Service difficulty report · Bearing · Robsin R44

Difficulty date
August 31, 1995
Submitted
March 26, 2000
Operation
Air carrier
Make and model
Robsin R44
Part
Bearing
Part number
C1281
Condition
Cracked
Location
T/R Flapping
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

(CAN)DURING FACTORY ACCEPTANCE THE PILOT/OWNER REPORTED THAT THE FORCE REQUIRED FOR FLAPPING THE TAIL ROTOR WAS EXCESSIVE. COMPANY FLIGHT TEST RESPONDED THAT THIS WAS NORMAL FOR A NEW AIRCRAFT. DURING THE IMPORT INSPECTION THE FLAPPING BEARING INNER RACE WAS FOUND CRACKED, WHICH WAS CAUSING EXCESSIVE STIFFNESS.