SDR 97ZZZX1451

Service difficulty report · Bearing

Difficulty date: March 17, 1997
Submitted: March 26, 2000
Operation: General aviation
Filed by: VA1R551K
RAM Aircraft, Limited Partnership
Engine: Cont GTSIO520*
System (JASC): 8510 · Reciprocating Engine Front Section
Part: Bearing
Part number: 634503
Condition: Mispackaged
Location: Prop Drv Gear
Stage of operation: IN
Nature of condition: W
Precautionary procedure: K

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

What was found

P/N 630571 (BEARING FOR PROP DRIVER GEAR IN ENGINE CRANKCASE) MARKED ON PACKAGING AS P/N 630571. BEARING ITSELF MARKED AS P/N 634503. P/N 634503 IS CRANKSHAFT MAIN BEARING. PURCHASED NEW FROM TELEDYNE CONTINENTAL MOTORS. BEARINGS WILL FIT IN CRANKCASE SADDLES WHEN SWITCHED, BUT OIL HOLES DO NOT LINE UP AND BEARING OIL GROOVES ARE DIFFERENT WIDTHS. COULD CAUSE BEARING FAILURE/OIL STARVATION.