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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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04/26/21

Message Overview:

Message Name:

AUDIO BEEPS AFTER TRANSMISSION

Identifier: 231OBS001
Effectivity: AIRCRAFT: 20501 - 20999
System: Communication
Associated CAS: None
System Description: 23-11-00
Schematic Diagram: 23-11-00
Wiring Diagram: 23-11-01

Message Description:

The VHF-4000 outputting a Morse Code "M" (two long beeps) is a fault indication.

There is a problem with the radio or peripheral equipment (control head, antenna, etc.) Troubleshoot the radio/installation to determine the source of the problem.

Possible Causes:

  • VHF Transceiver 1 (A7)
  • VHF Transceiver 2 (A8)
  • VHF Transceiver 3 (A10)
  • VHF Antenna
  • Tuning

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the VHF Communication Unit AMM 23-11-01-000-801
Installation of the VHF Communication Unit AMM 23-11-01-400-801

Troubleshooting Recommendations:

  1. Troubleshoot the radio/installation to determine the source of the problem.

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