747 Captain's Instrument Display Source Select Panel
by jerome meriweather
   

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FLT DIR Selector NAV Selector EIU Selector IRS Selector AIR DATA Selector
747 Photo and/or Graphic Element
  

 

 

Air Data Selector
Selects the ADC providing Airspeed, Altimeter and calibration for the VSI to the associated PFD.
IRS Selector
Selects IRS providing Attitude and vertical speed information to the respective PFD.
EIU Selector
Selects the EIU providing information to the associated PFD and ND.
NAV Selector
Selects the FMC providing information to the associated PFD and ND. Selects the CDU providing information to the associated ND during standby navigation.

When a CDU is selected, the airplane symbol is at the respective IRS position.
FLT DIR Selector
Selects the flight control computer source of data for the command bars on the associated PFD.