As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE AT FL 370 WE HAD AN INTERMITTENT NR 2 FIRE INDICATION. AFTER BOTH BOTTLES WERE FIRED THE FIRE INDICATION REMAINED CONSTANT FOR APPROX 10 MIN AND WAS INTERMITTENT THROUGH REMAINDER OF FLT. LOOP-A FAILED TO TEST FOR FIRE WARNING, SHORT TEST GOOD.