• ALL RDDMI Flags In-View: Notes:

  All flags in-view indicates a power loss. The power loss can be caused by a power failure to the indicator or an internal power supply in the RDDMI.

  
  All RDDMI Flags In-View:

  1.Check for power at cannon plug on back of RDDMI. (Connector D9-FO's , D37-Capt's pin 18, 26VAC)
  
  2.If power is available at the cannon plug then replace the indicator
  
  3.If power is not available at the cannon plug then trouble shoot power source.
  
  RDDMI INFORMATION:

  

  
  Circuit Breakers:

  Compass #1: P18-2 = B4.

  Compass #2: P6-1 = B10.

  Instrument Transformer 2: P6-1 = A12.

  Instrument Transformer 1: P18-2 = A1.

  
  Notes:

  The F/O’s RDDMI (on the majority of aircraft) receives power from the 115v AC STBY Bus. If this bus is not power you will get all flags in-view on the F/O’s RDDMI as well as the Captain’s ADI and HSI. If this happens check standby power switch on the P5 panel. Lift the cap and ensure that the switch is fully in the "Auto" position. This switch has a tendency to hang up between Off and Auto when the cap is closed. On aircraft where the RDDMI receives on-side heading, The captains RDDMI is powered off the 115v AC STBY Bus.

  
  Applicable deferrals 34-42=Radio Magnetic Indicators, (No flags on associated HSI/ADI).

Training Only