Service difficulty report · Pump · Boeing 777222

Difficulty date
April 14, 2012
Submitted
April 18, 2012
Operation
Air carrier
Aircraft
N783UA
Make and model
Boeing 777222
Aircraft serial
26950
Aircraft time
66,856 hours, 9,521 cycles
Engine
Pwa PW40903
Part
Pump
Part number
S271W1114
Part serial
29
Condition
Leaking
Location
Nr 1 Engine
Stage of operation
IN
How discovered
O
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

NR 1 ENGINE HYDRAULIC PUMP CASE DRAIN LEAKING 12 DROPS PER MIN LIMIT IS 6 DPM PER MM. CHANGED PUMP IAW MM 29- 11-05. STILL LEAKING HYD FLUID FROM PUMP CASE DRAIN LINE. WHILE ENG RUNNING LEAK IS AT 50 DROPS PER MINUTE. NOT RUNNING LEAK IS AT 25 DROPS PER MINUTE. MR 29116 DASH 29 REMOVED MR 29116 DASH 27 INSTALLED. REMOVED PUMP MR29116-27 REF AMM. INSTALLED NR 1 ENG DRIVEN HYD PUMP PER NOTED MM. RAN ENG 1 PER JRH, HYD PUMP OPS NORMAL.