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A line mechanic reports a hydraulic system accumulator bladder test performed during during an a-check revealed internal leaking of an system accumulator. Three replacement hydraulic accumulators from the same vendor repair station were rejected; even though they were signed-off FAA-8130 serviceable tags; before a serviceable accumulator was actually found.
| Attributes | |
| ACN | 934664 |
| Time | |
| Date | 201102 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Hydraulic Main System |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
An A320 aircraft took three accumulators from same repair vendor to fix [a failed accumulator]. Two accumulators where bench tested before installation and leaked. Air came out fluid side [of accumulator] instantly. And vendor said they were bench tested [at repair station]. There is no way possible from the leaks we had; that the vendor checked these after rebuild. The first accumulator that was put on aircraft on midnight shift filled the hydraulic side of the aircraft causing three hours of bleeding [time] to clear out nitrogen. Took pictures of accumulator blowing glove off the fluid ends of accumulators for proof that this is really a vendor problem of pencil whipping parts.
Original NASA ASRS Text
Title: A Line Mechanic reports a hydraulic system accumulator bladder test performed during during an A-Check revealed internal leaking of an system accumulator. Three replacement hydraulic accumulators from the same vendor repair station were rejected; even though they were signed-off FAA-8130 serviceable tags; before a serviceable accumulator was actually found.
Narrative: An A320 aircraft took three accumulators from same repair vendor to fix [a failed accumulator]. Two accumulators where bench tested before installation and leaked. Air came out fluid side [of accumulator] instantly. And Vendor said they were bench tested [at repair station]. There is no way possible from the leaks we had; that the vendor checked these after rebuild. The first accumulator that was put on aircraft on midnight shift filled the hydraulic side of the aircraft causing three hours of bleeding [time] to clear out nitrogen. Took pictures of accumulator blowing glove off the fluid ends of accumulators for proof that this is really a vendor problem of pencil whipping parts.
Data retrieved from NASA's ASRS site as of April 2012 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.