As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SERVICE DOOR CAUTION MESSAGE IN FLIGHT. CAME ON AT ABOUT 1000 AGL, THEN EXTINGUISHED, AND CAME ON AGAIN AT ABOUT 5 TO 7000 FEET INDICATED MSL. INSPECTED SERVICE DOOR, NO DAMAGE OR DEFECTS NOTED. PRESSURIZED AIRCRAFT TO 4.0 PSI, NO FAULTS FOUND. INTERCHANGED PSEU AND FOUND CODE D122 REF CRJ MM 52-70-01. (M)