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A line mechanic reports he inadvertently performed a more involved overnight-2 service check instead of the scheduled overnight-1 check on a company ATR-72-200. The mechanic was disciplined for not following the scheduled overnight-1 check even though he found positive chip indications from both engine chip detectors which delayed the aircraft for three hours.
| Attributes | |
| ACN | 900927 |
| Time | |
| Date | 201004 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | ATR 72 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Powerplant Lubrication System |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
Maintenance complications and unsafe activity. During oil check's on my regular shift; found in both engines; positive chip detectors in an ATR-72-200; during overnight check. This event occurred because the aircraft had an overnight-1 check and I; by mistake; performed an overnight-2 check; which is a more complex check. In the first advisory [discipline] letter supervisor X tells me that I have to correct this problem; for my finding a discrepancy. But [preventing] an aircraft to fly unairworthy is not a problem. I was given a first step [discipline] for finding the discrepancy mentioned above by supervisor. The phase of operation was routine maintenance [and the] cause was communication between maintenance crew and lead mechanic. [There were] memory lapse (forgot) and lack of leadership [from] supervision. [There was] a flight delay of three hours.
Original NASA ASRS Text
Title: A Line Mechanic reports he inadvertently performed a more involved Overnight-2 Service Check instead of the scheduled Overnight-1 Check on a company ATR-72-200. The Mechanic was disciplined for not following the scheduled Overnight-1 Check even though he found positive chip indications from both engine chip detectors which delayed the aircraft for three hours.
Narrative: Maintenance complications and unsafe activity. During Oil Check's on my regular shift; found in both engines; positive chip detectors in an ATR-72-200; during overnight check. This event occurred because the aircraft had an Overnight-1 check and I; by mistake; performed an Overnight-2 check; which is a more complex check. In the first advisory [discipline] letter Supervisor X tells me that I have to correct this problem; for my finding a discrepancy. But [preventing] an aircraft to fly unairworthy is not a problem. I was given a first step [discipline] for finding the discrepancy mentioned above by Supervisor. The phase of operation was routine maintenance [and the] cause was communication between maintenance crew and Lead Mechanic. [There were] memory lapse (forgot) and lack of leadership [from] Supervision. [There was] a flight delay of three hours.
Data retrieved from NASA's ASRS site as of April 2012 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.