As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT THE AFT PASSENGER DOOR WARNING LIGHT ILLUMINATED. THE CREW SAW THE DOOR WAS AJAR AND HELD SHUT BY THE EMERGENCY LATCH HOOK. THEY MADE AN UNEVENTFUL LANDING. MAINTENANCE PERSONNEL DISCOVERED THE HANDLE OVER-CENTER ACTION WAS WEAK. THEY REPLACED THE GAS SPRING CYLINDER (P/N-D41-5211-60-91). THE DOOR OPERATION WAS NORMAL.