Service difficulty report · Controller · Boeing 757222

Difficulty date
November 6, 2012
Submitted
December 20, 2012
Operation
Air carrier
Aircraft
N545UA
Make and model
Boeing 757222
Aircraft serial
25323
Aircraft time
79,029 hours, 22,901 cycles
Engine
Pwa PW2037
Part
Controller
Part number
33990046U2
Part serial
132
Condition
Malfunctioned
Location
Bleed Air Sys
Stage of operation
CR
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

AT CRUISE LEFT DUCT PRESS AT 38 PSI & RIGHT AT 22 PSI. PLACED ON MEL CW MEL DDP LOCKED VALVE CLOSED AND PILOT PLUG DISCONNECTED. REPLACED HIGH STAGE PILOT CONTROLLER PER AMM. REACTIVATED CONTROLLER REF MEL3611C. RUN WITHIN LIMITS.