Service difficulty report · Controller · Boeing 777222

Difficulty date
November 19, 2009
Submitted
November 20, 2009
Operation
Air carrier
Aircraft
N780UA
Make and model
Boeing 777222
Aircraft serial
26944
Aircraft time
53,834 hours, 9,852 cycles
Engine
Pwa PW4077
Part
Controller
Part number
339910230
Part serial
1900
Condition
Faulty
Location
Bleed Air Sys
Stage of operation
IN
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

NR 2 ENG PRSOV VLV CONTROLLER EXCEEDS UPPER LIMIT DURING HEALTH CHECK. REMOVED AND INSTALLED NEW CONTROLLER. PRSOVC TEST PASSED.