As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PREFLIGHT FIRE TEST HANDLE NR 1 DOES NOT TEST PROPERLY AND FAULT LIGHT ILLUMINATES. PERFORMED FIM TASK 26 10 00 810 805 FOUND UPPER FAN DETECTOR RESISTANCE NOT WITHIN LIMITS. REPLACED UPPER FAN DETECTOR ASSY M01757 IAW AMM 26 11 01, OPS CK GOOD PER AMM 26 11 00 710 801.