to control. With power on right engine near idle; coordination was imperative. FO added power to right engine as left engine shut down; expertly handling aircraft; leveling at 3000 feet as instructed by ATC. Departure Control [was advised]. QRH engine shutdown checklist accomplished. Flight Attendants were briefed. No evacuation was planned. Passengers were briefed of situation by Captain. Flight landed with no further incident a short time later.
While on final approach; at approximately 500 feet the left engine accelerated to full power. After realizing the engine was not responding to power lever inputs; we agreed a go-around was the best course of action and initiated one between 200 and 300 feet AGL. During the go around maneuver; we elected to shut down the left engine; run the appropriate checklist; and [advised ATC]; as the aircraft would not perform as desired with one engine operating uncontrolled at full power. After running the appropriate checklist and briefing the flight attendants and passengers; the Captain resumed ATC and PM duties. We re-briefed the approach and landed without incident.
B757 flight crew reported an uncommanded engine acceleration while on final approach. A missed approach was initiated; the engine was shut down; and an uneventful single engine approach was accomplished.