Service difficulty report · Motor · Boeing 747422

Difficulty date
November 7, 2011
Submitted
November 28, 2011
Operation
Air carrier
Aircraft
N118UA
Make and model
Boeing 747422
Aircraft serial
28811
Aircraft time
51,228 hours, 6,200 cycles
Engine
Pwa PW4056
Part
Motor
Part number
191AC1AR193A
Part serial
9
Condition
Inoperative
Location
Cart Lift
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

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

What was found

CART LIFT INOPERATIVE. CART LIFT SYS INOP. NO TIME TO FIX. DF PER MEL. NOTIFIED OPB. DISCONNECTED CMD DOWN SW & REPLACED DN-HOLDING RELAY Y82K12, NO HELP. LIFT GOES DOWN UNCOMMANDED. REPLACED CART LIFT ACTUATOR MOTOR ASSY. ALSO REPLACED S05 LIMIT SWITCH, ALL OPERATIONS NORMAL NOW.