• VOR No Computed Data (NCD): Notes:
  • The VOR deviation pointers are removed. The scales remain in view on the Nav Data Display.
  
  
  • The TO/FROM pointer is removed from the Nav Data Display and the VOR frequency on the Nav Data Display is changed to dashes.
  
  
  • To display NCD a VOR frequency must be tuned on the Nav Control Panel, and the NAV Data Display must be set to VOR.
  
  
  
  
  VOR NCD Possible Causes:

  Before replacing any component perform BITE if available. Perform a VOR receiver bite in the E&E or a nav radio control panel test.

  
  

  1.VOR Receiver

  
  

  2.Nav Control Panel
  
  

  3.VOR Antenna
  
  

  4.Wiring from Nav Control Panel to VOR Receiver
  
  

  5.Wiring from Nav Control Panel to VOR Receiver
  
  

  6.No signal/ Ground station out-of-range
  
  VOR NCD:

  

  
  

  

  
  Circuit Breakers:

  VOR #1: P18-1 = A1.

  VOR #2: P6-1 = A12.

  NAV Control Panel #1: P18-1 = A3.

  NAV Control Panel #2: P6-1 = A15.

  NAV Sensor DC-1: P18-1 = B1.

  NAV Sensor DC-2: P6-1 = A10.

  
  
  Applicable deferrals MEL 34-17-01 VHF Navigation Systems (#2 VOR System)
  

Training Only