G200 corporate pilot reported engine stall during turn at high altitude resulting in altitude loss d...

Attributes
ACN	1620604
Time
Date	201902
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Gulfstream G200 (IAI 1126 Galaxy)
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 70 Flight Crew Total 13600 Flight Crew Type 6600
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

While at FL380; we were advised we could get into ZZZ (our intended airport) from a change of second choice ZZZ1. ATC asked us to slow to slowest practical speed for sequencing and we complied to slow with mach .64. Then; they asked us to make a 90 degree turn to the left. I did so on the auto pilot; but did not notice that the half bank was not working. Halfway through the turn; the winglets started to slaughter; so I disconnected the auto pilot and leveled the wings off. As I was leveling; I noticed the right engine losing power and acting like a compressor stall. I applied full power and lowered the nose and [advised ATC]. Seconds later; the engine regained power and we notified ATC we were okay; they directed us back where the rest of the flight was normal and uneventful. Due to congested radio traffic; we descended 1;000 feet before we were able to [advise ATC] on the radio.

Original NASA ASRS Text

Title: G200 corporate pilot reported engine stall during turn at high altitude resulting in altitude loss during recovery.

Narrative: While at FL380; we were advised we could get into ZZZ (our intended airport) from a change of second choice ZZZ1. ATC asked us to slow to slowest practical speed for sequencing and we complied to slow with MACH .64. Then; they asked us to make a 90 degree turn to the left. I did so on the auto pilot; but did not notice that the half bank was not working. Halfway through the turn; the winglets started to slaughter; so I disconnected the auto pilot and leveled the wings off. As I was leveling; I noticed the right engine losing power and acting like a compressor stall. I applied full power and lowered the nose and [advised ATC]. Seconds later; the engine regained power and we notified ATC we were okay; they directed us back where the rest of the flight was normal and uneventful. Due to congested radio traffic; we descended 1;000 feet before we were able to [advise ATC] on the radio.

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.