As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DOOR: DURING NORMAL OPERATIONS, HEARD AN UNUSUAL SNAP SOUND WHILE OPENING THE DOOR, BUT DOOR OPERATION WAS NORMAL. DURING PREFLIGHT THIS MORNING A BROKEN SPRING WAS DISCOVERED ON THE LEDGE OF THE DOOR WELL BEHIND THE MAIN AIRSTAIR DOOR.///SIGN-OFF///INSTALLED 2 NEW SPRINGS P/N S2952-45 TO MAIN DOOR LATCHING MECHANISM. IAW AMM 52-10-40. OPS CHECK GOOD.