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A g-iv encountered severe turbulence on an ILS final making aircraft control impossible for approximately 50 seconds. The approach and landing following the turbulence were normal.
| Attributes | |
| ACN | 935230 |
| Time | |
| Date | 201102 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Gulfstream IV / G350 / G450 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | Initial Approach |
| Route In Use | Vectors |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Multiengine Flight Crew Commercial Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 80 Flight Crew Total 13360 Flight Crew Type 360 |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Flight Engineer Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 100 Flight Crew Total 20000 Flight Crew Type 500 |
| Events | |
| Anomaly | Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control |
Narrative:
IFR flight we encountered severe turbulence at 3;000 ft. IMC on a left downwind vector for ILS runway xx; heading and altitude control were near impossible. The autopilot disengaged without command from pilot. This situation lasted approximately 50 seconds. After regaining control of aircraft; we proceeded with normal approach to landing.
Original NASA ASRS Text
Title: A G-IV encountered severe turbulence on an ILS final making aircraft control impossible for approximately 50 seconds. The approach and landing following the turbulence were normal.
Narrative: IFR flight we encountered severe turbulence at 3;000 FT. IMC on a left downwind vector for ILS Runway XX; heading and altitude control were near impossible. The autopilot disengaged without command from pilot. This situation lasted approximately 50 seconds. After regaining control of aircraft; we proceeded with normal approach to landing.
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.