Service difficulty report · Control Valve · Boeing 777222

Difficulty date
May 8, 2010
Submitted
May 10, 2010
Operation
Air carrier
Aircraft
N795UA
Make and model
Boeing 777222
Aircraft serial
26927
Aircraft time
55,342 hours, 8,082 cycles
Engine
Pwa PW4090
Part
Control Valve
Part number
8102044
Part serial
1654
Condition
Failed
Location
Rt A/C Pack
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

PACK FCV R ONE (BUT NOT BOTH) OF THE (2) RT PACK FLOW CONTROL VALVES (FCV) ARE NOT IN THE COMMANDED POSITION. STATUS MSG01- LATCHED CRUISE MODE DEPENDENT; LOWER FLOW CONTROL AND SOV (R PACK) TORQUE MOTOR IS NOT IN COMMANDED POSITION. DB-CABIN TEMP CONTROLLER (R CHAN1) MSG-2124002 LATCHD ER MODE, GRD TEST FAILED. MSG 21-240 02. LOWER FCV TORQUE MOTOR NOT IN COMMANDED POS. DEACTIVATED FCV IN CLOSED POS. DEACTIVATED FCV IN CLOSED POS. REPLACED RT LOWER FCV PER MM, GRND TEST PASSED.