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A DC10-10 was dispatched in non compliance with the fuel dump system inoperative but a deferred item on the dump system signed off and cleared as system operating normally.
| Attributes | |
| ACN | 452818 |
| Time | |
| Date | 199909 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 10 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance lead technician : 3 maintenance technician : 3 |
| ASRS Report | 452818 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : published procedure |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On sep/xa/99 I troubleshot a fuel dump system in reference to the taxi manual. I checked the system upon the aircraft arrival at ZZZ and both dump valve lights came on. I then closed the switch and they both went out. I proceeded to troubleshoot further and replaced a relay. I signed the system off. I am now being told that upon visual inspection of the aircraft while in 'C' check in los angeles after the aircraft was opened up, both dump valve connectors were found disconnected. When I left the aircraft, the system was operational. The logbook never stated that the plugs were removed. The plugs were reinstalled and the system operations check'ed we should be stating in the logbook that we removed plug and/or safety valves open or closed.
Original NASA ASRS Text
Title: A DC10-10 WAS DISPATCHED IN NON COMPLIANCE WITH THE FUEL DUMP SYS INOP BUT A DEFERRED ITEM ON THE DUMP SYS SIGNED OFF AND CLRED AS SYS OPERATING NORMALLY.
Narrative: ON SEP/XA/99 I TROUBLESHOT A FUEL DUMP SYS IN REF TO THE TAXI MANUAL. I CHKED THE SYS UPON THE ACFT ARR AT ZZZ AND BOTH DUMP VALVE LIGHTS CAME ON. I THEN CLOSED THE SWITCH AND THEY BOTH WENT OUT. I PROCEEDED TO TROUBLESHOOT FURTHER AND REPLACED A RELAY. I SIGNED THE SYS OFF. I AM NOW BEING TOLD THAT UPON VISUAL INSPECTION OF THE ACFT WHILE IN 'C' CHK IN LOS ANGELES AFTER THE ACFT WAS OPENED UP, BOTH DUMP VALVE CONNECTORS WERE FOUND DISCONNECTED. WHEN I LEFT THE ACFT, THE SYS WAS OPERATIONAL. THE LOGBOOK NEVER STATED THAT THE PLUGS WERE REMOVED. THE PLUGS WERE REINSTALLED AND THE SYS OPS CHK'ED WE SHOULD BE STATING IN THE LOGBOOK THAT WE REMOVED PLUG AND/OR SAFETY VALVES OPEN OR CLOSED.
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.