10004 - SC-770 communicating with CAS? SC-770 communicating with CAS? Yes Go to 1544 - 546 - Done - Complete, Notes: 547 No Go to 10009 - 11559 - SC-770 Controller Module Replacement - Formal Procedure, Notes: Note 11556 - Verify that the CAS is communicating with the RPM on the CAS status of health... 11557 - If not, the status of health will indicate “Loss of RPM Communication” or...