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A B757-200 was dispatched with the right electric hydraulic pump low pressure light inoperative. MEL did not state EICAS must be operational.
| Attributes | |
| ACN | 597141 |
| Time | |
| Date | 200310 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| 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 | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 597141 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : non compliance with mel non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other Other |
| Factors | |
| Maintenance | contributing factor : manuals performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Chart Or Publication |
Narrative:
Aircraft abcd arrived in ZZZ with an inbound log item for the r-hand electric pump low pressure light and EICAS advisory message being displayed. I had the crew confirm that this was strictly an indication problem, and the pump was verified to be putting out the correct pressure. I deferred the low pressure light per MEL 2931G, which only covered the low pressure light and not the EICAS message. After my error was discovered, the system was repaired the following day. I have contacted operational engineering to have them update the MEL to state that the EICAS message must be operational when the low pressure light is being deferred.
Original NASA ASRS Text
Title: A B757-200 WAS DISPATCHED WITH THE R ELECTRIC HYD PUMP LOW PRESSURE LIGHT INOP. MEL DID NOT STATE EICAS MUST BE OPERATIONAL.
Narrative: ACFT ABCD ARRIVED IN ZZZ WITH AN INBOUND LOG ITEM FOR THE R-HAND ELECTRIC PUMP LOW PRESSURE LIGHT AND EICAS ADVISORY MESSAGE BEING DISPLAYED. I HAD THE CREW CONFIRM THAT THIS WAS STRICTLY AN INDICATION PROB, AND THE PUMP WAS VERIFIED TO BE PUTTING OUT THE CORRECT PRESSURE. I DEFERRED THE LOW PRESSURE LIGHT PER MEL 2931G, WHICH ONLY COVERED THE LOW PRESSURE LIGHT AND NOT THE EICAS MESSAGE. AFTER MY ERROR WAS DISCOVERED, THE SYS WAS REPAIRED THE FOLLOWING DAY. I HAVE CONTACTED OPERATIONAL ENGINEERING TO HAVE THEM UPDATE THE MEL TO STATE THAT THE EICAS MESSAGE MUST BE OPERATIONAL WHEN THE LOW PRESSURE LIGHT IS BEING DEFERRED.
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.