B737 FQIS problem
Hi guys, I've got a snag with a B737-300 and maybe some of you avionic guys can help.
The No2 FQI throws up ERR 9 when ever the A/C is climbing, when its level or descending nothing happens, and can never be reproduced on the ground. Its had several indicators and swaps, bussing plug cleaned, wiring agitated etc to no avail.
Anyone got any theories or clues?