What was found
CUSTOMER REPORTED DUAL TACHOMETER P/N: A792-4 ROTOR NEEDLE WAS JUMPING AROUND (NIL TSOH). FURTHER INSPECTION REVEALED SCREW BACKED OUT OF INTERNAL PLATE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
CUSTOMER REPORTED DUAL TACHOMETER P/N: A792-4 ROTOR NEEDLE WAS JUMPING AROUND (NIL TSOH). FURTHER INSPECTION REVEALED SCREW BACKED OUT OF INTERNAL PLATE.