Service difficulty report · Control Unit · Boeing 737990ER

Difficulty date
June 2, 2024
Submitted
June 4, 2024
Operation
Air carrier
Aircraft
N902DN
Make and model
Boeing 737990ER
Aircraft serial
62780
Aircraft time
18,218 hours, 7,310 cycles
Part
Control Unit
Part number
8221567102
Part serial
174XH4
Condition
Inoperative
Location
Autopilot
Part time
88,640 hours, 29,809 cycles
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

SHIP 3902 -ATB- DUE TO AUTOPILOT UNABLE TO ENGAGE AND ALTITUDE HOLD STUCK AT 7K. CORRECTIVE ACTION: REPLACED AUTOPILOT MODE CONTROL PANEL