A320
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural Published Material / Policy
Aircraft Aircraft Damaged; General Maintenance Action
Procedure; Equipment / Tooling; Human Factors
I was coming off the high side of the nitrogen cart; not focused that it was 100 PSI increments. Thinking it was 10 PSI increments. Thus very over pressurizing the potable water system which resulted [in] aircraft damage.Stay focused on the task at hand. A pressure relief valve would be nice in system; but still no excuse.
Technician had the potable water system over-pressurized on an A320 causing damage to the aircraft.