What was found
ON DESCENT THRU 17,000FT, RECEIVED A FLOW LIGHT WITH CABIN PRESSURE CLIMBING. FOLLOWED QRH PROCEDURE, NO HELP. DESCENDED TO 10,000 FT DUE TO LOSS OF BOTH LT AND RT PACKS. THE CABIN PRESSURE REMAINED WITHIN RANGE AND THE MASKS DID NOT DEPLOY. MX R & R PRESSURE SUPPLY INDICATOR AND AUGMENTATION VALVE FILTER ELEMENT AS A PRECAUTION. OPS CHECKED GOOD. ACFT OK FOR SERVICE.