MDP failure indications consist of which display conditions?

MDP failure indications consist of which display conditions?

• A. HUD and UFCP blank, snowman on MFD
• B. HUD shows a red banner, UFCP blank, MFD normal
• C. HUD and MFD blank, UFCP shows ERROR
• D. HUD displays 'MDP FAIL', UFCP active, MFD normal

Answer: (A)

MDP failure shows up as a loss of data to the main cockpit displays, with a clear visual cue on the MFD. The Main Display Processor feeds the HUD, UFCP, and MFD. When it fails, the HUD and UFCP lose their data and go blank, while the MFD displays a snowman icon to signal the MDP fault. This combination—HUD and UFCP blank with a snowman on the MFD—is the pattern that indicates an MDP failure. Other patterns don’t match this failure mode. For example, a red banner on the HUD would suggest a specific warning rather than a total data loss; a blank HUD and MFD with an ERROR on the UFCP would imply a different fault path; and a visible MDP FAIL message on the HUD with the UFCP active and a normal MFD would be inconsistent with a true MDP failure affecting the MFD display as well.

MDP failure shows up as a loss of data to the main cockpit displays, with a clear visual cue on the MFD. The Main Display Processor feeds the HUD, UFCP, and MFD. When it fails, the HUD and UFCP lose their data and go blank, while the MFD displays a snowman icon to signal the MDP fault. This combination—HUD and UFCP blank with a snowman on the MFD—is the pattern that indicates an MDP failure.

Other patterns don’t match this failure mode. For example, a red banner on the HUD would suggest a specific warning rather than a total data loss; a blank HUD and MFD with an ERROR on the UFCP would imply a different fault path; and a visible MDP FAIL message on the HUD with the UFCP active and a normal MFD would be inconsistent with a true MDP failure affecting the MFD display as well.