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LR55 flight crew reports becoming stuck when the right main gear leaves the paved surface during a 135 degree turn from a high speed exit to the parallel taxiway. Darkness and fog contributed to the incident. A tug is required to extract the aircraft.
| Attributes | |
| ACN | 1120436 |
| Time | |
| Date | 201310 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Marginal |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Learjet 55 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying Captain |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 75 Flight Crew Total 9850 Flight Crew Type 3050 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Commercial |
| Experience | Flight Crew Last 90 Days 60 Flight Crew Total 2300 Flight Crew Type 400 |
| Events | |
| Anomaly | Ground Excursion Taxiway |
Narrative:
After landing I exited on taxiway A3. As I made the right-hand turn onto taxiway a; the right main gear departed the pavement and sank into soft mud. The effect was equal to applying full right differential braking and overpowered the nose wheel steering. In an instant; all three landing gear were in the mud. The aircraft had to be extracted with a tug and one taxiway light was knocked over. There was no damage to the aircraft. A combination of factors contributed to this incident: patchy fog congregating at the edges of the runway and taxiways; my failure to keep the yellow stripe in sight and the nose-wheel on it; the unexpectedly sharp right turn (approximately 135 degrees) required and the resulting sharp point of unpaved area extending into the turn radius.
Original NASA ASRS Text
Title: LR55 flight crew reports becoming stuck when the right main gear leaves the paved surface during a 135 degree turn from a high speed exit to the parallel taxiway. Darkness and fog contributed to the incident. A tug is required to extract the aircraft.
Narrative: After landing I exited on Taxiway A3. As I made the right-hand turn onto Taxiway A; the right main gear departed the pavement and sank into soft mud. The effect was equal to applying full right differential braking and overpowered the nose wheel steering. In an instant; all three landing gear were in the mud. The aircraft had to be extracted with a tug and one taxiway light was knocked over. There was no damage to the aircraft. A combination of factors contributed to this incident: Patchy fog congregating at the edges of the runway and taxiways; my failure to keep the yellow stripe in sight and the nose-wheel on it; the unexpectedly sharp right turn (approximately 135 degrees) required and the resulting sharp point of unpaved area extending into the turn radius.
Data retrieved from NASA's ASRS site as of July 2013 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.