SDR 98ZZZX225

Service difficulty report · Gasket

Difficulty date
December 11, 1997
Submitted
March 26, 2000
Operation
General aviation
Engine
Lyc TIO540J2BD
Part
Gasket
Part number
RA8987
Condition
Leaks
Location
Fuel Pump
Stage of operation
IN
Nature of condition
K
Precautionary procedure
K

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

What was found

FUEL PUMP OVERHAULED AND BENCH TESTED 2-97 PER RG9080 COMPONENT MM, BUT WAS NOT PLACED INTO SERVICE UNTIL 12/97. PUMP LEAKED AT RA8987 GASKET ON INITIAL START-UP OF ENGINE IN TEST CELL. ALL SCREWS FOUND BELOW MINIMUM 23 INCH/POUND TORQUE REQUIRED BY SB 1015B020. RA8987 GASKET WAS ASBESTOS, BUT IS NOW RUBBER COMBINED WITH DOUBLE RUBBER RELIEF DIAPHRAGMS RA5326. THERE APPEARS TO BE TOO MUCH PLIABLE MATERIAL IN THE JOINT TO MAINTAIN PROPER PRE-LOAD. THIS IS FIFTH OCCURRENCE. SB 101SB020 DOES NOT ADDRESS PROBLEM SOON ENOUGH TO PREVENT FUTURE LEAKS. RA5326 AND RA8987 MATERIAL SHOULD BE REVISED.