What was found
RECEIVED PRESN MAN FAIL AND PRESN AUTO FAIL MESSAGES SIMULTANEOUSLY WITH SEVERAL CABIN PRESSURE BUMPS. ALSO RECEIVED CABIN DIFF PRESS FAIL. DECLARED EMERGENCY, DIVERTED TO JFK, LANDED WITHOUT INCIDENT. LOWERED RESISTANCE TO BONDING JUMPER CONTACT, OPS CHECK GOOD IAW AMM 21-31-00-710-801-A/500.