As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF RETRACTED GEAR. NORMAL INDICATION ON EICAS OF GEAR RETRACTED, BUT FELT & HEARD THAT THE DOOR WAS STILL OPEN. RETURNED TO DFW. R & R NLG DOOR SEQUENCE PROXIMITY SWITCH IAW AMM 32-63-03. LG OPERATIONS CHECKED GOOD AT THIS TIME.