As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN HSI INDICATING 180 DEGREE ERROR IN HEADING WITH RED HDG INDICATION FIRST OFFICER RMI HAS RED FLAG. FOUND WIRES LOOSE FROM LEFT FLUX DETECTOR WIRING HARNESS AT LEFT WINGTIP. RESET PINS, OPERATIONAL CHECKED OF LEFT HEADING SYSTEM GOOD.