Service difficulty report · Actuator · Boeing 737890

Difficulty date
August 17, 2010
Submitted
August 23, 2010
Operation
Air carrier
Aircraft
N590AS
Make and model
Boeing 737890
Aircraft serial
35687
Aircraft time
9,712 hours, 3,042 cycles
Part
Actuator
Part number
MA20A2027
Part serial
AA902393
Condition
Malfunctioned
Location
Rt Wing Tank
Part time
9,734 hours, 3,051 cycles
Stage of operation
CL
How discovered
O
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

RIGHT SPAR VALVE CLOSED LIGHT ILLUMINATED BRIGHT NEAR TOP OF CLIMB NO MASTER CAUTION. ALL ENGINE AND FUEL INDICATION NORMAL. LIGHT WENT OUT WHEN FUEL FLOW INCREASED DURING STEP CLIMB. PERFORMED ENGINE FUEL SPAR VALVE ELECTRICAL CONTROL AND INDICATION TEST NO FAULT FOUND. VERIFICATION FLIGHT SUCCESSFUL. TSR FOLLOW-UP: REPLACED RT SPAR VALVE ACTUATOR RESISTANCE CHECKS GOOD REF: MM 28 22 11. PERFORMED ENGINE FUEL SPAR VALVE ELECTRICAL CONTROL AND INDICATION TEST GOOD.