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Two mechanics are informed that fan blades had been installed incorrectly; days after they had accomplished a fan blade lube check on the #1 engine of a B737-700. Engine vibration troubleshooting led to the cause of the discrepancy.
| Attributes | |
| ACN | 824811 |
| Time | |
| Date | 200902 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Person 1 | |
| Function | Technician |
| Person 2 | |
| Function | Technician |
| Events | |
| Anomaly | Deviation - Procedural Maintenance |
Narrative:
In february 2009; accomplished fan lube on #1 engine with technicians. Was contacted by day shift supervisor that the fan blades had been installed incorrectly. The task card for that step can be confusing. Supplemental information from acn 824812: aircraft had an engine vibration after february 2009 fan lube. Hangar line graveyard mechanics worked aircraft #1 engine vibration discrepancy later in the week. These mechanics reported to me that the blades were installed incorrectly.
Original NASA ASRS Text
Title: Two Mechanics are informed that fan blades had been installed incorrectly; days after they had accomplished a fan blade lube check on the #1 engine of a B737-700. Engine vibration troubleshooting led to the cause of the discrepancy.
Narrative: In February 2009; accomplished fan lube on #1 engine with technicians. Was contacted by Day Shift Supervisor that the fan blades had been installed incorrectly. The Task Card for that step can be confusing. Supplemental information from ACN 824812: Aircraft had an engine vibration after February 2009 fan lube. Hangar line graveyard mechanics worked aircraft #1 engine vibration discrepancy later in the week. These mechanics reported to me that the blades were installed incorrectly.
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.