What was found
CARGO AFT FIREX HI ARMED MESSAGE WITH CARGO SMOKE FIRE EXTINGUISHER AFT PUSH BUTTON ILLUMINATION. 1 MIN LATER, CARGO FIREX HI DISCHARGE STATUS MESSAGE ILLUMINATED AND CARGO FIREX LO ARMED MESSAGEI LLUMINATED. 1 MINUTE LATER, CARGO AFT FIREX LOW ARMED MESSAGE EXTINGUISHED. DECLARED EMERGENCY, DIVERTED TO DCA, LANDED WITHOUT INCIDENT. AFTER LANDING, CARGO AF1 FIRE SYS FAIL AND CRG FWD FIRE SYS FAIL CAUTION MESSAGES ILLUMINATED. T/S PER FIM 26-23-00-810-809-A. R&R GEN I/O MODULE 3 IAW AMM 31-46-06. R&R LOW AND HIGH RATE CARGO FIRE EXTINGUISHING BOTTLES IAW AMM 26-23-01.