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A B757 was dispatched in non compliance with incorrect hydraulic checks accomplished in conflict with the MEL requirements.
| Attributes | |
| ACN | 463080 |
| Time | |
| Date | 200002 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 10000 flight time type : 2200 |
| ASRS Report | 463080 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : repair performance deficiency : installation |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance Flight Crew Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft had a maintenance item which required a flight control check using center electric hydraulic pumps. Procedure did not clearly indicate procedures. The maintenance coordinator was consulted after a check of the flight controls prior to taxi. Revealed an additional status message. This revealed a problem with the power xfer unit. Maintenance informed that their interpretation was that the check was to be performed without the engines running. When we did so the check was normal.
Original NASA ASRS Text
Title: A B757 WAS DISPATCHED IN NON COMPLIANCE WITH INCORRECT HYD CHKS ACCOMPLISHED IN CONFLICT WITH THE MEL REQUIREMENTS.
Narrative: ACFT HAD A MAINT ITEM WHICH REQUIRED A FLT CTL CHK USING CTR ELECTRIC HYD PUMPS. PROC DID NOT CLRLY INDICATE PROCS. THE MAINT COORDINATOR WAS CONSULTED AFTER A CHK OF THE FLT CTLS PRIOR TO TAXI. REVEALED AN ADDITIONAL STATUS MESSAGE. THIS REVEALED A PROB WITH THE PWR XFER UNIT. MAINT INFORMED THAT THEIR INTERP WAS THAT THE CHK WAS TO BE PERFORMED WITHOUT THE ENGS RUNNING. WHEN WE DID SO THE CHK WAS NORMAL.
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.