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An airbus A300 captain questions the maintenance placard for the blue hydraulic system overhead low pressure indication. Maintenance found and replaced a broken pressure switch near the blue hydraulic system pump.
| Attributes | |
| ACN | 767535 |
| Time | |
| Date | 200712 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 767535 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : non compliance with mel non adherence : published procedure non adherence : far other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : briefing performance deficiency : logbook entry performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Picked up aircraft in ZZZ1. The blue hydraulic system pressure indication was on placard in the logbook. Maintenance had placarded the overhead low pressure light. This was done in ZZZ2. MEL states that if the overhead low pressure light is inoperative; ECAM indications need to be operational. Sitting at the gate with '0' psi blue hydraulic pressure; ECAM showed green on the blue hydraulic system and not the amber 'lo;' that is the normal indication. This was not a light problem; as stated on the placard -- this was a low pressure switch problem. Called maintenance and questioned the placard; maintenance found a broken hydraulic low pressure switch in the blue system. The switch was physically broken in 2 pieces. Maintenance in ZZZ2 had placarded the symptom; not the cause of the problem.
Original NASA ASRS Text
Title: AN AIRBUS A300 CAPTAIN QUESTIONS THE MAINT PLACARD FOR THE BLUE HYD SYSTEM OVERHEAD LOW PRESSURE INDICATION. MAINT FOUND AND REPLACED A BROKEN PRESSURE SWITCH NEAR THE BLUE HYD SYS PUMP.
Narrative: PICKED UP ACFT IN ZZZ1. THE BLUE HYD SYS PRESSURE INDICATION WAS ON PLACARD IN THE LOGBOOK. MAINT HAD PLACARDED THE OVERHEAD LOW PRESSURE LIGHT. THIS WAS DONE IN ZZZ2. MEL STATES THAT IF THE OVERHEAD LOW PRESSURE LIGHT IS INOP; ECAM INDICATIONS NEED TO BE OPERATIONAL. SITTING AT THE GATE WITH '0' PSI BLUE HYD PRESSURE; ECAM SHOWED GREEN ON THE BLUE HYD SYS AND NOT THE AMBER 'LO;' THAT IS THE NORMAL INDICATION. THIS WAS NOT A LIGHT PROB; AS STATED ON THE PLACARD -- THIS WAS A LOW PRESSURE SWITCH PROB. CALLED MAINT AND QUESTIONED THE PLACARD; MAINT FOUND A BROKEN HYD LOW PRESSURE SWITCH IN THE BLUE SYS. THE SWITCH WAS PHYSICALLY BROKEN IN 2 PIECES. MAINT IN ZZZ2 HAD PLACARDED THE SYMPTOM; NOT THE CAUSE OF THE PROB.
Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.