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Pilot of aerobatic aircraft reports inadvertent spin entry at the top of a loop. During the recovery one landing gear extends on its' own and the reporter has significant difficulty getting its mate to extend with normal and emergency methods; but is ultimately successful. While attempting to extend the remaining gear over a private field an near midair collision occurs with a large model aircraft.
| Attributes | |
| ACN | 846061 |
| Time | |
| Date | 200907 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Experimental |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Other Aerobatics |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Experimental |
| Operating Under FAR Part | Part 91 |
| Flight Plan | VFR |
| Component | |
| Aircraft Component | Main Gear |
| Person 1 | |
| Function | Single Pilot |
| Qualification | Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 50 Flight Crew Total 1500 Flight Crew Type 600 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
Practicing aerobatics at 1500-4000 ft. During loop at top aircraft departed into spin. Recovery was difficult and different from normal spin. Saw one landing gear was down and other was up. When gear (the one still up) was attempted to be lowered; it would not show locked. Proceeded to friends private strip and tried to contact via radio; with no luck. Went back to ZZZ and tried various things to get gear to lock down with no luck. Finally; got gear to lock using a combination of emergency blow down and normal system. Landed safely. Found emergency/normal air system shuttle valve full of 'goo' and stuck in middle position. Cleaned both valves; jacked and cycled gear; now works ok. Blew out all pneumatic lines. During the attempt to get gear down some maneuvers and altitudes might be considered excessive below 1500 foot minimum acrobatic altitude but they were only very short duration. During this time at low altitude I also has a near miss with a model aircraft. It was about 5 feet in size. Ironically model was doing acrobatics as I was making approach to private landing strip! A bad day.
Original NASA ASRS Text
Title: Pilot of aerobatic aircraft reports inadvertent spin entry at the top of a loop. During the recovery one landing gear extends on its' own and the reporter has significant difficulty getting its mate to extend with normal and emergency methods; but is ultimately successful. While attempting to extend the remaining gear over a private field an NMAC occurs with a large model aircraft.
Narrative: Practicing aerobatics at 1500-4000 FT. During loop at top aircraft departed into spin. Recovery was difficult and different from normal spin. Saw one landing gear was down and other was up. When gear (the one still up) was attempted to be lowered; it would not show locked. Proceeded to friends private strip and tried to contact via radio; with no luck. Went back to ZZZ and tried various things to get gear to lock down with no luck. Finally; got gear to lock using a combination of emergency blow down and normal system. Landed safely. Found emergency/normal air system shuttle valve full of 'goo' and stuck in middle position. Cleaned both valves; jacked and cycled gear; now works OK. Blew out all pneumatic lines. During the attempt to get gear down some maneuvers and altitudes might be considered excessive below 1500 foot minimum acrobatic altitude but they were only very short duration. During this time at low altitude I also has a near miss with a model aircraft. It was about 5 feet in size. Ironically model was doing acrobatics as I was making approach to private landing strip! A bad day.
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.