IAS always showing 115 knots

[excribo]

My TBM 900 is always showing 115 on the backup display, as well as on the main panel. The groundspeed on the middle panel works fine.

I'm on 11.50b

[Goran_M]

Did you check the maintenance manager for any repairs needed to the static system?  Did you leave a cover/covers on the 2 backup static vents on the rear of the aircraft?

The TBM900_log.txt file will reveal all.  But before posting that, make sure all covers are removed and any repairs needed are carried out.