As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FT # 255, BOS-DCA. L2 DOOR INDICATION INOP ( DOOR POS IND ON MFD & ASSC EICAS-PAX (L1/L2) AND SERVICE (R1/R2) )DOOR PAX AFT OPEN MESSAGE ON EICAS DURING CLIMB. MESSAGE REMAINED ON FOR DURATION OF THE FLIGHT. AIRCRAFT PRESSURATION WAS NORMAL; FOUND L2 DOOR PROX SENSOR CANNON PLUG LOOSE. TIGHTENED PLUG OPS CHECK NORMAL REF MM 52-72-21 MDDR 416501 CLRD MX-4 UPDATED