As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE FIRE DETECTION LOOP "B" INOPERATIVE. ACFT GROUNDED. INSPECTED ALL ENGINE FIRE LOOPS. FOUND LT UPPER FAN TERMINAL BROKEN AT M1757. REPAIRED IAW 26-11-02/801. REINSTALLED HARNESS REF 26-11-02/401 RETURNED SYS TO NORMAL. PERFORMED SYS OPS TEST REF 26-10-00-710-801. SYS CHECKED NORMAL.