I think what Plas Teek waz getting at is that the other 1900D's have it as STANDARD, ie part of the ship.
So built in as the aircraft was being put together.
I heard somewhere that bits of the A/P are still in the 1900D's that Eag have.
Retro Fitting was discused at high level within Air NZ but was decided a no go.
Probably to save face on the dips#$t that made the origional desision!
Curious to know just how often the bog gets used on their sectors??