As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED COWL FLAP HANDLE BROKE IN THEIR HAND WHEN THE COWL FLAPS WERE CLOSED. INSPECTION REVEALED THE LEVER PN 96324055-33 WORE AGAINST THE DETENT PLATE PN 96-324055-163 AND CUT A GROOVE IN THE LEVER. FURTHER INSPECTION REVEALED THE CHANNEL PN 96-324055-35 HAD CRACKED IN 3 PLACES. THE OTHER LEVER HAD A WEAR MARK STARTING IN IT FROM THE DETENT PLATE.