What was found
PILOT REPORTED THAT ON APPROACH TO LANDING THAT HE ADVANCED PROP TO FULL RPM AND THE PROP CONTROL LEVER BROKE OFF IN HIS HAND, INSTALLED A NEW PROP CONTROL LEVER. OLD PART SHOWS EVIDENCE THAT IT WAS CRACKED FOR SOME TIME PRIOR TO THIS, BUT WENT UNDETECTED DUE TO A PLASTIC COATING ON THE LEVER. RECOMMEND A CLOSER INSPECTION THAT WOULD INCLUDE THE REMOVAL OF THIS PLASTIC COATING IF A CRACK IS SUSPECTED.