Service difficulty report · Switch · Boeing 747422

Difficulty date
May 2, 2012
Submitted
June 5, 2012
Operation
Air carrier
Aircraft
N128UA
Make and model
Boeing 747422
Aircraft serial
30023
Aircraft time
48,699 hours, 5,754 cycles
Engine
Pwa PW4056
Part
Switch
Condition
Faulted
Location
Steering Act
Stage of operation
LD
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

EICAS FOR BODY GEAR STEERING INDICATION SYSTEM IS INOPERATIVE. TESTED ELECTRICAL CONTROL UNIT & SYSTEM INDICATION, OPERATION, AND AUTOMATIC ARMING BY USING INPUT MONITORING. LT BODY GEAR STRNG LT LOCKED PER MM. FOUND LEFT BODY GEAR LEFT ACTUATOR PRIORITY SWITCH INOPERATIVE PER MM. REPLACED LT BODY GEAR STEERING LT ACTUATOR PRIORITY LOCK SWITCH. REPLACED AND BITE TEST CARRIED OUT SATISIFACTORY PER MM. NO MESSAGE DISPLAYED.