Beechcraft 35 Bonanza — Advisory Circular

This document is an advisory circular (AC 91-74B) issued by the U.S. Department of Transportation, Federal Aviation Administration, providing guidance for pilots regarding flight in icing conditions. It serves as a reference for understanding the atmospheric conditions associated with icing, the effects of icing on aircraft, and operational procedures to ensure safety during such conditions. The document consolidates and updates previous advisories, emphasizing the importance of recognizing and avoiding icing conditions, as well as the proper use of deicing and anti-icing systems. It is crucial for pilots of all fixed-wing aircraft, including those not specifically certificated for icing operations, to be aware of the risks and recommended practices outlined in this circular.

• Icing can occur in supercooled clouds at temperatures below 0 °C (32 °F).
• Pilots must ensure their aircraft is certificated for flight in icing conditions before operating in such environments.
• Deicing and anti-icing systems should be activated at the first sign of ice accumulation.
• Flight planning should include monitoring weather for potential icing conditions and adjusting routes accordingly.
• Immediate exit from icing conditions is critical to maintain safety.