Service difficulty report · Warning Message · Boeing 777222

Difficulty date
December 12, 2013
Submitted
December 16, 2013
Operation
Air carrier
Aircraft
N212UA
Make and model
Boeing 777222
Aircraft serial
30218
Aircraft time
49,451 hours, 10,557 cycles
Engine
Pwa PW4077
Part
Warning Message
Condition
False Activation
Location
Cockpit
Stage of operation
NR
How discovered
O
Nature of condition
N
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

APU BLEED AIR STATUS MSG. FOUND MSG 49-11180, APU SURGE CONTROL VLV NOT IN COMMAND POSITION. BLEED VLV IS WORKING THROUGH SCHEMATIC, OPERATING BOTH AIR CONDITION PACK & MOTORING BOTH ENGS AS NORMAL. APU BLEED AIR CONSIDER A NUISANCE MSG & BLEED VLV IS VERIFIED TO OPERATE UNDER ALL CONDITIONS.