An IFR departure into forecast icing in an airplane placarded for non-icing operations only
It's Friday afternoon, April 12, 2024, at McGhee Tyson (TYS) in Knoxville. You're headed home to Grand Rapids (GRR) in your Piper PA-32R-301, IFR, as filed.
You filed through ForeFlight. The briefing came back with icing along the route.
The flight manual limits this airplane to non-icing operations only, with a placard in your view. It carries no anti-ice or de-ice equipment.
Wind 280° at 13 gusting 24, ten miles in light rain, scattered 5,000, broken 6,500, overcast 7,500. The ATIS carries a low-level wind shear advisory. You're cleared to GRR as filed. The engine is running.
You're cleared IFR into a layer forecast for icing, in an airplane placarded against it. What do you do?