As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1600 BOS-DCA,ON TAKEOFF ROLL AT 80 KNOTS L2 PAX DOOR IND UNSAFE. PRIOR TO PUSH L2 SHOWED AMBER CIRCLE WITH BLACK X UNTIL DOOR WAS CYCLED SEVERAL TIMES WITH GREEN INDICATION. UNEVENTFUL REJECTED TAKEOFF WITH RETURN TO GATE. (DOOR POS IND ON MFD & ASSC EICAS-PAX/SVC) ADJUSTED LINKAGE TO SENSOR FOR VENT FLAP. OPS CHECK GOOD IAW AMM 52-11-25.