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SDR ASAA2017033120313

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Service difficulty report · Pump · Boeing 737890

FAA SDR system

Difficulty date
March 31, 2017
Submitted
April 4, 2017
Operation
Air carrier
Aircraft
N583AS
Make and model
Boeing 737890
Aircraft serial
35681
Aircraft time
36,900 hours, 10,868 cycles
System (JASC)
2822 · Fuel Boost Pump
Part
Pump
Part number
609891005
Part serial
030707616
Condition
Failed
Location
Fuel System
Part time
36,898 hours, 10,868 cycles
Stage of operation
CR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

BEING AWARE OF PREVIOUS FUEL IMBALANCE WRITE UP, WE MONITORED FUEL TANK LEVEL. AT 4 HOURS AND 10 MINUTES INTO FLIGHT AT 38,000 FEET NR 2 FUEL TANK WAS 800 LBS. LOWER THAN NR 1 TANK (LEFT SIDE). TO PREVENT A LIMIT FUEL IMBALANCE OF 1,000 LBS. WE CROSSFEED THE TANKS. THERE WAS STILL CENTER (1250 LB) FUEL. SUSPECT NR 2 MAIN TANK PUMPS GREATER PRESSURE THAN CENTER PUMP RIGHT. GROUNDED - YES. REF LOGPAGE 11749408: REMOVED AND REPLACED RIGHT CENTER TANK FUEL BOOST PUMP, REF AMM 28-22-41-000-801 AND TASK 28-22-41-400-801. OPS AND LEAK TEST GOOD.