Service difficulty report · Bypass Valve · Boeing 777222

Difficulty date
May 14, 2013
Submitted
May 17, 2013
Operation
Air carrier
Aircraft
N225UA
Make and model
Boeing 777222
Aircraft serial
30554
Aircraft time
47,424 hours, 5,732 cycles
Engine
Pwa PW40903
Part
Bypass Valve
Part number
8102142
Part serial
200109117
Condition
Stuck
Location
Nr 1 A/C Pack
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

STATUS MESSAGE MANIFOLD SENSOR LT, FOUND LT TURBINE BYPASS VALVE STUCK AT .98, MESSAGE 21-23501. REPLACED LT TURBINE BYPASS VALVE IAW MM, OPS CKD GOOD.