As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRE WARNING WENT OFF MOMENTARILY IN FLIGHT NR 2 ENGINE AND APU FIRE DETECTION SYSTEM WOULD NOT TEST THEREAFTER. INSPECTED NR 2 ENGINE AND FOUND LOOSE CONNECTOR ON LOWER FIRE LOOP. SECURED AND SAFETY-TIED CONNECTOR. OPS CHECK OK. AIRCRAFT RETURNED TO SERVICE. (M)