A G1159 engine had a compressor stall and RPM roll back at FL340 after climbing out of icing. The cr...

Attributes
ACN	852312
Time
Date	200909
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream II (G1159)
Operating Under FAR Part	Part 135
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 7512 Flight Crew Type 3200
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 8100 Flight Crew Type 1500
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Weather / Turbulence

Narrative:

During climb to altitude we encountered IMC conditions. At approximately 8000 ft AGL we selected engine heat on. We continued to climb in IMC breaking out at 32000 ft MSL on the way to FL380. At approximately 34000 ft we experienced a compressor stall and rollback on the left engine. We selected igniters on and lowered the nose to maintain airspeed in effort to ensure the engine remained running. ATC was advised of an altitude deviation after we ensured the engine was indeed running normally with no indication of problems. This was accomplished at approximately 33000 ft. We then informed ATC that we were operating normally again and requested a climb to our cruise altitude. The most likely contributing factor in this event was prolonged operation in icing conditions.; on climbout in IMC with engine heat on; we experienced a loud boom and a slight rollback on the number one engine at approximately 34000 ft. We descended to keep the airspeed up to keep the motor running. We advised ATC of our situation and to why we were descending 1000 ft in a climb. They were very helpful and receptive to our situation and took our info over the radio as to our problem. The motor recovered and the rest of the flight was uneventful.

Original NASA ASRS Text

Title: A G1159 engine had a compressor stall and RPM roll back at FL340 after climbing out of icing. The crew descended to keep the engine running and after it stabilized continued the climb to FL380.

Narrative: During climb to altitude we encountered IMC conditions. At approximately 8000 FT AGL we selected engine heat on. We continued to climb in IMC breaking out at 32000 FT MSL on the way to FL380. At approximately 34000 FT we experienced a compressor stall and rollback on the left engine. We selected igniters on and lowered the nose to maintain airspeed in effort to ensure the engine remained running. ATC was advised of an altitude deviation after we ensured the engine was indeed running normally with no indication of problems. This was accomplished at approximately 33000 FT. We then informed ATC that we were operating normally again and requested a climb to our cruise altitude. The most likely contributing factor in this event was prolonged operation in icing conditions.; On climbout in IMC with engine heat on; we experienced a loud boom and a slight rollback on the number one engine at approximately 34000 FT. We descended to keep the airspeed up to keep the motor running. We advised ATC of our situation and to why we were descending 1000 FT in a climb. They were very helpful and receptive to our situation and took our info over the radio as to our problem. The motor recovered and the rest of the flight was uneventful.

Data retrieved from NASA's ASRS site as of July 2010 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.