3669 AIR DRYER ABNORMAL PURGING. MR UNAB ~~~~~ 3669 AIR DRYER ABNORMAL PURGING. MR U BLE TO CHARGE.  3669 air dryer found faulty - replaced. Security/function check - OK. Performed pneumatic system check. (See attached checklist for results.) #3669 Air Dryer S/N :    OLD : 3514450241 NEW : 015-14039  Alan/Lee PT/Anand/Shafie/Sugu 44998