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. **SUPPLEMENTAL REPORT REQUIRED** (OPEN)