Can the A340-300 with Honeywell FMS 2 legally fly this procedure if it is in the aircraft's Nav DB?
The requirements are clearly stated on the plate. Are you RNP 1 approved - YES. Do you have this particular SID in the box- YES. Is your aircraft airworthy-YES. So you're good to GO. Decision making in aviation isn't based on ballot principle but on hard core data. It's HKG, not FAA or ICAO or CASA. If not sure just don't do it.
