TAKEOFF REF Uplink and Bleed Configuration

[Mariano]

Hi, Everybody,

Question for operators who use the TAKEOFF REF uplink option on the NG FMC (or 757/767 Pegasus, 777, etc.).

How does the system (Dispatch) communicate to the flight crew that a packs off, one pack-to-APU, nacelle anti-ice, etc. is integral to the calculated data, and that the crew must configure these systems accordingly in order to obtain the calculated performance out of the aircraft?

Is a separate ACARS message sent informing the crew of required pack/bleed and nacelle anti-ice configuration?

Thank you,

Mariano

[DougSnow]

In our system at work, the crew sends their desired configuration of bleeds flaps and so on. If the returned configuration is different to lift the weight (need a different flaps and so on), we add it to a free text remark called "Restrictions" which is the first briefing item on the crew's performance brief...

What I do as a DX to the flight plan is irrelevant.

[Mariano]

Thank you.

Best regards,

Mariano