As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED A FWD PASSENGER DOOR OPEN MESSAGE ON EICAS OUT OF FL 210 AND WENT OFF AT 10,000 FT. DOOR INDICATIONS WERE GREEN AND PRESSURE WAS STABLE, CREW DID NOT DECLARE AN EMERGENCY AND LANDED WITHOUT INCIDENT. MX INSPECTED DOOR AND FOUND ROLLER SHAFT DETECTOR BROKEN. R & R ROLLER SHAFT IAW AMM AND OPS CHECKED GOOD.