Service difficulty report · Valve · Boeing 777222

Difficulty date
May 12, 2010
Submitted
May 13, 2010
Operation
Air carrier
Aircraft
N773UA
Make and model
Boeing 777222
Aircraft serial
26929
Aircraft time
60,030 hours, 11,908 cycles
Engine
Pwa PW4077
Part
Valve
Part number
8102142
Part serial
931016
Condition
Seized
Location
Nr 2
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

COND TEMP SENSOR R BOTH RIGHT PACK CONDENSER INLET TEMPERATURE SENSORS FAILED. STATUS MSG01- LATCHED CRUISE MODE DEPENDENT; LOW LIMIT VALVE (R PACK) AC MOTOR IS NOT IN COMMANDED POSITION. DB- CABIN TEMPERATURE CONTROLLER (R CHAN1) MSG02- LATCHED CRUISE MODE DEPENDENT; LOW LIMIT VALVE (R PACK) AC MOTOR IS NOT IN COMMANDED POSITION. MSG-2123402 LATCHED ER MODE MSG-2123402 LATCHED ER MODE. CONDENSER LOW LIMIT VALVE FROZEN. CANNOT LOCK OPEN. PACK INOP. REPLACED LOW LIMIT VALVE PER MM. ADJUSTED AND TESTED PER MM. TEST NOW PASSES. OLD VALVE IS SEIZED.