Service difficulty report · Control Valve · Boeing 777222

Difficulty date
August 25, 2010
Submitted
August 27, 2010
Operation
Air carrier
Aircraft
N228UA
Make and model
Boeing 777222
Aircraft serial
30556
Aircraft time
35,946 hours, 4,402 cycles
Engine
Pwa PW40903
Part
Control Valve
Part number
8102044
Part serial
174
Condition
Closed
Location
Nr 1 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

RT PACK INOP, RTFL. LOWER FCV WILL NOT OPEN. SWAPPED RT PACK UPPER FCV WITH LOWER FCV, LOCKED UPPER FCV CLOSED AND CHECKED LOWER FCV WORKS NORMAL, LEAK CHECKED OK AND ALL TEST & INDICATION NORMAL. REPLACED UPPER FCV, OPS CHECKED OK.