As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE FAILS OVHT/FIRE TEST TESTED BOTH SIDES AND SIDE B FAILS. GROUNDED - YES. TESTED NR 2 ENGINE FIRE DET, NO FAULTS AND BOTH A & B SYS OP'S NORMAL. PER TECH SERVICES REQUEST REMOVED & REPLACED LOWER FAN FIRE DETECTOR LOOP PER AMM 26-11-01-000-802/26-11-01-400-802 AND FAN HARNESS PER AMM REF 26-11-02-000-801/26-11-02-400-801. OP'S CK'S GOOD. ETOPS GROUND VERIFICATION OPS NORMAL. THIS CLEARS MEL 26-2B.