B737 first officer reported they experienced several compressor stalls in right engine at FL370. Cre...

Narrative:

Incident occurred during cruise flight at FL370 approximately 1 hour and 15 minutes into a scheduled 4 hour and 12 minute flight. Audible 'bang' noises were heard in the cockpit; emanating from the right side of the aircraft; in the vicinity of the #2 engine. The N1 indication for the motor was then observed to drop to approximately 70%; without a commensurate movement of the #2 thrust lever. The N1 indication then proceeded to increase to the normal cruise operating range; of roughly 90-92%; within approximately 10-15 seconds of the onset of the engine anomaly. After 'stabilizing' for 5-10 seconds; there was a subsequent occurrence - much like the first; after which we assessed that the #2 motor was compressor stalling. The captain; the flying pilot; then directed the initiation of the engine failure checklist in the quick reference handbook (QRH). The checklist items were accomplished in accordance with the QRH; which included the shutdown of the #2 engine. An emergency divert was then coordinated with air traffic control to the nearest suitable landing facility. Single-engine approach and landing checklists were accomplished as directed by the QRH. An uneventful single-engine visual approach and landing was performed in visual conditions to the landing runway.

Original NASA ASRS Text

Title: B737 First Officer reported they experienced several compressor stalls in right engine at FL370. Crew shut down the engine in accordance with procedure and diverted to nearest suitable airport.

Narrative: Incident occurred during cruise flight at FL370 approximately 1 hour and 15 minutes into a scheduled 4 hour and 12 minute flight. Audible 'bang' noises were heard in the cockpit; emanating from the right side of the aircraft; in the vicinity of the #2 engine. The N1 indication for the motor was then observed to drop to approximately 70%; without a commensurate movement of the #2 thrust lever. The N1 indication then proceeded to increase to the normal cruise operating range; of roughly 90-92%; within approximately 10-15 seconds of the onset of the engine anomaly. After 'stabilizing' for 5-10 seconds; there was a subsequent occurrence - much like the first; after which we assessed that the #2 motor was compressor stalling. The Captain; the Flying Pilot; then directed the initiation of the Engine Failure Checklist in the Quick Reference Handbook (QRH). The checklist items were accomplished in accordance with the QRH; which included the shutdown of the #2 engine. An emergency divert was then coordinated with Air Traffic Control to the nearest suitable landing facility. Single-engine Approach and Landing checklists were accomplished as directed by the QRH. An uneventful single-engine visual approach and landing was performed in visual conditions to the landing runway.

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.

Attributes
ACN	1111711
Time
Date	201308
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Visual Approach
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	First Officer Pilot Not Flying
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 8000 Flight Crew Type 3500
Events
Anomaly	Aircraft Equipment Problem Critical

B737 first officer reported they experienced several compressor stalls in right engine at FL370. Crew shut down the engine in accordance with procedure and diverted to nearest suitable airport.