Manual Start on GE CF6
The DDG for our 744's with GE CF6's states that if the engines do not start after manual start procedures (assuming autostart is not available) then a modified manual start procedure may be used - set the STBY IGNITION switch to 1 or 2 then perform a manual start the usual way. The RR variant does not contain this option and I was wondering why?
As I understand it, on both variants the position of the AUTO IGNITION switch determines that the EEC alternates igniters for each engine start (or each second start for GE's) therefore if the intention is to force the EEC to use the other igniters then why can this method not be used on the RB211?
Regards,
LH