Service difficulty report · Control Valve · Boeing 757222

Difficulty date
August 24, 2009
Submitted
August 24, 2009
Operation
Air carrier
Aircraft
N598UA
Make and model
Boeing 757222
Aircraft serial
28751
Aircraft time
42,155 hours, 11,712 cycles
Engine
Pwa PW2037
Part
Control Valve
Part number
3987505
Part serial
285
Condition
Faulty
Location
Rt Ac Pack
Stage of operation
CL
How discovered
O
Nature of condition
O
Precautionary procedure
A

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

What was found

BITE ON RT PACK CONTROLLER SHOWS PACK TEMP CONTROL VALVE, RTFL. REPLACED PACK TEMP CONTROL VALVE. WITH BOTH PACKS RUNNING RT PACK FLOW CONTROL VLV VISUAL INDICATOR SHOWS VLV 3-4 OPEN AND LEFT FCV INDICATOR SHOWS FULL OPEN. REPLACED RT FLOW CONTROL VALVE. REPLACED RIGHT PACK LOW LIMIT VALVE AND LEAK CHECK. OP CHECK NORMAL (P/N 3289696-1 - S/N 85). REPLACED RIGHT PACK ACM.