As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: L1 DOOR LIGHT LIGHT ILLUMINATED OFF / ON PASSING THROUGH 16,000 UNTIL 20,000 FEET. FLIGHT ATTENDANT VERIFIED DOOR HANDLE DOWN. PRESSURIZATION NORMAL. ADJUSTED DOOR INDICATION SENSOR S199 PER AMM 52-71-11. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.