Why PCA Unit is needed when AGPU is already there?Another important question is why the aircraft does not use the power of the AGPU to run the air conditioning system when the aircraft ground power unit (AGPU) is already connected to the aircraft. Why is there a separate machine, the Preconditioned

(PCA) Pre-Conditioned Air Hose Joint TJ793:Investing in a PCA system for your airport will increase your revenue, reduce your environmental impact and attract airlines by reducing your own costsWhether on warm or sunny days, or in cold ambient conditions, air conditioning must be used during transfe

The aircraft will use air conditioners to control the temperature, so that the temperature in the cabin will not be particularly low; and the rocket needs to pass through the same height safely.