Service difficulty report · Start Valve · Boeing 747422

Difficulty date
February 6, 2011
Submitted
February 11, 2011
Operation
Air carrier
Aircraft
N171UA
Make and model
Boeing 747422
Aircraft serial
24322
Aircraft time
80,508 hours, 9,618 cycles
Engine
Pwa PW4056
Part
Start Valve
Part number
S332T00213
Part serial
320
Condition
Faulty
Location
Nr 2 Engine
Stage of operation
IN
How discovered
O
Nature of condition
J
Precautionary procedure
K

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

What was found

ON PRE-FLT CHK FOUND NR 2 ENG START VALVE STATUS MESSAGE. FAULTED ASCTU FAIL OR BLEED -2 ELECTRICAL FAIL MESSAGE 36312, OK TO DEFER IAW MEL. ALSO FAULTED ENGINE NR2 START VALVE MESSAGE 72085.