AN FMC failure is shown by:
A. the message ‘FMC FAIL’ in the ANCDU scratch pads
B. ‘FMC’ in center of the ANCDU and the illumination of ‘FMC’ light on ASA
C. blank displays on the ANCDUs
D. illumination of ‘FMC’ light on ASA and the IRS LEGS page being displayed on the ANCDU