Electronic assembly having sealing retainer coupling an electronic module and associated method

An electronic assembly comprising:

• a chassis having a plurality of electronic module mounting positions, each electronic module mounting position having a chassis cooling gas passageway;
• a respective electronic module received in each electronic module mounting position and having a module cooling gas passageway;
• a respective sealing retainer coupled between the chassis and each electronic module, the sealing retainer having a retainer cooling gas passageway therethrough aligned with the chassis cooling gas passageway and the module cooling gas passageway, the sealing retainer comprising
• a retainer body coupled to the chassis,
• a gas seal body coupled to the retainer body and movable relative to the retainer body between retracted and extended positions, the gas seal body in the retracted position permitting insertion and removal of the respective electronic module, and the gas seal body in the extended position extending outwardly from the retainer body to seal against the respective electronic module at the module cooling gas passageway, and
• a rotational drive member coupled to move the gas seal body between the retracted and extended positions;
• and
• a respective sealing gasket between each gas seal body and adjacent portions of the chassis.