ASFKAP,
Very kind of you, have noted same with thanks. Now youve jogged my memory Im also wondering if the 'APU Gen off Bus' annunciator has part of its signal origins there also. I seem to remember an APU speed of 98% ? criteria for this light on the Elect Sytems panel on P5.
Anyway, I remain grateful for you taking the time to reply. Yours in fading memories. IFI