Service difficulty report · Metering Valve · Boeing 757222

Difficulty date
July 19, 2011
Submitted
August 12, 2011
Operation
Air carrier
Aircraft
N532UA
Make and model
Boeing 757222
Aircraft serial
25072
Aircraft time
69,963 hours, 21,468 cycles
Engine
Pwa PW2037
Part
Metering Valve
Part number
714041
Condition
Leaking
Location
Rt Brake
Stage of operation
NR
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

HYDRAULIC QUANTITY READS RF - RIGHT SYSTEM. CREW COMMENTS: RIGHT 0.55 CENTER 1.02 LEFT 1.22. ACCOMPLISH CHRONIC REVIEW. MAINT TEXT: NEED MINIMUM 2 SHIFTS FOR T-S AND RPR FOR FLUID TRANSFER BETWEEN SYSTEMS. RT BRAKE METERING VLV DOES NOT FULLY CLOSE WHEN MANUALY OPERATED AND WHEN OPENED VLV YOU CAN HEAR VLV BYPASSING, LT DOESN'T AND CK'D ANOTHER ACFT, NO BYPASS. REMOVED VLV PER MM. INSTALLED RT BRAKE METERING VALVE. TAXIED AIRCRAFT FOR APPROX 30 MIN. NO LEAKS NOTED. NO FLUID TRANSFER NOTED, NO HYDRAULIC QTY LOSS NOTED.