• SEL SPD Flag: Notes:

  When the MCP selected target airspeed is invalid, an amber SEL SPD message shows above the Mach Airspeed Indicator MASI.

  
  
  Select Speed Flag Possible Causes:

  Before replacing any component perform BITE if available. (DFCS/Fault Review/Fault History) (DFCS/Extended Maintenance/MCP/Channel)

  
  

  1.Flight Control Computer (FCC)

  
  

  2.Mode Control Panel (MCP)

  
  

  3.Wiring

  
  

  If the SEL SPD flag shows on one side only, replace the on-side FCC.

  
  

  Replace the MCP if the SEL SPD flag appears on both the Captain and F/O airspeed indicator.

  
  
  SEL SPD Flag:

  

  
  

  

  
  Circuit Breakers:

  AFCS SYS A FCC (DC): P18-1 = D2.

  AFCS SYS B FCC (DC): P6-2 = B3.

  AFCS MCP DC1: P18-1 = D5.

  AFCS MCP DC2: P6-2 = C3.

  DEU#1 HOLD UP: P6-1 = D10.

  DEU#1 PRIMARY: P18-2 = D5.

  DEU#2 HOLD UP: P6-1 = D9.

  DEU#2 PRIMARY: P6-1 = D11.

  
  
  Applicable deferrals None

Training Only