Service difficulty report · Cylinder · Boeing 747422

Difficulty date
October 18, 2012
Submitted
November 20, 2012
Operation
Air carrier
Aircraft
N197UA
Make and model
Boeing 747422
Aircraft serial
26901
Aircraft time
61,674 hours, 7,258 cycles
Engine
Pwa PW4056
Part
Cylinder
Condition
Leaking
Location
Nlg
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

NOSE GEAR COMPLETELY FLAT UPON ARRIVAL AT GATE WITH EVIDENCE OF FLUID LEAKAGE ON LOWER PART OF STRUT ASSY. FOUND UPPER CAM LOCK HEAD BROKEN OFF, DAMAGE TO UPPER CAM AND STRUT. REPLACED INNER STRUT CYLINDER WITH NEW UNIT FROM BOEING. LEAK CAUSED BY UPPER CAM KEY BEING CAUGHT BETWEEN SEVERAL SURFACES AND OTHER MOVING PARTS. 1 SQ INCH OF CHROME OBLITERATED OFF INNER STRUT CAUSING REPLACEMENT.