What was found
DURING DECENT INTO DJI EXPERIENCED A VIBRATION FOLLOWED BY A CYAN RT HYD PUMP FAIL CAS MESSAGE. AS WE WERE JOINING THE FINAL APPROACH COURSE AN AMBER R HYD PUMP FAIL MESSAGE APPEARED. RAN CHECKLIST FOR THE CAS MESSAGE. DECLARED AN EMERGENCY ONCE RECEIVED THE AMBER CAS. WE ALSO NOTED A CYAN R ENG FAULT MESSAGE, FLAPS RATE LOW & AN AMBER R STARTER FAIL MESSAGE ON FINAL. TROUBLED SHOT START SYS. CHECKED RESISTANCES OF RT START CONTROL VALVE & WIRING CIRCUITS. FOUND AT PIN A OF CONNECTOR W4P6 HAS VERY UMN RESISTANCE LOW RESISTANCE. ISOLATED CIRCUITS & FOUND CIRCUIT BREAKER R/ATS/HYD SOL POPPED. DISCONNECTED HYD BYPASS VALVE ON RT PUMP RESISTANCE WENT TO OPEN. CHECKED RESISTANCE OF PUMP BYPASS VALVE GOT ABOVE 100 OHMS. RECONNECTED CONNECTOR AT PUMP RESISTANCE WENT TO 1.4 OHMS. CHECKED RESISTANCE AT PIN 1 ON PUMP TO GROUND GOT .3 OHMS SHOULD BE OPEN. REF WIRING MANUAL SEC 80-11-00. REMOVED FAULTY NR 2 HYD EDP & INSTALLED MODIFIED HYD PUMP WITH O-RING IAW AMM 29-12-01. OPS & LEAK CHECKED GOOD. ENGINE START SUCCESSFUL. NO FURTHER DEFECTS NOTED AT THIS TIME.