Service difficulty report · Pump

Difficulty date
November 30, 2017
Submitted
November 30, 2017
Operation
General aviation
Part
Pump
Part number
9304M23P18
Part serial
CGW70204
Condition
Worn
Location
Engine Fuel
Stage of operation
NR
How discovered
9
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

THE MAIN FUEL PUMP CUSTOMER REPORTED AN UNSERVICEABLE IMPELLOR SHAFT WHICH CAUSED AN IN-FLIGHT SHUTDOWN. DISASSEMBLY OF THE PUMP REVEALED THAT THE MAIN DRIVE SHAFT SPLINE WAS EXCESSIVELY WORN AND CONTAINED A DEEP CIRCUMFERENTIAL GROOVE CAUSED BY ROTATIONAL WEAR.