What was found
DISCREPANCY: REFERENCE LP194685 ITEM 1, FLIGHT # 2586: AIR CREW REPORTS: LOSS OF CABIN PRESSURIZATION. CORRECTIVE ACTION: REMOVED AND REPLACED OUTFLOW VALVE IAW AMM 21-31-51-400-001-A. PERFORMED OPS TEST OF MANUAL MODE FOR OUTFLOW VALVE POSITION INDICATOR IAW AMM 21-31-00-710-003-A. PERFORMED OPS TEST OF PRESS. CTL. AND MONITORING IAW AMM 21-31-00-710-002-A, PERFORMED PRESSURIZATION TEST IAW AMM 05-53-00-780-00-A01. NO FAULTS NOTED, A/C OK FOR SERVICE. T.W. F4930, CDD-11NOV22. GUIDANCE AMM 21-31-51-400-001-A.