Service difficulty report · Controller · Boeing 777222

Difficulty date
October 8, 2012
Submitted
November 16, 2012
Operation
Air carrier
Aircraft
N211UA
Make and model
Boeing 777222
Aircraft serial
30217
Aircraft time
44,709 hours, 9,704 cycles
Engine
Pwa PW4077
Part
Controller
Part number
339910230
Part serial
29
Condition
Failed
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 PRSOV R RIGHT ENGINE BLEED PRESSURE REGULATING SHUT OFF VALVE (PRSOV) FAILED OPEN OR CLOSED OR RIGHT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE. STATUS MSG-3610380 LATCHD DC MODE MSG-3610380 LATCHD DC MODE. CANNOT UNLATCH MSG. PRSOV LOCKED IN THE CLOSED POSITION. REPLACED RIGHT ENGINE PRSOVC PER AMM. UNLOCK PRSOV PER AMM, SYSTEM TEST PASS. PERFORM ENGINE AIR SUPPLY OPERATION TEST, OPERATION NORMAL DF0411 STICKER REMOVED.