As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PASSING 14000 FT FUSELAGE DOOR ANNUNCIATOR LIGHT ILLUMINATED, FOUND CARGO DOOR TO SHOW OPEN ON MFD, LOST PRESSURIZATION AND FA REPORTED LOUD NOISE COMING FROM THE BACK LEFT SIDE. RETURNED TO FIELD. FOUND AFT BAGGAGE DOOR "T" HANDLE POPPED OUT. RESECURED HANDLE, WARNING LIGHTS EXTINGUISHED. PERFORMED OPS CHECK IAW AMM 52-31-01. CHECKS GOOD.