What was found
BLEED 1 LEAK IN CRUISE AT FL340. RAN QRH. MESSAGE DID NOT EXTINGUISH; HOWEVER IT FLUCTUATED ON AND OFF THE REMAINDER OF FLIGHT. ASSOCIATED BLEED 2 FAIL CAUTION MESSAGE AFTER QRH ACCOMPLISHED. (FLT 5401 FILED CLOSED)TROUBLESHOOT THE BLEED 1 LEAK CAUTION MESSAGE REFERENCING FIM 36-21-00-81-803. FOUND AMS CTRL MICRO MOD (SPDA2 SLOT 18) CARD TO BE FAULTED INTERNALLY. REMOVED AND REPLACED AMS CONTROLLER CARD (SPDA2 SLOT 18) REFERENCING AMM 21-00-01-000/400. PERFORMED OPERATIONAL CHECK OF AMS CONTROLLER CARD. OPS CHECK GOOD AT THIS TIME.