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An aircraft inspector reports hydraulic flight control components are being tested with auxiliary pumps supplying 3000 psi and 6 gals per min flow volume. Should be tested using hydraulic cart 3000 psi and 40 gals per min flow volume.
| Attributes | |
| ACN | 411648 |
| Time | |
| Date | 199808 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | other other |
| Flight Plan | None |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30F |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 411648 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other oversight : supervisor |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Performing hydraulic leak check on flight controls with auxiliary pumps supplying only 6 gals per min, when controls should be operated with an external hydraulic source capable of supplying 40 gals per min at 3000 psi. This is a pressure versus volume issue that is not understood by our mgrs, on DC10- 30 and MD11 aircraft.
Original NASA ASRS Text
Title: AN ACFT INSPECTOR RPTS HYD FLT CTL COMPONENTS ARE BEING TESTED WITH AUX PUMPS SUPPLYING 3000 PSI AND 6 GALS PER MIN FLOW VOLUME. SHOULD BE TESTED USING HYD CART 3000 PSI AND 40 GALS PER MIN FLOW VOLUME.
Narrative: PERFORMING HYD LEAK CHK ON FLT CTLS WITH AUX PUMPS SUPPLYING ONLY 6 GALS PER MIN, WHEN CTLS SHOULD BE OPERATED WITH AN EXTERNAL HYD SOURCE CAPABLE OF SUPPLYING 40 GALS PER MIN AT 3000 PSI. THIS IS A PRESSURE VERSUS VOLUME ISSUE THAT IS NOT UNDERSTOOD BY OUR MGRS, ON DC10- 30 AND MD11 ACFT.
Data retrieved from NASA's ASRS site as of July 2007 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.