What was found
PHX - FLT 723 - ON DEPARTURE, THE FLT CREW REPORTED THE FOLLOWING, ON CLIMB-OUT FROM PHX GOT FIRE WARNING BELL, BUT NO OTHER INDICATION OF A FIRE. DUMPED FUEL. RETURNED TO PHX. UNEVENTFUL LANDING. CHECKED FIRE LOOP FOUND GROUND WIRE LOOSE LEFT W/W TIGHTENED SAME, REINSTALLED FIRE DET MODULE, PERFORMED FIRE WARNING TEST. ALL SYSTEM FUNCTION NORMAL. (M)