ASR SUPPORTS DSTL IN FINDING A SOLUTION FOR THEIR PRECONDITIONED AIR DUCTING REQUIREMENTS Posted on June 8, 2023June 19, 2024 by ASR Admin ASR has been working with DSTL to develop a Preconditioned Air (PCA) ducting system that meets specific operational demands, leading to the award of business to supply hose assemblies and connectors from J&B Aviation.