Hi Penko
You are right. Airbus has made conditional change for sequencing the destination. The latest one has the following:
Note: 1. When the aircraft overflies a flight plan discontinuity, the NAV mode automatically reverts
to the HDG (TRK) mode.
2. In HDG/TRK mode, a waypoint is sequenced when it passes behind the aircraft, and the
aircraft is less than 5 NM from it. In addition, when the waypoint is the Destination Airport
(DEST), the sequencing is inhibited, unless the following conditions are fulfilled within the
3 s following the general rules fulfilment:
‐ The cross-track is less than 0.5 NM
‐ The difference between the track of the aircraft and the track of the leg is less than
30 °.
The same conditions apply in NAV mode, except that no distance to the waypoint is
taken into account.
EARLIER FCOM was as follows:
Note: 1. When the aircraft overflies a flight plan discontinuity, the NAV mode automatically reverts
to the HDG (TRK) mode.
2. In HDG/TRK mode, a waypoint is sequenced when it passes behind the aircraft, and the
aircraft is less than 7 nm from it, and also when the difference between the track of the
aircraft and the track of the leg is less than 90 °.
If the aircraft is flying a discontinuity towards a waypoint, this waypoint is sequenced
when the aircraft is less than 5 nm from it.
The same conditions apply in NAV mode, except that no distance to the waypoint is
taken into account