What was found
(CAN) TACHOMETER CABLE DRIVE SEPARATED FROM OUTER SHAFT HOUSING, AND TURNING BELOW TRUE ENGINE RPM WHICH IN TURN GAVE FALSE INDICATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) TACHOMETER CABLE DRIVE SEPARATED FROM OUTER SHAFT HOUSING, AND TURNING BELOW TRUE ENGINE RPM WHICH IN TURN GAVE FALSE INDICATION.