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A saab 340A had a trim control panel replaced for a discrepancy found by a mechanic on a scheduled check and 6 days later the panel was replaced again due to a pitch trim switch installed incorrectly.
| Attributes | |
| ACN | 419372 |
| Time | |
| Date | 199811 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : zzz airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340A |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 419372 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
During a scheduled line check, I noted a discrepancy that the yaw trim would not move to the right. I replaced the whole panel. This was on nov/xa/98. On nov/af/98 a discrepancy was made that the standby pitch trim switch was moving incorrectly to position selected. The standby pitch switch was replaced and the aircraft left with a slight delay. My only contributing factor is that it took 6 days and another scheduled (and completed) line check before the discrepancy was found by a pilot. Parts need to be inspected better or more carefully before being tagged, to prevent parts being bad from stock.
Original NASA ASRS Text
Title: A SAAB 340A HAD A TRIM CTL PANEL REPLACED FOR A DISCREPANCY FOUND BY A MECH ON A SCHEDULED CHK AND 6 DAYS LATER THE PANEL WAS REPLACED AGAIN DUE TO A PITCH TRIM SWITCH INSTALLED INCORRECTLY.
Narrative: DURING A SCHEDULED LINE CHK, I NOTED A DISCREPANCY THAT THE YAW TRIM WOULD NOT MOVE TO THE R. I REPLACED THE WHOLE PANEL. THIS WAS ON NOV/XA/98. ON NOV/AF/98 A DISCREPANCY WAS MADE THAT THE STANDBY PITCH TRIM SWITCH WAS MOVING INCORRECTLY TO POS SELECTED. THE STANDBY PITCH SWITCH WAS REPLACED AND THE ACFT LEFT WITH A SLIGHT DELAY. MY ONLY CONTRIBUTING FACTOR IS THAT IT TOOK 6 DAYS AND ANOTHER SCHEDULED (AND COMPLETED) LINE CHK BEFORE THE DISCREPANCY WAS FOUND BY A PLT. PARTS NEED TO BE INSPECTED BETTER OR MORE CAREFULLY BEFORE BEING TAGGED, TO PREVENT PARTS BEING BAD FROM STOCK.
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.