What was found
SHIP 3923 - PRES - DECLARED AN EMERGENCY IN TO LAS FOR LOSS OF PRESSURIZATION. MASKS DID NOT DEPLOY. CORRECTIVE ACTION: PERFORMED CPC 1-2 BITE CHECKS, BOTH CONTROLLERS SHOW FAULT 17 (NOT USED). PERFORMED ODI NO-GO ATA 2131 AUTO PRESSURE CONTROL. NTF. PRESSURIZED AIRCRAFT TO 8.2 DIFFERENTIAL (PSI) NO DEFECTS FOUND. NO MISSING PANELS. PERFORMED SINGLE PACK CONFIDENCE CHECKS. NTF. REPLACED DCPC-1, PRESS CONTROL PANEL AND OUTFLOW VALVE PRECAUTIONARY. ALL OPS CHECKS GOOD. AIRCRAFT RTS. (5971178).