What was found
THE CABIN DEPRESSURIZED RAPIDLY ACCOMPANIED BY A "LEFT SERVICE DOOR LIGHT" ON THE DOORS PANEL. TURNED OFF PACKS AND CONTINUED UNPRESSURIZED. LT SERVICE DOOR LT WENT OUT ON TAXI INTO GATE. LIGHT REMAINED OUT. REMOVED INNER DOOR LINER REF 52-14-011. OPENED LT SERVICE DOOR AND PERFORMED GVI, NO DEFECTS NOTED. REF MM 52-14-000 & 52-14-000-6. PERFORMED PRESSURE CONT SYS ADJ/TEST & SGL PACK PRESSURE INSPECTION CHECK REF MM 21-31-000-5 & ALL TEST PASS. UNABLE TO DUPLICATE DISCREPANCY OR LOCATE ANY ACFT SYS OR STRUCTURAL FAULTS. ACFT OK FOR SERVICE. CLOSED LT SERVICE DOOR & REINSTALLED INTERIOR GILL LINER. 52-14-000 & 011. REINSTALLED FWD CARGO AFT PIT WALL & LINER. FINAL CLOSED.