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Improperly performed deferral procedure results in A319 returning to departure airport due to failure to pressurize.
| Attributes | |
| ACN | 812967 |
| Time | |
| Date | 200811 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzzz.airport |
| State Reference | FO |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : msy.tower |
| Operator | common carrier : air carrier |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 812967 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : unqualified personnel |
| Supplementary | |
| Problem Areas | Company Aircraft |
| Primary Problem | Company |
Narrative:
Fr (deferral procedure) was accomplished by contract maintenance at ZZZZ and entered into logbook. On takeoff aircraft would not pressurize. We received clearance to return to field and made a normal landing with aircraft being below maximum landing weight. MEL required maintenance to manually lock closed a vent valve and it turned out that after the fr was performed by the mechanic one of his helpers came along and returned the valve to what he thought was the correct position. One of the big problems here besides the mechanic not being familiar with the airbus was the language barrier. The fr was a rather long test; but I was satisfied with the work although; I could not communicate very well with the mechanic. The reason that the event happened was because his helper did unauthorized work and did it after the fr was accomplished and showed to be ok.
Original NASA ASRS Text
Title: IMPROPERLY PERFORMED DEFERRAL PROCEDURE RESULTS IN A319 RETURNING TO DEPARTURE AIRPORT DUE TO FAILURE TO PRESSURIZE.
Narrative: FR (DEFERRAL PROC) WAS ACCOMPLISHED BY CONTRACT MAINT AT ZZZZ AND ENTERED INTO LOGBOOK. ON TKOF ACFT WOULD NOT PRESSURIZE. WE RECEIVED CLRNC TO RETURN TO FIELD AND MADE A NORMAL LNDG WITH ACFT BEING BELOW MAX LNDG WT. MEL REQUIRED MAINT TO MANUALLY LOCK CLOSED A VENT VALVE AND IT TURNED OUT THAT AFTER THE FR WAS PERFORMED BY THE MECH ONE OF HIS HELPERS CAME ALONG AND RETURNED THE VALVE TO WHAT HE THOUGHT WAS THE CORRECT POS. ONE OF THE BIG PROBS HERE BESIDES THE MECH NOT BEING FAMILIAR WITH THE AIRBUS WAS THE LANGUAGE BARRIER. THE FR WAS A RATHER LONG TEST; BUT I WAS SATISFIED WITH THE WORK ALTHOUGH; I COULD NOT COMMUNICATE VERY WELL WITH THE MECH. THE REASON THAT THE EVENT HAPPENED WAS BECAUSE HIS HELPER DID UNAUTH WORK AND DID IT AFTER THE FR WAS ACCOMPLISHED AND SHOWED TO BE OK.
Data retrieved from NASA's ASRS site as of May 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.