As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE LT ENGINE DRIVEN PUMP HYDRAULIC PRESSURE LINE PASSING THROUGH THE TRANSITION BOX WAS FOUND CHAFED THROUGH BY 80 PERCENT OF IT'S TOTAL WALL THICKNESS. THE CHAFING OCCURS THROUGH THE FIRE WALL SKIN WHERE THE LINE PASSES THROUGH THE GROMMET.