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A line mechanic reports an access panel was found missing from a B737 aircraft # 1 engine pylon upper aft nacelle during a flight crew walk-around. The same panel is used to access electrical connectors for the engine nose cowl thermal anti-ice valve and thermal anti-ice pressure switch on the cfm-56 engine.
| Attributes | |
| ACN | 951428 |
| Time | |
| Date | 201105 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Pylon Fasteners & Latches |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Technician 18 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy |
Narrative:
Top aft nacelle strut; access panel for # 1 engine found to be missing upon flight crew walk around at ZZZ. Pilots were informed that the panel came off in flight. Another technician and I did a job the previous night that had us remove and replace this access panel. When it was taken off; some of the wing nuts were missing and we fished them out of the opening and reinstalled them to the panel screws. The other mechanic installed the panel and I signed-off the job. Ground crew in ZZZ inspected and released the aircraft for service. [Would] suggest making sure that hardware is installed correctly and mechanic knows how to do the job.
Original NASA ASRS Text
Title: A Line Mechanic reports an access panel was found missing from a B737 aircraft # 1 engine pylon upper aft nacelle during a flight crew walk-around. The same panel is used to access electrical connectors for the engine nose cowl thermal anti-ice valve and thermal anti-ice pressure switch on the CFM-56 engine.
Narrative: Top aft nacelle strut; access panel for # 1 engine found to be missing upon flight crew walk around at ZZZ. Pilots were informed that the panel came off in flight. Another Technician and I did a job the previous night that had us remove and replace this access panel. When it was taken off; some of the wing nuts were missing and we fished them out of the opening and reinstalled them to the panel screws. The other Mechanic installed the panel and I signed-off the job. Ground crew in ZZZ inspected and released the aircraft for service. [Would] suggest making sure that hardware is installed correctly and Mechanic knows how to do the job.
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.