Service difficulty report · Pump · Boeing 767338

Difficulty date
December 6, 2005
Submitted
June 6, 2006
Operation
General aviation
Make and model
Boeing 767338
Engine
Ge CF680C2*
Part
Pump
Part number
5006003C
Condition
Faulty
Location
Fuel Boost
Part time
61,686 hours
Stage of operation
IN
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

RT FORWARD BOOST PUMP TRIPPED CIRCUIT BREAKER WHEN PUMP SWITCHED `ON`. INVESTIGATION FOUND THE BOOST PUMP FAILED. WORKSHOP INSPECTION FOUND THAT THE IMPELLER FINS HAD EXCESSIVE WEAR FROM RUBBING IN THE PUMP HOUSING. THE HOUSING ALSO HAD SEVERE EROSION ON THE STRUT AREAS AND EXCESSIVE WEAR IN THE IMPELLER BORE INSIDE DIAMETER. THE PUSH ROD, INSTALLED EXTERNALLY, WAS ALSO FOUND TO BE BENT.