A320 double values on pitch trim scale

[pensador]

Hi! What do the double values at the end of the trim wheel green band (10.5/17 and 40/43 for A320)

[Wingswinger]

I'll hazard a guess without looking it up:

One is the MAC at ZFW limit (10.5/43), the other is the MAC at TOW limit (17/40).

[pensador]

Wingswinger, you are brave! Unfortunately, not.

[zonnair]

The setting for T/O must be between 17 and 40 (= green band).

Below 17 (= between 10.5 and 17) will be set to 17 hence the value 10,5/17.
Above 40 (= between 40 and 43) will be set to 40 hence the value 40/43.

regards

[pensador]

Thank you, zonnair! How did you know?