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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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06/29/21

Message Overview:

Message Name:

ELT SELF-TEST CODED SIGNAL INDICATES 5 FLASHES

Message Code: 256OBS003
Effectivity: All
System: Emergency
System Description: 25-60-00
Schematic Diagram: 25-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 25-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

Emergency Locator Transmitter (ELT) data is not present.

Possible Causes:

  • Emergency Locator Transmitter (ELT) (A220)
  • Emergency Locator Transmitter (ELT)/Navigation Interface Unit (A263)
  • Integrated Avionics Computer (IAC) 1 (A11)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Notice To Operators (NTO): None

Flight Operation Notifications Manual (FONM): None

NOTE: No troubleshooting is necessary when no ELT/NAV interface unit is installed.

Quick Links:

Removal of the Emergency Locator Transmitter (ELT) AMM 25-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Emergency Locator Transmitter (ELT) AMM 25-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Emergency Locator Transmitter to Navigation (ELT-NAV) Interface Unit AMM 25-61-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Emergency Locator Transmitter to Navigation (ELT-NAV) Interface Unit AMM 25-61-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Integrated Avionics Computers (IAC) AMM 31-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Integrated Avionics Computers (IAC) AMM 31-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap IAC 1 with IAC 2.

    1. If system checks are good, replace IAC 1 and do close out.
    2. If fault remains, continue with next step.

  2. Perform wiring check between ELT and IAC 1.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  3. Replace ELT/NAV Interface Unit.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  4. Replace ELT.
  5. Do close out.

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