I have come across a problem in relation to a departure sequence.
Firstly the details of the departure.
Departing YPPH for YANG, the AVNEX2 departure out of YPPH via RWY 06, the filed route being AVNEX-ESDEG-TEANO-GOKUP at FL310.
Now the following has happened on more than one occasion, twice in a row for this particular route, and for another route bound for YBAS out of YPPH
using a different SID.
What happens is once airborne, the aircraft tracks via the planned departure when nav mode selected, but as soon as the transition happens from the
first outbound point to the next, in this case transitioning to MIDLA, the flightplan drops out from the ND and MCDU leaving just the last waypoint in the
flightplan, being GOKUP.
You basically have to re input the whole flightplan,
What i found interesting is when i did re input the flightplan including the SID, between two particular waypoints of the SID, being AVPES and HARBY,
the magenta line on the ND would oscillate back and forth between the normal curved line in the turn and a 90 degree magenta line, and the aircraft would
swing wildy left and right until eventually the flightplan dropped off the ND and MCDU again.
I have attached a couple of images, hopefully they came through, showing the 90 degree magenta line and the eventual dropping off of the flightplan.
Other than the above, the aircraft is a dream to fly.
Thanks for your time.