Service difficulty report · Bearing · Robsin R44

Difficulty date
November 26, 2007
Submitted
January 21, 2008
Operation
General aviation
Make and model
Robsin R44
Aircraft time
6,946 hours
Engine
Lyc O540F1B5
Part
Bearing
Part number
C1591
Condition
Spalled
Location
M/R Blade
Part time
652 hours
Component
M/R Blade Assy · Robsin
Component part number
C0056
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

(CAN) WHILE CONDUCTING A DI, THE M/R BLADE BOOT WAS FOUND DISTORTED. THE BOOT WAS REPLACED AND A CHECK OF THE SPINDLE BEARINGS WERE FOUND TO BE ROUGH. FURTHER INVESTIGATION REVEALED THE NR 6 BEARING INNER RACE WAS FOUND SPALLING. BEARING REPLACED AND ASSY REINSTALLED. (TC NR 20071127003)