Service difficulty report · Pump · Cessna 750

Difficulty date
November 27, 2007
Submitted
November 29, 2007
Operation
Air carrier
Aircraft
N772P
Make and model
Cessna 750
Aircraft serial
7500272
Aircraft time
440 hours, 240 cycles
Engine
Allsn AE3007C
Engine time
440 hours, 240 cycles
Part
Pump
Part number
99144251
Part serial
MX706809A
Condition
Broken
Location
Lt Engine
Part time
440 hours, 240 cycles
Stage of operation
DE
How discovered
V
Nature of condition
J
Precautionary procedure
A

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

What was found

AT LEVEL AT FL430 JUST PRIOR TO DECENT THE AMBER FUEL BOOST ON-L MESSAGE ILLUMINATED, WHICH WAS FOLLOWED BY AN AMBER FUEL LOW PRESS-L MESSAGE. AFTER LANDING AND WITH ONLY THE APU RUNNING, THE PILOTS WITNESSED A LARGE AMOUNT OF FUEL LEAKING FROM THE LT ENGINE COWING. AFTER SHUTTING DOWN THE APU AND SECURING THE AIRCRAFT, THE LT ENGINE COWLING WAS OPENED. A VISUAL INSPECTION DETERMINED THE LT ENGINE MOTIVE FLOW FUEL PUMP HAD AN INTERNAL FAILURE THAT CAUSED THE HOUSING TO BREAK WITH AN APPROXIMATELY ONE INCH HOLES.

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