B737 EFIS instrument questions
 

Helllo,

1.what ADC or IRS source if any provides data for the EADI Ground speed display, mach number???

2. Are the ADC and IRS tied in together, or are they seperate units???

thank you DW.

What series 737 are we talking about here? ;) Classic? New Generation?

1. ADC-1 to captain's instruments, ADC-2 to FO's.

2. separate units I believe.

EFIS ie 3/4/5

That would be classic then. Classics are available with and without EFIS, therefore that term is somewhat muddled. The NG is only available with an EFIS, which further confuses things.

On the classics the groundspeed readout on the PFD comes from the FMC or IRS with the FMC being the primary source. The mach number comes from the respective air data computer.

The ADCs and IRS units are separate units in the classic models.

If the 3/4/5 is Classic, what do you call the 1/2?

That would be : Jurasic

LoL..:}

as far as I know 1/2 is 'original'