<< >> NASA ASRS Report 1188102, July 2014

LR60 first officer reports encountering severe turbulence at FL400 which resulted in an altitude loss of over 2;500 ft before control is regained.

Attributes
ACN	1188102
Time
Date	201407
Local Time Of Day	1201-1800
Place
Locale Reference	ZJX.ARTCC
State Reference	FL
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Learjet 60
Operating Under FAR Part	Part 135
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 4200 Flight Crew Type 800
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Inflight Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

North of chs we encountered severe-extreme turbulence at an altitude of FL400. We accumulated rime ice and we had a total altitude loss of 2;500-2;700 feet until we fully recovered the aircraft from the turbulent weather and landed. Crew and passengers were ok and the aircraft went under inspection to make sure everything is ok.

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Original NASA ASRS Text

Title: LR60 First Officer reports encountering severe turbulence at FL400 which resulted in an altitude loss of over 2;500 FT before control is regained.

Narrative: North of CHS we encountered severe-extreme turbulence at an altitude of FL400. We accumulated rime ice and we had a total altitude loss of 2;500-2;700 feet until we fully recovered the aircraft from the turbulent weather and landed. Crew and passengers were ok and the aircraft went under inspection to make sure everything is ok.

Data retrieved from NASA's ASRS site 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.