Alternate EFI - Both

EFI (Electronic Flight Instruments) Switch

• Normal:

  • Left EFIS SG supplies Captain's EADI and EHSI
  • Right EFIS SG supplies First Officer's EADI and EHSI
  • Centre EFIS SG is available as the alternate source
  
  
• ALTN - Centre EFIS SG supplies associated ADI and HSI

INSTRUMENT SWITCH

• Both EFI switches are in the ALTN position
• Both ADIs and HSIs are displaying information from the Centre SG. Captain has display control.