As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EICAS MSG LT ENG FIRE LP2 AND LT ENG FIRE LP1 DISPLAYED. ALSO FIRE PROT SYS FAIL LIGHT ILLUMINATED. FLIGHT RETURNED TO POP. PLACARDED THE NUMBER 2 LOOP INOPERATIVE PER MEL. NUMBER 1 LOOP CHECKED OK, AND NO LEAKS WERE FOUND. CHECK-C 7-11-99 LAX.