As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE B FIRE LOOP HAD AN INTERMITTENT FAULT WITH A FIRE LOOP. THE B FIRE LOOP WAS CYCLED OFF & ON WHICH TERMINATED WARNINGS. ALL ENGINE PARAMETERS NORMAL AND ALL LIGHTS TESTED GOOD. NO FURTHER FAULTS ON APPROACH OR LANDING. REPLACED THE 39VD DIODE MODULE FOR THE NR 2 ENGINE FIRE DETECTION SYSTEM IAW AMM CHAPTER 20 STANDARD PRACTICES, AND AWM 26-12-11, PAGE 1. SYSTEM OPS CHECKED GOOD.