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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:

VERTICAL SPEED FLAG (Caution)

Identifier: 341OBS009
Effectivity: AIRCRAFT 20501 - 20999
System: Navigation
Associated CAS: None
System Description: 34-13-00
Schematic Diagram: None
Wiring Diagram: 34-13-05
34-13-09

Message Description:

The amber 'VS' caution flag identifies that the on-side V-Speed data is inaccurate.

  • Vertical speed computations are made based on the loaded performance data base in the FMS. Valid aircraft information and take-off conditions must be programmed.
  • If the conditions are met, data bus information for display is internal to the IAPS from the Flight Management 850 cards.
  • MDC troubleshooting information may help isolate data validity, prior to component replacement and data bus ring-out.

45_current_faults

Possible Causes:

  • Air Data Computer (ADC) (A1)
  • Primary Flight Display (PFD) (A29)
  • Multi-Function Flight Display (MFD) (A27)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: Make sure the Pitot-Static Air Data system lines are properly purged and free of obstructions.

Quick Links:

None

Troubleshooting Recommendations:

  1. None

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