Which control allows routing bleed air from the good engine to both wings for wing anti-ice after engine failure?

• A. Wing anti-ice cross-bleed selector knob
• B. ENG FUEL switch
• C. Landing gear lever
• D. Cabin air switch

Answer: (A)

Bleed-air routing for wing anti-ice when an engine fails relies on cross-bleed capability that lets air from the operating engine feed the anti-ice systems on both wings. The wing anti-ice cross-bleed selector knob is the control used to engage this path, directing bleed air from the good engine through cross-bleed lines to supply anti-ice ducts on both wings. This ensures both wings stay protected from ice even with one engine inoperative. The other controls don’t manage bleed air or wing anti-ice—engine fuel affects fuel flow, the landing gear lever controls gear, and the cabin air switch handles the cabin environment.