As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING LT HORIZONTAL STABILIZER DEICE BOOT REPLACEMENT, MAINTENANCE FOUND THE LT DEICE BOOT PLASTIC SUPPLY LINE CUT/WORN APPROXIMATELY 75 PERCENT OF WAY THROUGH WHERE THE TUBE PASSES FROM THE TAIL SECTION THROUGH THE HORIZONTAL STABILIZER STRUCTURE.