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A B757-200 was dispatched in non compliance with the incorrect pneumatic valve rendered inoperative on the right engine per the MEL.
| Attributes | |
| ACN | 569784 |
| Time | |
| Date | 200301 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : a80.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 5 |
| ASRS Report | 569784 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : fault isolation performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : testing performance deficiency : training |
| Supplementary | |
| Problem Areas | Chart Or Publication Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft X arrived at gate at XA20 with a low power setting. Approximately 65 pct N2, right engine produced only 4 psi duct pressure and was incapable of supplying right pack or right engine anti-ice. Replaced relay K10205 with no help. We had to dispatch the aircraft using MEL 36-11-02 which required to close hp valve and disconnected high stage electrical connector capped and stowed. Instead, we closed the prsov under MEL 36-11-01. After a brief discussion and troubleshooting, we realized that we used the wrong MEL. We contacted the coordinator and aircraft was rerted from WX.
Original NASA ASRS Text
Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT PNEUMATIC VALVE RENDERED INOP ON THE R ENG PER THE MEL.
Narrative: ACFT X ARRIVED AT GATE AT XA20 WITH A LOW PWR SETTING. APPROX 65 PCT N2, R ENG PRODUCED ONLY 4 PSI DUCT PRESSURE AND WAS INCAPABLE OF SUPPLYING R PACK OR R ENG ANTI-ICE. REPLACED RELAY K10205 WITH NO HELP. WE HAD TO DISPATCH THE ACFT USING MEL 36-11-02 WHICH REQUIRED TO CLOSE HP VALVE AND DISCONNECTED HIGH STAGE ELECTRICAL CONNECTOR CAPPED AND STOWED. INSTEAD, WE CLOSED THE PRSOV UNDER MEL 36-11-01. AFTER A BRIEF DISCUSSION AND TROUBLESHOOTING, WE REALIZED THAT WE USED THE WRONG MEL. WE CONTACTED THE COORDINATOR AND ACFT WAS RERTED FROM WX.
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.