As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 581 - MDT-MCO - DIVERTED TO GSO DUE TO LOG ITEM 'APU FIRE WARNING AND BELL INTERMITTENT IN FLIGHT'. APU WAS NOT RUNNING APU FIRE HANDLE PULLED. INSPECTED APU AND FOUND NUMEROUS CRIMPS IN LOWER APU FIRE DETECTION LOOP (FWD). REMOVED AND REPLACED THE APU LOWER FIRE DETECTION LOOP IAW MM 26-15-12. OPS CHECK THE SYSTEM AND CHECK GOOD. (M)