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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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07/01/21

Message Overview:

Message Name:

HEAD-UP-DISPLAY (HUD) COMBINER UNIT IMPROPER OPERATION

Message Code: 343OBS001
Effectivity: Post SB 700-34-002 and 9140 and Subs
System: Head-Up-Display (HUD) System
System Description: 34-32-00
Schematic Diagram: 34-32-00 [ Global Express ]  [ G5000 ]  [ GlobalXRS ]
Wiring Diagram: 34-32-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The Head-Up-Display (HUD) Combiner Unit does not show images or does not move correctly or does not stay in the operational, breakaway and stowed positions.

Possible Causes:

  • Head-Up-Display (HUD) Combiner Unit (COU) (MT216)

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • SB 700-34-002 - Modification-Head-Up Display System - Installation

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Connect Electrical Power to the Aircraft AMM 24-00-00-861-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Remove the Electrical Power from the Aircraft AMM 24-00-00-861-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Head-Up-Display
(HUD) System		 AMM 34-32-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Head-Up-Display (HUD)
Combiner Unit		 AMM 34-32-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Head-Up-Display (HUD)
Combiner Unit		 AMM 34-32-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Lock the HUD combiner unit in the operational position. Perform the operational test of the HUD system. Does the HUD MISALIGN message show on the EICAS display?

    1. If YES, perform the troubleshooting for CAS message HUD MISALIGN (Advisory).
    2. If NO, continue with next step.

  2. Replace the head-up-display (HUD) combiner unit.
  3. Do close out.

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