Service difficulty report · Switch · Boeing 737990ER

Difficulty date
March 11, 2016
Submitted
March 14, 2016
Operation
Air carrier
Aircraft
N479AS
Make and model
Boeing 737990ER
Aircraft serial
60576
Aircraft time
2,606 hours, 875 cycles
Engine
Cfmint CFM567B27E
Part
Switch
Part number
66002849
Condition
Failed
Location
Start Valve
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
D

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

What was found

NR 1 ENGINE START VALVE FAILED TO CLOSE AFTER ENGINE START. ACFT GROUNDED. ACCOMPLISHED FIM 80-07, TASK 808. R & R NR 1 ENGINE START SWITCH, REF AMM 80-11-00. START SWITCH TEST NORMAL, REF AMM 80-11-00. ACFT GROUND VERIFICATION CHECKS NORMAL.