As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CLIMB C1A CARGO DOOR OPEN LIGHT CAME ON AT 6.5 DIFF PRESSURE, AIRCRAFT RETURNED TO BASE. DURING DESCENT THE LITE EXTINGUISHED AT 4.5 DIFF PRESSURE.MAINTENANCE INSPECTED DOOR CLOSING AND LOOKING MECHANISM NO FAULT FOUND. DOOR RIGGING CHECKED FOUND THE PROXIMITY SWITCHES AT THE MAXIMUM TOLERANCE OF AMM, SWITCHES READJUSTED TO THE MINUMUM LIMITS AND AIRCRAFT RELEASED FOR A TEST FLIGHT.TEST FLIGHT FOUND THE SYSTEM SERVICEABLE.