Service difficulty report · Bushing · Boeing 777FZB

Difficulty date
February 7, 2013
Submitted
February 7, 2013
Operation
Air carrier
Aircraft
N775SA
Make and model
Boeing 777FZB
Aircraft serial
37987
Aircraft time
10,904 hours, 1,325 cycles
Engine
Ge GE90110B1
Part
Bushing
Part number
161W21006
Part serial
MC1784P0852
Condition
Galled
Location
Rt Mlg
Part time
10,904 hours, 1,325 cycles
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

AFTER VISUAL INSPECTION, RT MLG FOUND HAS A GALLED BUSHING ON RETRACTION TRUNNION SLEEVE. FOUND THE AREA OF THE PITTING ON THE SLEEVE. AREA IS WIDTH APPROX 2 CM AROUND THE SLEEVE. PERFORMED IAW RECOMMEND TO REMOVE THE BRONZE TRANSFER WITH SCOTCHBRITE , THE CORROSION ON SLEEVE AND BUSHING WERE NOT FOUND. ASSEMBLED USING A LIGHT COAT OF GREASE AND THEN LUBRICATE THE JOINT WITH MIL-PRF-32014 GREASE; ENSURE THERE IS SQUEEZE OUT AT LEAST SIX LOCATIONS ON THE AFT SIDE AND 2 ON THE FWD SIDE OF THE RETRACT ARM. LUBRICATE THIS IS JOINT EVERY 30-45 DAYS WITH MIL-PRF-32014 GREASE. DISASSEMBLE AND INSPECT THE PITTED AREA AT THE NEXT "C" CHECK AND REPORT FINDING TO MFG FOR FURTHER DISPOSITION.

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