What was found
AIRCRAFT WAS GROUNDED: REPEAT ITEM. COCKPIT DOOR OPEN LIGHT ILLUMINATED ON CLIMB OUT. STAYED ILLUMINATED ALL FLIGHT AND DOOR WAS CONFIRMED CLOSED WITHNO STRIKER LIGHTS. UPON LANDING AND BRAKING, THE DOOR SWUNG OPEN ON THE RUNWAY. THE OPEN LIGHT EXTINGUISHED UPON CLOSING, THEN REILLUMINATED DURING TAXI IN WITH THE ADDITION OF A FAULT LIGHTAND A BOTTOM STRIKER LIGHT. MAINTENANCE REPLACED COCKPIT DOOR LOWER ELECTRICAL RELEASE STRIKE IAW AMM 52-51-12.