B747 Classic - Standby Ignition vs Captns Hdg info.
Hi Guys,. .I've been searching around for some time regarding this query -. .Why is it, on the Classic B747, powered by the P&W engines, when the Stby Ign. is selected by the FE, the Captn. loses all his heading info, BUT, on the RR powered ones, he does not?. .Thanks for any info! <img src="confused.gif" border="0">