Service difficulty report · Hose · Boeing 777222

Difficulty date
June 21, 2009
Submitted
June 24, 2009
Operation
Air carrier
Aircraft
N778UA
Make and model
Boeing 777222
Aircraft serial
26940
Aircraft time
53,092 hours, 9,701 cycles
Engine
Pwa PW4077
Part
Hose
Part number
AS4570G0260SS
Condition
Damaged
Location
Nr 9 Brake Unit
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

FOUND EVIDENCE OF HYD LEAK (HEAVY) ON LEFT MLG WING ROOT AREA. LEAK TRACED TO HYD FLEX HOSE FOR NR 9 BRAKE UNIT DOWNSTREAM OF A-S SHUTTLE VALVE. REPLACED FLEXIBLE HOSE. BLED BRAKES AND PERFORMED LEAK CHECK. NO FURTHER LEAKS OBSERVED. CLEANED LEFT MLG LEG FROM RESIDUAL HYDRAULIC FLUID. HOSE INSTALLED.