What was found
PILOT REPORTED THAT WHILE CLIMBING THROUGH 8,000 FT HAD A CABIN DOOR ANNUNCIATOR ILLUMINATE, NO EMERGENCY DECLARED, RETURN TO BASE. MX CHECKED CABIN DOOR SWITCHES FOR LOOSE CONNECTIONS, LUBRICATED. SWITCHES OPS CHECKED GOOD REF AIM 12-10-0, CHAP 12. REMOVED FROM DML. REMOVED PLACARDS.