As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CESSNA TWIN ENGINE AIRCRAFT HAVE EXPERIENCED A HISTORY OF FLAP CABLE FRAYING, ELECTED TO ROUTINELY REPLACE ALL FLAP CABLES ON A 421C HAVING 4,251 HOURS TT. TWO CABLES WERE FOUND IN UNAIRWORTY CONDITION. THE CABLE FRAYING WAS NOT VISIBLE UPON INSPECTION PRIOR TO CABLE REMOVAL.