What was found
FLT NR 4561 - BOS-ACK - DURING CLIMB-OUT, THE MAIN CABIN DOOR HANDLE WARNING LIGHT ILLUMINATED. THE AIRCRAFT RETURNED TO BOS AND LANDED WITHOUT INCIDENT. THE DOOR WAS CONFIRMED LATCHED AND THE DOOR WARNING HANDLE LIGHT WAS DEFERRED PER MEL 57-70-1. AIRCRAFT WAS RETURNED TO SERVICE. ON SEPT 28, THE SWITCH FOR THE HANDLE LIGHT WAS ADJUSTED AND THE SYSTEM OPS CHECKED GOOD. MEL SIGNED OFF AND AIRCRAFT RELEASED TO SERVICE. (M)