Service difficulty report · Start Valve · Boeing 737890

Difficulty date
July 23, 2009
Submitted
July 27, 2009
Operation
Air carrier
Aircraft
N579AS
Make and model
Boeing 737890
Aircraft serial
35187
Aircraft time
9,336 hours, 2,753 cycles
Part
Start Valve
Part number
32896302
Part serial
10219
Condition
Malfunctioned
Location
Nr 1 Engine
Part time
9,336 hours, 2,753 cycles
Stage of operation
IN
How discovered
O
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

NR 1 ENG START VALVE WILL NOT CUT OUT UNTIL 59 PERCENT OF N2. ATTEMPTED START 3 TIMES WITH SIMILAR RESULTS. CONFIRMED DEFECT REPLACED NR 1 ENGINE START VALVE IAW MM 80 11 00 400 801, OPS CHECKED IAW MM 80 11 00 730 801, ALL GROUND VERIFICATION TESTS PASS.