Service difficulty report · Line · Boeing 747422

Difficulty date
December 12, 2011
Submitted
January 13, 2012
Operation
Air carrier
Aircraft
N104UA
Make and model
Boeing 747422
Aircraft serial
26902
Aircraft time
57,431 hours, 6,734 cycles
Engine
Pwa PW4056
Part
Line
Condition
Leaking
Location
Hyd System
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

GEAR DOES NOT RETRACT, RTFL HYDRAULIC LEAK FROM THE RT OTBD BODY GEAR STEERING ACTUATOR EXTEND LINE. A 1 INCH CRACK IN BEND OF LINE. REPLACED LINE IAW MM. REACTIVATED BODY GEAR ACTUATOR SYSTEMS AS PER PROCEDURES 'A' AND 'B'. CARRIED OUT STEERING ACTUATORS TEST AS PER MM. 164022 TEST PASSES ALL OK AND BODY GEAR ACTUATORS VISUALLY CHECKED TO UNLOCK, MOVE & LOCK AS REQUIRED. LEAK TEST CARRIED OUT WITH NO LEAKS OBSERVED. OK FOR FURTHER SERVICE