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An MD88 technician working off-line reports installing an incorrect right pack regulator valve. Error found when part number entered in home station computer.
| Attributes | |
| ACN | 623039 |
| Time | |
| Date | 200407 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Qualification | technician : airframe technician : fcc technician : powerplant |
| Experience | maintenance avionics : 12 maintenance technician : 17 |
| ASRS Report | 623039 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was sent from ZZZ1 to work the right pack system on an aircraft on the ground in ZZZ (road trip). During the troubleshooting and replacement of the regulator valve for the right pack system, the wrong part number was installed in its place. The parts look the same, however they have different part numbers. This problem was not discovered until the following night when we tried to ship the part back to ZZZ2 and the different part number was noticed in the computer. However, this difference in part number would have been noticed sooner, and not caused a problem if it were not for being an out of town trip.
Original NASA ASRS Text
Title: AN MD88 TECHNICIAN WORKING OFF-LINE RPTS INSTALLING AN INCORRECT R PACK REGULATOR VALVE. ERROR FOUND WHEN PART NUMBER ENTERED IN HOME STATION COMPUTER.
Narrative: I WAS SENT FROM ZZZ1 TO WORK THE R PACK SYS ON AN ACFT ON THE GND IN ZZZ (ROAD TRIP). DURING THE TROUBLESHOOTING AND REPLACEMENT OF THE REGULATOR VALVE FOR THE R PACK SYS, THE WRONG PART NUMBER WAS INSTALLED IN ITS PLACE. THE PARTS LOOK THE SAME, HOWEVER THEY HAVE DIFFERENT PART NUMBERS. THIS PROB WAS NOT DISCOVERED UNTIL THE FOLLOWING NIGHT WHEN WE TRIED TO SHIP THE PART BACK TO ZZZ2 AND THE DIFFERENT PART NUMBER WAS NOTICED IN THE COMPUTER. HOWEVER, THIS DIFFERENCE IN PART NUMBER WOULD HAVE BEEN NOTICED SOONER, AND NOT CAUSED A PROB IF IT WERE NOT FOR BEING AN OUT OF TOWN TRIP.
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.