Service difficulty report · Actuator · Boeing 737890

Difficulty date
July 10, 2023
Submitted
July 12, 2023
Operation
Air carrier
Aircraft
N533AS
Make and model
Boeing 737890
Aircraft serial
35201
Aircraft time
45,468 hours, 13,158 cycles
Part
Actuator
Part number
MA30A1017
Part serial
AA713051
Condition
Failed
Location
#1 Engine
Part time
12,402 hours, 3,531 cycles
Stage of operation
TX
How discovered
V
Nature of condition
J
Precautionary procedure
O

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

What was found

WHEN #1 START LEVER RAISED TO IDLE NO FUEL FLOW SPAR VALVE, ENG VALVE BRIGHT BLUE. GROUNDED - YES. FOUND SPAR VALVE CLOSED LIGHT REMAINS BRIGHT FOUND MAIN MSG 73-31551 FUEL FLOW WAS NOT DETECTED DURING START ATTEMPT VISUALLY CONFIRMED THE MANUAL OVERRIDE HANDLE DID NOT MOVE FROM CLOSED TO OPEN POSITION. REF TAST 73-71 TASK 803, TASK 28-22 TASK 809, TASK 80-06 TASK 802 80081 07/10/23 REPLACED LH ACTUATOR OF THE SPAR VALVE OPS CHECK GOOD REF AMM 28-22-11 SEAMC ARON NOTIFIED 4 MIG 51A INSTALLED AND REMOVED SEE LOG PAGE 60709940 FOR FUEL PUMP REPLACEMENT.