What was found
EQUIP LIGHT ILLUMINATED AT 6000 FT.A/C WAS NOT PRESSURIZING UPON ARRIVED TO GATE FOUND MAIN E&E DOOR OPEN,TEST E&E DOOR WARNING FOUND S197 DOOR SWITCH FAULTY INTERMITTENT. REQUEST MEL 5271W FOR WRITE UP. VERIFIED THAT E&E DOOR IS CLOSED AND LOCKED. TOMC APPROVED MEL 5271W EQUIPMENT DOOR OPEN WARNING LIGHT INOPERATIVE. PLACED E&E DOOR INDICATION ON MEL 5271W. VERIFIED THAT E&E DOOR IS SECURED CLOSED BEFORE FLIGHT.