Service difficulty report · Modulating Valve · Boeing 777222

Difficulty date
June 9, 2010
Submitted
June 15, 2010
Operation
Air carrier
Aircraft
N229UA
Make and model
Boeing 777222
Aircraft serial
30557
Aircraft time
34,856 hours, 4,254 cycles
Engine
Pwa PW4090
Part
Modulating Valve
Part number
339910031
Part serial
2
Condition
Faulted
Location
Rt Engine
Stage of operation
NR
How discovered
O
Nature of condition
J
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 R RT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED, OR RT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG-3610320 LATCHED TA MODE MSG-3610340 LATCHED TA MODE NO PARTS SEATTLE SUSPECT CONTROLLER OR MUSCLE AIR FILTERS ON CONTROLLER CLOGGED.