As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: JUST PRIOR TO GATE DEPARTURE 1R CABIN DOOR "ARMED " INDICATION OF ECAS WILL FLASH ON AND OFF INTERMITTENTLY ALONG WITH FLASHING"SLIDES " INDICATION ON FA PANEL. MAINTENANCE REPLACED 4WN2 PROX SENSOR PER AMM 52-73-11, 52-73-00 AND 52-11-14.