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A mechanic was informed that the left engine inboard fan cowl on a B737 aircraft he replaced approximately seventeen days earlier was missing the vortex control device (vcd).
| Attributes | |
| ACN | 983725 |
| Time | |
| Date | 201111 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Cowling |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
November 2011; [I was] assigned to a B737 aircraft [to] replace left-hand engine inboard fan cowl with mechanics Y and Z. Aircraft maintenance manual (amm) paperwork was already pulled up and present on the work table next to the aircraft. New fan cowl was already present in shipping container next to the wing. Old cowl was removed by the three of us and new one installed with four bolts and a simple fit check.after a quick check of the amm installation; I signed the reporting form for the cowling replacement. A maintenance reporting form for placards and markings was already in place in the maintenance work package. [Approximately seventeen days later]; I was informed that the cowl installed that night was found to be missing the vortex control device (vcd). [I] missed a step in amm [procedures]. Suggest to completely read all steps.
Original NASA ASRS Text
Title: A Mechanic was informed that the left engine inboard fan cowl on a B737 aircraft he replaced approximately seventeen days earlier was missing the Vortex Control Device (VCD).
Narrative: November 2011; [I was] assigned to a B737 aircraft [to] replace left-hand engine inboard fan cowl with Mechanics Y and Z. Aircraft Maintenance Manual (AMM) paperwork was already pulled up and present on the work table next to the aircraft. New fan cowl was already present in shipping container next to the wing. Old cowl was removed by the three of us and new one installed with four bolts and a simple fit check.After a quick check of the AMM installation; I signed the reporting form for the cowling replacement. A maintenance reporting form for placards and markings was already in place in the maintenance work package. [Approximately seventeen days later]; I was informed that the cowl installed that night was found to be missing the Vortex Control Device (VCD). [I] missed a step in AMM [procedures]. Suggest to completely read all steps.
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.