When does the pneumatic canopy pressure seal inflate if bleed air inflow is available?

The pneumatic canopy pressure seal is designed to inflate when bleed air inflow is available and certain conditions regarding the aircraft's weight distribution are met. Specifically, when the weight is off of the right main landing gear, it indicates that the aircraft is in a position that allows for a potential change in internal cabin pressure or a readiness to prepare the canopy for sealing. This condition is critical because if the right landing gear is lifted (for instance, during takeoff or when transitioning from a taxi position), the systems are primed to seal the canopy against the external environment, allowing for better pressure maintenance and protecting the cockpit from atmospheric changes.

In this instance, since the correct answer pertains to the situation when weight is off the right main landing gear, it indicates that the system is actively engaging to inflate the pneumatic seal for operational readiness. This is an essential function in maintaining the integrity of the cockpit environment during flight operations.