Final answer:
The recommended procedure for crossing a mountain range with suspected wave conditions includes confirming wave presence, staying windward, maintaining sufficient altitude, preparing for turbulence and downdrafts, monitoring aircraft performance closely, and considering alternate routes or waiting if necessary for safety.
Step-by-step explanation:
The recommended flight procedure for crossing a mountain range if a wave condition is suspected involves several key strategies for ensuring safety and successful navigation. Pilots should first gather forecast data and pilot reports to confirm the presence and strength of mountain waves. If mountain waves are indeed present, pilots should remain on the windward side of the mountain where updrafts are likely, ensuring they have sufficient altitude to clear the highest terrain.
Additionally, it's important to anticipate severe turbulence and potential downdrafts on the leeward side of the range and plan for increased fuel consumption due to potential headwinds. Aircraft should be operated within their performance limits, and attention should be paid to airspeed, altitude, and the aircraft's position relative to the terrain. In extreme conditions, where safety cannot be guaranteed, pilots should consider alternate routes or waiting for conditions to improve.