SDR AALA202210244903

Service difficulty report · Computer · Boeing 737823

Difficulty date: October 22, 2022
Submitted: October 25, 2022
Operation: Air carrier
Aircraft: N965NN
Make and model: Boeing 737823
Aircraft serial: 33239
Aircraft time: 22,565 hours, 9,055 cycles
System (JASC): 2230 · Auto Throttle System
Part: Computer
Condition: Faulted
Location: Autothrottles
Stage of operation: TO
How discovered: O
Nature of condition: J
Precautionary procedure: C

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AIRCRAFT WAS GROUNDED: ON TAKEOFF THROTTLES SPLIT AFTER TOGA WAS SELECTED. LEFT THROTTLE FROZE, RIGHT THROTTLE ADVANCED. AUTO THROTTLES KICKED OFF. REJECTED TAKEOFF AND RETURNED TO GATE. FOUND STALL MANAGEMENT YAW DAMPER (SYMD) FAULT. RESET AUTOMATIC FLIGHT CONTROL SYSTEM PER FIM TASK 22-31-00. ACCOMPLISHED SATISFACTORY SYMD-1 AND SMYD-2 SYSTEM TEST PER FIM TASK 22-31-00. ACCOMPLISHED SATISFACTORY INTERACTIVE SERVO METER TEST, TORQUE TEST, INPUT DISCRETE TEST, AND ANNUNCIATION TEST.