<< >> NASA ASRS Report 1075566, March 2013

When a lear 25 pilot turned the right engine nacelle heat off after leveling and accelerating at FL410 it flamed out so during descent toward FL200 he restarted the engine and returned to FL410.

Attributes
ACN	1075566
Time
Date	201303
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Learjet 25
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 12000 Flight Crew Type 1400
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

Shortly after leveling off at FL410; and while still accelerating to cruise speed; I turned off the nacelle heat switches that had been used on the initial climb. This caused an increase in EPR; which resulted in an immediate right engine flameout due to the internal pressure change in the engine. We requested descent to FL200 for the engine re-start procedure. Center granted this request. We descended to below FL250; restarted the engine in accordance with the checklist procedure. We then requested climb to cruise altitude and completed the flight normally from that point. The aircraft remained in full control at all times.

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Original NASA ASRS Text

Title: When a Lear 25 pilot turned the right engine nacelle heat OFF after leveling and accelerating at FL410 it flamed out so during descent toward FL200 he restarted the engine and returned to FL410.

Narrative: Shortly after leveling off at FL410; and while still accelerating to cruise speed; I turned off the nacelle heat switches that had been used on the initial climb. This caused an increase in EPR; which resulted in an immediate right engine flameout due to the internal pressure change in the engine. We requested descent to FL200 for the engine re-start procedure. Center granted this request. We descended to below FL250; restarted the engine in accordance with the checklist procedure. We then requested climb to cruise altitude and completed the flight normally from that point. The aircraft remained in full control at all times.

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.