What was found
ACFT HAD FAILURES OF HORIZ STAB ANTI-ICE SYS. EACH FAILURE COULD NOT BE VERIFIED TO WORK AFTER REPLACEMENT OF FL-94 CURRENT LIMITER WHICH WAS BLOWN FROM OVERCURRENT SITUATION, T/S FND WIRE NR 10 FROM TERM BLK TB-5 JUNC IN AREA OF VERT STAB TIP CAP CHAFED & BURNED DUE TO CONTACT WITH STRUCT, FS-651.455. LOOP FROM HEAT BLANKET TO TERM BLK NOT CORRECT, ALLOWED WIRE BUNDLE TO CONTACT ACFT STRUCT WHEN STAB TRIM WAS MOVED & RUBBED INSULATION AWAY ALLOWING WIRE TO SHORT OUT WHEN SYS ENERGIZED & STAB POSITION ALLOWED CONTACT OF WIRE. ARCING BURNED FLANGE OFF STIFFENER AN INCH & DAMAGED INSULATION OF WIRES IN BUNDLE. ONE-TIME INSP OF RT & LT STAB HEAT SYS WIRING IS CALLED FOR TO PREVENT DAMAGE TO SURROUNDING STRUCT.