523/524 BCP fail DT check ~~~~~ 523/524 BCP fail during DT check. To rectify.     Check an found ACU exhaust port air purging when at coast position.C/O and function test ok.BCP within criteria. ACU:- Old s/n: 1107038 New s/n: 1249046 Not: 2480988 Done by Sanip/Koh/Rizman.  18/04/23