Service difficulty report · Valve · Boeing 767322

Difficulty date
August 6, 2012
Submitted
August 14, 2012
Operation
Air carrier
Aircraft
N665UA
Make and model
Boeing 767322
Aircraft serial
29237
Aircraft time
50,674 hours, 13,591 cycles
Engine
Pwa PW4056
Part
Valve
Part number
97980612
Part serial
33
Condition
Faulty
Location
Rt A/C Pack
Stage of operation
NR
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

'R PACK INOP' LIGHT ON. EICAS MSG 'R PACK TEMP' DISPLAYED. REPLACED APU SURGE CONTROL VALVE AND AIR SUPPLY SHUTOFF VALVE. APU BLEED PSI NORMAL WITH BOTH PACKS ON AND CTR ADP ON, APU BLEED PSI NORMAL DURING ENGINE DRY MOTOR. APU AIR SUPPLY SHUTOFF VALVE REPLACED, REF DF511, NOW RT PACK OPERATION NORMAL IN AUTO MODE AND R PACK INOP LIGHT NOT ON AND NO STATUS MESSAGES.