As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: ON TAKEOFF ROLL THROUGH 500 FT, MASTER CAUTION AND FORWARD ENTRY DOOR LIGHT WAS INTERMITTENT, DOOR HANDLE VERIFIED DOWN, PRESSURIZATION NORMAL, FORWARD ENTRY LIGHT NEVER ILLUMINATED AFTER 500FT. REPLACED DOOR WARNING MODULE PER AMM 52-71-00.