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An A321 was dispatched with the yellow hydraulic system pressure reported low. Item deferred in conflict with the MEL. Must have full pressure from engine driven pump.
| Attributes | |
| ACN | 689705 |
| Time | |
| Date | 200603 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A321 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : flight engineer |
| Experience | flight time last 90 days : 150 flight time total : 14000 flight time type : 1300 |
| ASRS Report | 689705 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 350 flight time total : 20000 flight time type : 3500 |
| ASRS Report | 690029 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : yellow hyd press indicator other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : repair performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Flight Crew Human Performance Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft dispatched with MEL (yellow ECAM system low pressure). Flight crew conducted operations procedure in accordance with MEL requirements. On taxi out before takeoff; cockpit indications were somewhat confusing. Captain called dispatch and maintenance foreman for clarification in accordance with fom requirements. Concluded after conversation with dispatch and maintenance that aircraft safety was not compromised if we departed with yellow hydraulic pump on with all system normal. Directed by maintenance to write up discrepancy again upon arrival in ZZZ1. Subsequent to flight; flight crew learned that maintenance may have mislabeled the actual irregular condition affecting aircraft.
Original NASA ASRS Text
Title: AN A321 WAS DISPATCHED WITH THE YELLOW HYD SYS PRESSURE RPTED LOW. ITEM DEFERRED IN CONFLICT WITH THE MEL. MUST HAVE FULL PRESSURE FROM ENG DRIVEN PUMP.
Narrative: ACFT DISPATCHED WITH MEL (YELLOW ECAM SYS LOW PRESSURE). FLT CREW CONDUCTED OPS PROC IN ACCORDANCE WITH MEL REQUIREMENTS. ON TAXI OUT BEFORE TKOF; COCKPIT INDICATIONS WERE SOMEWHAT CONFUSING. CAPT CALLED DISPATCH AND MAINT FOREMAN FOR CLARIFICATION IN ACCORDANCE WITH FOM REQUIREMENTS. CONCLUDED AFTER CONVERSATION WITH DISPATCH AND MAINT THAT ACFT SAFETY WAS NOT COMPROMISED IF WE DEPARTED WITH YELLOW HYD PUMP ON WITH ALL SYS NORMAL. DIRECTED BY MAINT TO WRITE UP DISCREPANCY AGAIN UPON ARR IN ZZZ1. SUBSEQUENT TO FLT; FLT CREW LEARNED THAT MAINT MAY HAVE MISLABELED THE ACTUAL IRREGULAR CONDITION AFFECTING ACFT.
Data retrieved from NASA's ASRS site as of January 2009 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.