Service difficulty report · Start Valve · Boeing 737990ER

Difficulty date
May 5, 2022
Submitted
May 6, 2022
Operation
Air carrier
Aircraft
N419AS
Make and model
Boeing 737990ER
Aircraft serial
41734
Aircraft time
33,889 hours, 10,801 cycles
Engine
Cfmint CFM567B27E
Part
Start Valve
Part number
32896305
Part serial
1557
Condition
Failed
Location
#1 Engine
Part time
28,223 hours, 8,978 cycles
Stage of operation
TX
How discovered
V
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

NO N1 OR N2 ROTATION DURING THE START SEQUENCE- NUMBER 1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED #1 ENG START VALVE REF B737-900 AMM 80-11-03. PERFORMED PNEUMATIC LEAK CHECK REF AMM 71-00-00, NO LEAKS DETECTED, OPS CHECK GOOD, ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.