B767 flight crew reported the left engine experienced multiple compressor stalls during cruise. The flight crew completed the QRH procedure and continued to destination where a safe landing was executed.
Synopsis
B767 flight crew reported the left engine experienced multiple compressor stalls during cruise. The flight crew completed the QRH procedure and continued to destination where a safe landing was executed.
Narrative
Aircraft X experienced multiple compressor stalls at FL370. We were previously at FL390 when we requested to descend to a lower altitude. For traffic ATC assigned FL370. At level off; it became apparent that there was an issue with the left engine. The white arc remained displayed on the N1 gauge (thrust requested) with no movement on the engine to meet that demand. We noticed multiple popping noises and associated airframe vibration. As the pilot flying; I started to reduce the thrust on the left engine; and increase thrust on the right engine along with selecting continuous thrust. I stated I believe we have compressor stalling and requested the checklist for it. I assumed radio control along with the pilot flying duties so the First Officer (FO) could run the checklist while I coordinated with ATC. I noticed with continuous selected that the airspeed was still rolling back. I elected to [request priority handling] at that time in order to start a descent. I idled the left engine completely once the descent started while the pilot monitoring ran the QRC/QRH. We complied with the QRH procedures and increased thrust on the left engine (moderate amount to not create any further issues) and the engine responded within limits. I discussed and we determined the most prudent action was to leave the engine at idle to possibly avoid future issues coming in to land. The engine remained at idle for the duration of the flight and we elected the QRH path to a single engine landing (left was idled). We landed and taxied to the gate under our own power with Crash Fire Rescue (CFR) behind us. Since there were no adverse indications; we let CFR know we no longer needed their assistance.Cause: Suspected engine compressor stall.
Second reporter narrative
During descent from FL390 to FL370 into ZZZ; we noticed an odd sound coming from behind us. As we leveled at FL370 and the engine power increased we noticed that the left engine was not producing the requested thrust. Looking at the engine indications; all indications seemed reasonable with the exception of N1. We ran the qrc/qrh for Engine Limit or Surge or Stall. We elected to proceed to ZZZ and land keeping the left engine at idle to avoid any potential damage. We landed uneventfully on Runway XXC. After vacating the runway we shut down the left engine and taxied to the gate without any further issues.Cause: Left engine problem.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.