SDR 98ZZZX4087

Service difficulty report · Crankshaft · Robsin R22

Difficulty date
October 16, 1998
Submitted
March 26, 2000
Operation
General aviation
Make and model
Robsin R22
Engine
Lyc O320B2C
Part
Crankshaft
Condition
Out Of Tolerance
Location
Engine
Part time
1,982 hours
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

DURING TRIAL ASSY OF NEW CRANKSHAFT GEAR P/N 13S19646, MARKED 7/89, 27/98, MFR 30620, NOTED THAT GEAR WOULD NOT START INTO CRANKSHAFT COUNTERBORE DUE TO INTEFERENCE WITH THE COUNTERBORE ID AND/OR STD-1065 DOWEL. CRANKSHAFT WOULD BE ASSEMBLED WITH EARILIER 61155 GEAR, BUT NOT WITH NEW 13S19646, DUE TO AN APPARENT OUT-OF-TOLERANCE CONDITION OF THE DOWEL HOLE IN EITHER THE CRANKSHAFT OR THE GEAR. CRANKSHAFT DOWEL HOLE WAS RELOCATED WITH OVERSIZE DOWEL TO PERMIT ASSY.