|Quoting A319XFW (Reply 2):|
Quoting Henny (Thread starter):
I can't really answer you question, but I don't think it's exclusively.
For instance NW still gets some analogue instruments in the cockpit even though newer digital ones are available. This is most likely due to spares commonality, so they don't have 2 different items to stock for one fleet.
The same goes for the PTU which as standard (Frisbee [sic]) one type is being fitted, whereas the other manufacturers (Eaton) is still available.
Minor modifications are introduced on Airbus from a certain embodiment point, however Airbus introduces larger modifications through aircraft (cabin) versions. So instead of just starting deliveries from a certain date, you start at the beginning of a new airline config/version until all versions have caught up, then its standard from that point on i.e. all pre-configs have been delivered and only new ones are coming along.
's (EIS-2) are optional, thus it's up to each airline to decide whether they want LCD
or not. Airbus wouldn't have had a choice in its method of introduction in this case, as most airlines nowadays want their batches of orders to be similar to the previous batch. The difference between CRT and LCD
is too great.