As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FIRE DETECTION SYSTEM RIGHT ENGINE LOOP-B LIGHT AND FIRE WARNING ON IN FLIGHT MOMENTARILY, THEN WENT OFF. BOTH INDICATIONS AGAIN ON THE GROUND BOTH WITH ENGINE RUNNING AND AFTER ENGINE SHUT DOWN. TESTED FIRE WARNING. FOUND NR 2 ENGINE B-LOOP STICKING IN TEST WITH FIRE INDICATION. REPLACED A2-6 RIGHT FIRE DETECT AMP (CONTROL). TESTED FIRE WARNING SEVERAL TIMES. OPS TEST NORMAL ON B-LOOP NR 2 ENGINE. A-LOOP NR 2 ENGINE STILL ON MCO AND PLACARD.