As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2551 - BIL - THE CABIN DOOR WARNING LIGHT CAME ON AT 19,000 FEET AT 6 PSID CABIN PRESSURE DURING CRUISE. CREW STARTED DESCENDING AND LIGHT WENT OUT AT 5.5 PSID. CREW LANDED WITH NO FURTHER INCIDENT. MAINTENANCE PERFORMED PRESSURIZATION GROUND CHECK TO 6.0 PSID, DOOR AND SHOOT BOLT LATCH RIGGING WAS CHECKED, NO DEFECTS NOTED. (M)