How many PCA receptacles are available on both the 787 and 777 aircraft?

Both the Boeing 787 and the Boeing 777 aircraft are equipped with two PCA (Pre-Conditioned Air) receptacles. These receptacles are essential for connecting ground power units that supply conditioned air to the aircraft, particularly during boarding and deplaning when the engines are off and the aircraft is parked at the gate. The PCA systems help maintain a comfortable temperature inside the cabin and assist in reducing the overall environmental impact during ground operations. Understanding the configuration of PCA receptacles is crucial for fleet service teams, as it influences ground operations and passenger comfort.