What was found
CREW REPORTED CARGO DOOR WARNING LIGHT ILLUMINATED & ALARMED IN THE DESCENT OUT OF FL 290. CABIN PRESS GAUGES AT THE TIME OF OCCURRENCE SHOWED 7 PSI, 5000’ CABIN PRESS. THE WARNING LIGHT TURNED OFF AT 5000’ MSL, 1.4 PSI & 2400’ OF CABIN PRESS. CREW COMPLETED APPROPRIATE DOOR WARNING CHECKLIST & DECLARED EMER WITH ATC. CREW ELECTED TO REMAIN ON PLANNED DESTINATION AIRPORT AS THEY HAD ALREADY BRIEFED, SET UP & PREPARED FOR THE APPROACH & ILS 34R WAS A STRAIGHT IN APPROACH. ACFT LANDED WITHOUT FURTHER INCIDENT. WHILE COMPLYING WITH OPERATIONAL TEST FOUND PIN F ON CONNECTOR P1 TO BE BAD. REPLACED IAW DA20 WDM 52-30-25. RE-COMPLIED WITH OPERATIONAL TEST OF CARGO DOOR IAW DA20 MM 52-70-6. SYS CHECKED GOOD. PERFORMED RIGGING CHECK IAW DA-20 MM 52-30-01. RIGGING CHECKED GOOD WITH NO DEFECTS NOTED.