Service difficulty report · Pump · Boeing 737*

Difficulty date
March 7, 2022
Submitted
March 11, 2022
Operation
Air carrier
Aircraft
N7818L
Make and model
Boeing 737*
Aircraft serial
28609
Aircraft time
65,545 hours, 38,963 cycles
Part
Pump
Part number
82830011
Part serial
YA012857
Condition
Faulty
Location
#1 Engine
Stage of operation
CL
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

#1 ENGINE WILL NOT ACCELERATE TO COMMANDED SETTING; THIS OCCURS DURING TAKE OFF AND CLIMB; THE N1 REMAINS 5% BELOW THE N2 ENGINE REGARDLESS OF THROTTLE POSITION; HAPPENS WITH A/T ON OR OFF; DIFFERENCE GOES AWAY SLOWLY UNTIL THE N1'S ARE MATCHED IN THE HIGH 20S. / [01] COMPLIED WITH FUEL PUMP INSPECTION 73-11-01; FOUND FUEL PUMP IMPELLER SHEERED; R & R FUEL PUMP PER MT 773-11-00.