As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING OPERATIONAL CHECK OF HYDRAULIC POWER TRANSFER UNIT SYSTEM,ARCING WAS OBSERVED AT WIRING BUNDLE CLAMP (APPROX) 2 FEET FROM RIGHT HAND ACMP POWER CONNECTOR. OPERATIONAL CHECK STOPPED , WIRING CLAMP REMOVED WHICH REVEALED CHAFFING AND ARCING OF RT ELECTRIC HYDRAULIC PUMP WIRES W228-001-8,W228-002-8,W228-003-8.