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After opening the overwing door # 3-L (left) for ventilation while performing maintenance in a very hot B747-400 cabin interior; mechanic attempts to close the door and hears a metallic click like a screw falling inside door. Cycling the 'arm/disarm' lever several times; he re-opens the door and hears the door assist bottle blowing and the slide deploying.
| Attributes | |
| ACN | 890078 |
| Time | |
| Date | 201005 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Escape Slide |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Deviation - Procedural Published Material / Policy |
Narrative:
I was working in the cabin; it was hot so I had opened the door for a little ventilation; I chose the overwing door for it's safety. I went to close the door and thought I heard a metallic click like a screw falling inside. I cycled the 'arm/disarm' lever several times while listening to the door. Then I opened the door to see if anything had fallen out and to check for smooth operation and to see if I could duplicate the faint sound I had heard. The sound I did hear was the door [assist] bottle blowing; then the slide and I realized I had made a grievous error with the 'arming' lever. I did not try to hold the door shut and released the handle.I had had a low grade headache most of the day; figured it was due to the heat. I have since experienced other flu like symptoms. I really didn't feel that bad and know I made a mistake of which I am not proud of myself. I did shake the door afterwards and heard no noises nor did anything drop out other than the slide.
Original NASA ASRS Text
Title: After opening the overwing door # 3-L (left) for ventilation while performing maintenance in a very hot B747-400 cabin interior; Mechanic attempts to close the door and hears a metallic click like a screw falling inside door. Cycling the 'ARM/DISARM' lever several times; he re-opens the door and hears the door assist bottle blowing and the slide deploying.
Narrative: I was working in the cabin; it was hot so I had opened the door for a little ventilation; I chose the overwing door for it's safety. I went to close the door and thought I heard a metallic click like a screw falling inside. I cycled the 'Arm/Disarm' lever several times while listening to the door. Then I opened the door to see if anything had fallen out and to check for smooth operation and to see if I could duplicate the faint sound I had heard. The sound I did hear was the door [assist] bottle blowing; then the slide and I realized I had made a grievous error with the 'Arming' lever. I did not try to hold the door shut and released the handle.I had had a low grade headache most of the day; figured it was due to the heat. I have since experienced other flu like symptoms. I really didn't feel that bad and know I made a mistake of which I am not proud of myself. I did shake the door afterwards and heard no noises nor did anything drop out other than the slide.
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.