RB211 FAFC Ignitor Selection (744)
I've been trying to figure this out for a few days now.
My notes tell me that the ignitors alternate after each "ground start" and that the ADC provides the air-ground signal. However, I can find no links between the PSEU and the ADC which would tell the ADC that it was on the ground.
The only air/ground signal that the ADC's seem to get is during a CMC test (and that requires the CMC Ground Test Switch to be on)... shown as "FT" on the schematics.
Anyone have a better knowledge of this selection process?
Thanks.
Cheers.
NSEU