Service difficulty report · Actuator · Boeing 737890

Difficulty date
April 8, 2014
Submitted
April 10, 2014
Operation
Air carrier
Aircraft
N592AS
Make and model
Boeing 737890
Aircraft serial
35190
Aircraft time
24,008 hours, 7,466 cycles
Part
Actuator
Part number
MA30A1001
Part serial
AA248683C
Condition
Failed
Location
Nr 2 Eng Fuel
Part time
10,277 hours, 3,009 cycles
Stage of operation
TX
How discovered
O
Nature of condition
Y, J
Precautionary procedure
D

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

What was found

NORMAL START ON BOTH ENGINES. LOOKED BACK AT ENGINE INSTRUMENTS AND NR 2 ENGINE SHUTDOWN. ATTEMPTED RESTART, RECEIVED NORMAL START INITIALLY, WITH FUEL FLOW INDICATION, BUT THEN FUEL FLOW DROPPED. DISCOVERED THAT BLUE ENGINE VALVE CLOSED LIGHT WAS ILLUMINATED AND WHITE BOX AROUND EGT WAS FLASHING. ACFT GROUNDED. FOUND NR 2 ENG FUEL SPAR VALVE STUCK IN CLOSED POSITION. R & R NR 2 ENG FUEL SPAR VALVE ACTUATOR IAW AMM TASK 28-22-11-000-804, AND TASK 28-22-11-400-804. GROUND VERIFICATION OF NR 2 ENG SPAR VALVE ACTUATOR GOOD. RAN BOTH ENGINES. OPS NORMAL.