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A SF340 left landing gear position sensor cannon plug was found loose after an emergency was declared because of an unsafe gear indication.
| Attributes | |
| ACN | 965023 |
| Time | |
| Date | 201108 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Saab 340 Undifferentiated |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Approach |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Indicating and Warning - Landing Gear |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Commercial |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
On final approach when gear was selected down; only the nose and right main gear down lock lights illuminated. The gear handle disagreement light was extinguished as well which means that all gear agrees with the position of the handle. While selecting flaps to 20 the configuration cwp light and horn sounded. We ran the emergency/non normal checklist and then executed a go-around/missed approach. ATC; operations; dispatch and maintenance were notified and we discussed the situation with maintenance thoroughly. We declared an emergency with ATC and notified emergency personnel to standby at the runway of landing. Passengers were kept fully informed of the situation. A normal landing then followed. The event occurred because of a failure to receive a green down and locked light from the left main gear during extension. This was due to a cannon plug that was found unplugged.
Original NASA ASRS Text
Title: A SF340 left landing gear position sensor cannon plug was found loose after an emergency was declared because of an unsafe gear indication.
Narrative: On final approach when gear was selected down; only the nose and right main gear down lock lights illuminated. The gear handle disagreement light was extinguished as well which means that all gear agrees with the position of the handle. While selecting flaps to 20 the CONFIG CWP light and horn sounded. We ran the emergency/non normal checklist and then executed a go-around/missed approach. ATC; Operations; Dispatch and Maintenance were notified and we discussed the situation with Maintenance thoroughly. We declared an emergency with ATC and notified emergency personnel to standby at the runway of landing. Passengers were kept fully informed of the situation. A normal landing then followed. The event occurred because of a failure to receive a green down and locked light from the left main gear during extension. This was due to a cannon plug that was found unplugged.
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.