Service difficulty report · Start Valve · Boeing 737890

Difficulty date
February 24, 2009
Submitted
February 26, 2009
Operation
Air carrier
Aircraft
N557AS
Make and model
Boeing 737890
Aircraft serial
35176
Aircraft time
10,443 hours, 3,054 cycles
Part
Start Valve
Part number
32896302
Part serial
10623
Condition
Frozen
Location
Nr 1 Engine
Part time
6,021 hours, 1,784 cycles
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
D

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

What was found

NO N2 ROTATION ON NR 1 ENG WHEN START SWITCH MOVED TO GROUND. EGT RISE AND DUCT PRESSURE RISE. FOUND NR 1 ENG START VALVE FROZEN. CLOSED MANUALLY EXERCISED START VALVE MOTORED NR 1 ENG, OPS NORMAL REF MM 71 00 00 800 811 FOO.