As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, CAPT'S MASTER WARNING LIGHT ILLUMINATED INTERMITTENTLY WITH NO BELL. MAINTENANCE FOUND A LOOSE GROUND WIRE AT MAIN DECK SMOKE DETECTOR 1A. PROBLEM WAS DUPLICATED BY MOVING WIRE. GROUND WIRE WAS TIGHTENED. ALL SMOKE DETECTORS TESTED GOOD.