As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND ON APPROACH, CABIN DOOR MADE BANGING NOISE (BELOW 5000 FEET). NO CAS MSGS. NO PRESSURIZATION ISSUES. PERFORMED ADJUSTMENT OF THE MAIN CABIN DOOR PRESSURE PREVENTION PANEL ADJUSTMENT ROD. REPLACED ADJUSTMENT ROD LOCKING TAB WASHER. PERFORMED SATISFACTORY OPS CHECK. WORK PERFORMED IAW CE-680A AMM 52-10-04.