Service difficulty report · Valve · Boeing 777222

Difficulty date
August 2, 2010
Submitted
August 6, 2010
Operation
Air carrier
Aircraft
N224UA
Make and model
Boeing 777222
Aircraft serial
30225
Aircraft time
34,864 hours, 4,278 cycles
Engine
Pwa PW4090
Part
Valve
Part number
339910031
Part serial
1932
Condition
Failed
Location
Bleed Air Sys
Stage of operation
NR
How discovered
9
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

RT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED, OR RT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG-3610532 LATCHED CL MODE MSG-3610532 LATCHED CL MODE MSG-3610340 LATCHED CL MODE MSG-3610340 ACTIVE CL MODE. SUPPLEMENTAL DATA UPDATE FOUND VALVE STICKING AT NEAR FULL OPEN POSITION. REPLACED CONTROLLER FAMV. ALL OPS NORMAL.