Service difficulty report · Bearing

Difficulty date
March 15, 2005
Submitted
April 26, 2005
Operation
General aviation
Engine
Cont IO550F
Part
Bearing
Part number
SA634503M010
Condition
Damaged
Location
Crankshaft
Stage of operation
IN
How discovered
V
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

UPON DISASSEMBLY IT WAS NOTED THAT THIS BEARING SHELL IS BROKEN. IT IS LOCATED IN NR 2 FROM REAR SADDLE. IT APPEARS THAT THE BEARING HAS WORKED AND IS POLISHED AS RESULT: THE CRANKSHAFT, SN C159618N HAS OVERSIZED BLADE BUSHING BOSSES. UPON DISASSEMBLY, (LOOSE BUSHINGS) NOTE: FRETTING ON PARTING SURFACE AS A RESULT OF THE BEARING WORKING, THE BEARING TANG IN THE SADDLE HAS BEEN MALFORMED.