What was found
THE CREW HAD REPORTED SEVERAL TIMES REGARDING AN INTERMITTENT OR COMPLETE FAILURE OF THE NR 1 AHRS SYS. AFTER EACH REPORT MX TROUBLE SHOT BUT COULD NOT VERIFY THE ACTUAL CAUSE OF THE FAULT OR FAILURE OF THE SYS. AFTER A FEW MORE REPORTS FAILURES OF THE NR 1 AHRS SYS. TROUBLE SHOT & FOUND WIRE W32-29 PINCHED IN AN A CLAMP & CHAFED THROUGH CAUSING A GND TO STRUCTURE IN THE TAIL CONE AREA. THE WIRE WAS REPAIRED & THE SYS OPERATED CORRECTLY.