Which rule is NOT included in the basic guidelines for handling an airborne emergency?

The guideline that is not included in the basic rules for handling an airborne emergency is turning, climbing, and cleaning. The primary focus during an airborne emergency typically revolves around maintaining control of the aircraft, analyzing the situation to assess potential actions, and landing safely as soon as conditions allow. These core principles emphasize immediate and effective management of the emergency, ensuring the aircraft remains stable and directing actions toward safety.

While turning and climbing can be necessary responses in specific situations, they do not represent a general rule applicable to all airborne emergencies. The term "clean" may refer to configuring the aircraft, but it is not a standard part of emergency protocol. Therefore, option D does not align with the critical, overarching rules that guide pilots during an emergency, which are focused on control, assessment, and landing.