Service difficulty report · Valve · Boeing 777222

Difficulty date
December 25, 2012
Submitted
January 14, 2013
Operation
Air carrier
Aircraft
N793UA
Make and model
Boeing 777222
Aircraft serial
26946
Aircraft time
67,921 hours, 9,722 cycles
Engine
Pwa PW40903
Part
Valve
Part number
32907449
Part serial
71
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 L LEFT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED OR LEFT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG-3610200 LATCHD CL MODE MSG-3610531 LATCHD DC MODE MSG-3610190 LATCHD DC MODE MSG-3610190 LATCHD DC MODE. OPEN DEFERRED SEE DF329. REPLACED FAMV VALVE PER MM 36-11-16 PG 401 OPS CK'D NORMAL. ACP ENG RUN OPS CK'D NORMAL CLEARED FAULT.