B757 flight crew reported a stuck Auto Throttle Servo on climb out and could not retard the left throttle. After communication with Maintenance and Dispatch; the flight crew diverted for landing.
Synopsis
B757 flight crew reported a stuck Auto Throttle Servo on climb out and could not retard the left throttle. After communication with Maintenance and Dispatch; the flight crew diverted for landing.
Narrative
After auto throttle engagement on take-off roll; there was a small pause at 12 O' Clock position of the left throttle on engine spool up; the thrust continued to calculated take-off thrust. Pilot Flying (PF) who was Captain (CA) elected to continue due to knowledge of previous write-up. Passing approximately 10;000 ft; on Auto Throttle reduction; L ENG Throttle abruptly stopped moving at 12:30-1:00 position; approximately 85% N1. PF clicked off Auto Throttles. This did not help. PF could not physically retard the L ENG throttle passed the 12:30-1:00 position. While leveling at 12000 ft; PF reduced R ENG Throttle to almost idle to maintain 300 kts. CA elected to continue climb due to high power setting and weather in the ZZZ area. PM recommended that PF shut off Auto Throttle Arm Switch. This did not help. PF (CA) passed controls to First Officer (FO) at 22;000 ft. CA told ATC that we would like FL240 as a final due to Stuck/Jammed Throttle. CA searched for Stuck/Jammed throttle in QRH. No checklist relating to this condition was found. CA hit 'Call Me' on ACARS. Dispatch came back with ZZZ Radio. Transmission from Dispatch and Maintenance was weak and barely readable. CA confirmed over ACARS that Dispatch was in agreement with a plan to shut down L ENG and proceed to nearest suitable alternate (now ZZZ1). CA shut down engine and complied with Engine Failure/Shutdown checklist. ZZZ1 was landing XXR. CA discussed with ATC the possibility of XYL landing due to tailwind (ATIS wind was 120/11). ATC said wind at field was 120/7. CA accepted XXR due to length of runway; despite tailwind. CA took controls from FO at approximately 6000 ft. and flew the ILS XXR approach. Upon landing; Auto Brakes disarmed and Auto Speed Brakes did not deploy! This was due to the L throttle being physically stuck at the 12:30-1:00 o'clock position. Both throttles need to be at idle for the auto brakes and auto speed brakes to deploy. CA noticed high rate of speed and the Auto Brakes Disarm Light On. CA smoothly applied manual braking and stopped the aircraft with plenty of distance remaining. CA exited the runway with a right turn at R as directed by Tower. CA noticed a Brake Temp Light approximately 5 minutes later. (L brake got one '5' and one '6'). OPS was notified of the hot brake condition.
Second reporter narrative
[Report narrative contained no additional information.]
More incidents for this aircraft family →
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.