As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REQUIRES MULTIPLE ATTEMPTS WHEN SHUTTING MAIN CABIN DOOR TO GET RED "PASSENGER DOOR" EICAS MSG TO EXTINGUISH, EVEN THOUGH ALL GREEN FLAGS ARE VISIBLE AND EXTERIOR HANDLE AND VENT FLAP ARE CONFIRMED FLUSH. PERFORMED OPERATIONAL TEST OF THE PASSENGER DOOR, OPS CHECK GOOD UNABLE TO DUPLICATE THE PROBLEMS AND C/W LUBRICATION OF THE PASSENGER DOOR (EXTERNAL) IAW AMM 52-11-00-710-801 & 12-20-04-640-807. NO OTHER DEFECTS NOTED AT THIS TIME.