What was found
WHEN LANDING GEAR WAS EXTENDED THREE GREEN LIGHTS ILLUMINATED AND AMBER INTRANSIT LIGHT STAYED ON, LH BATTERY VENT CB WAS FOUND POPPED (K-2). WHEN BREAKER WAS RESET, AMBER LIGHT WENT OUT INFLIGHT. AFTER SHUTTING DOWN AT GATE AMBER INTRANSIT LIGHT CAME ON AGAIN, CB DID NOT POP. MAINTENANCE REMOVED AND REPLACED NOSE LANDING GEAR DOWNLOCK SWITCH. ALL CHECKS GOOD.