SafetyConcerns, you asked:
I have just tripped the A330 autopilot manually to off. Do I get a warning?
If yes acars will transmit it, if no acars cant transmit nothing?
On the A320 (and A330/340 will be idem), you will always get
- a flashing MASTER WARNING light
- a red message on the ECAM
- an audio alert (cavalry charge)
irrespective of whether you disengage the autopilot manually or not.
If you disconnect the AP in the nominal way, i.e. via the TAKE OVER PB on the side stick, the warnings are temporary, of shorter minimum duration and can be completely cleared e.g. by a 2nd push on the TAKE OVER PB. On the ECAM, you will get a simple "AP OFF", and no ECAM status message.
In any other case, irrespective of whether the AP disengagement results from other crew action (such as sidestick deflection beyond a certain limit, or using the AP pushbuttons on the FCU for a disconnect) or a failure/exceeded engagement conditions, warnings will be continuous and you will get "AUTO FLIGHT AP OFF" on the ECAM and a status message.
Hope I got that sufficiently correct and clear ;-)
I would suspect that transmitting the manual AP off condition via ACARS is one of the myriad customer options.