Hello Peter, try making an official request to Hendon to see AP 114P-0200, 0300 and 0801 (ASV 21 in various incarnations) series. The AP’s got renumbered into the modern series, I can’t garuntee that they’ll be there but its the most up to date reference for the equipment, you may have more luck than with AP2890G – The answer was lying in AP113 Book 4, for anybody that’s developing an interest in AP’s… 😉