Service difficulty report · Valve · Boeing 777222

Difficulty date
December 15, 2013
Submitted
December 16, 2013
Operation
Air carrier
Aircraft
N799UA
Make and model
Boeing 777222
Aircraft serial
26926
Aircraft time
69,054 hours, 9,763 cycles
Engine
Pwa PW4090
Part
Valve
Part number
329074410
Part serial
921
Condition
Faulty
Location
Bleed Air Sys
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

BLEED FAMV LT ENG BLEED. FAMV FAILED OPEN OR CLOSED OR LT AIR SUPPLY & CABIN PRESS CONTROLLER FAILURE. REPLACED CONTROLLER, NO HELP. PIGGY BACKED NEW FAMV CMC TEST PASSES SUSPECT VLV AT FAULT. IAW SMC 6 BLEED FAMV IS REPLACED, NEEDS ENG RUN. REPLACED LT FAMV IAW MM, OPERATIONS CHECKED OKAY.