What was found
DURING CLIMB RIGHT CSD OUTLET TEMP HIGH WAS PRESENTED, CHECK LIST WAS PERFORMED AND THE RIGHT CSD DOESN’T DISCONNECTED, ALSO THE A.P.U. DID NOT START AT THE AND ALTITUDE OF 20000. THE CREW DECIDED TO TURN BACK TO CTG THE RIGHT CSD OIL PRESS LOW ANN CAME ON TROUGH 10000 FT AND THE APU START AT THE 3TH ATTEMPT.CORRECTIVE ACTION:WAS TRANSFER TO DMI 202 MEL 24-1-1 CAT B, IN ORDER TO CLOSE THAT DMI, THE CSD WAS REPLACED IAW AMM 24-10-01 PAGE 401 AND OIL COOLER WAS REPLACED IAW AMM 24-10-03 PAGE 201 RUN UP RH ENGINE TEST SATISFACTORY IAW AMM 71-00-00