Service difficulty report · Shutoff Valve · Boeing 777222

Difficulty date
April 8, 2010
Submitted
April 9, 2010
Operation
Air carrier
Aircraft
N220UA
Make and model
Boeing 777222
Aircraft serial
30223
Aircraft time
36,829 hours, 4,571 cycles
Engine
Pwa PW4090
Part
Shutoff Valve
Part number
32153024
Part serial
51
Condition
Failed
Location
Rt Bleed Sys
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 PRSOV R RT ENGINE BLEED PRESSURE REGULATING SHUTOFF VALVE (PRSOV) FAILED OPEN OR CLOSED OR RT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG01- LATCHED CLIMB MODE DEPENDENT; PRESS REGULATING AND SOV (RT) FAILED CLOSED. DB- AIR SUPPLY & CABIN PRESSURE CONTROLLER (R) MSG02- ACTIVE CLIMB MODE DEPENDENT; PRESS REGULATING AND SOV (RT) FAILED CLOSED. MSG-3610380 LATCHD CL MODE MSG-3610380 ACTIVE CL MODE REPLACED PRSOV--RAN ENG CKS OK.