As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE, FIRE DETECTOR LOOP B INOPERATIVE. OK TO CONTINUE IAW MEL 26-2-01 XB. NR 1 ENGINE 34B& 34 LOOPS, ENGINE OVERHEAT & FIRE DETECTION SYS . PERFORMED AN OPS TEST OF NR1 ENGINE FIRE DETECTOR LOOP B IAW AMM 26-11-00. OPS CHECKED GOOD.