As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED NR 1 ENGINE FIRE TEST FAILED. GROUNDED - YES. ACCOMPLISHED FIM TASK 26-10/801. T/S TO NR 1 ENGINE FIRE/DET LOOP A. ACCOMPLISHED FIM TASK 26-10/810. INSPECTED AND CLEANED ALL NR 1 ENGINE FIRE DET LOOP A CONNECTION FOR FAN AND CORE DETECTORS. NO DEFECTS NOTED. ENGINE FIRE TEST OK, REF FIM TASK 26-10/801.