What was found
FORWARD CARGO DOOR LIGHT CAME ON AT FL320 JUST LEVELED OFF LIGHT REMAINED ON & CABIN PRESS BEGAN RISING AT 500 FT. BEGAN EMERGENCY DESCENT TO FL100. MAX CABIN PRESS REACHED WAS 9500 FT, DECLARED EMERGENCY & DIVERTED TO KPHL. UNEVENTFUL LANDING & TAXI IN. RELEASED FOR SERVICE IAW MEL 52-71-01-A CATEGORY C. DOOR CLOSED & LOCKED INDICATION ON ECAM DOOR PAGE INOPERATIVE. FWD LOWER DOOR VISUALLY CHECKED CLOSED & LOCKED PRIOR TO EACH DEPARTURE. INSTALLED SWITCH 16 WS IAW AMM 52-71-11-04-09, OPERATIONS CHECKED GOOD. IAW MTSI SWITCH 14WS WAS REPLACED. FWD LWR CARGO DOOR WARNING SYS OPERATIONS CHECKED GOOD.