The Bureau of Air Safety Investigation recommends that airline
operators within the Asia-Pacific region:
Review their procedures with regard to mode selection and
consider:
(a) if flight crews should state intended mode selection during all
flight crew briefings;
(b) if flight crews should announce and acknowledge all mode
changes during flight;
(c) refresher training regarding mode mechanics and mode usage on a
regular basis; and
(d) clear and consistent guidelines regarding mode usage.