A320
Maintenance Airframe; Maintenance Powerplant
Human-Machine Interface; Training / Qualification; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Human Factors; Procedure; Aircraft
Aircraft upon arrival at ZZZ for scheduled A check. Found the crew O2 bottle shut off valve safety wired backwards. Safety wire as installed; would not resist the valve from turning towards the closed position.
Technician reported discovering during a scheduled A check; that the crew oxygen bottle had the valve safety wired backwards and made repairs.