Service difficulty report · Autopilot Sys · Boeing 747422

Difficulty date
August 25, 2012
Submitted
September 28, 2012
Operation
Air carrier
Aircraft
N180UA
Make and model
Boeing 747422
Aircraft serial
25224
Aircraft time
89,161 hours, 10,657 cycles
Engine
Pwa PW4056
Part
Autopilot Sys
Condition
Inoperative
Location
Left
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

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

What was found

LEFT AUTOPILOT WILL NOT ENGAGE. COMPLETED REMOVAL OF LEFT CLCP FROM MM AND INSTALLED SERVICEABLE UNIT PER MM. OPS CHECKED NORMAL.