B767 flight crew reported left and right Engine Control status messages followed by left and right Engine Control EICAS messages on descent. Crew reported right engine failed to respond to inputs until after landing.
Synopsis
B767 flight crew reported left and right Engine Control status messages followed by left and right Engine Control EICAS messages on descent. Crew reported right engine failed to respond to inputs until after landing.
Narrative
While descending on the ZZZZZ4 arrival landing west into ZZZ we noticed two status messages. The status messages were L ENG (Engine) CONTROL R ENG CONTROL. At this point; we noticed the right engine was stuck at idle thrust. We attempted to regain thrust control of the right engine several times. However; the engine remained at idle thrust. At this time we had no EICAS messages. We elected to treat this as an engine failure. We ran the QRH for an engine failure. We elected to keep the right engine running as it was still operating normally at idle thrust. We advised ATC at and landed at ZZZ airport. Given the weather and our altitude landing at ZZZ was the most prudent decision in our opinions. I called Flight Control to advise them of the situation once we had requested priority handling. After landing on Runway XXL we cleared at Taxiway 1. We had the ZZZ Fire Department check the aircraft. The Fire Department said everything looked normal. We then had two EICAS messages appear. The messages were L ENG CONTROL and R ENG CONTROL. I then tried pushing the right thrust lever up to see if the engine would respond. The right engine did respond. We then taxied to the gate normally.
Second reporter narrative
While descending on the arrival into ZZZ; we were in IMC and I noticed the aircraft was holding a lot of left aileron and the yaw was out. I was pilot flying and began to adjust the rudder trim. While I was trimming the rudder; Captain noticed the right engine was operating at ~32% N1 and that we had status messages for both left and right engine controllers. The EGT and N2 were responsive to throttle inputs but the N1 remained low. We tried different thrust lever settings and noted there were no changes to the flight characteristics and decided the right engine was not producing flight thrust. We treated it as an engine failure and ran the QRH procedure but elected not to shutdown the engine as it was running within parameters other than the N1. We advised ATC and continued into ZZZ. Captain performed the landing uneventfully. On the rollout we received EICAS messages for both engine controllers. After landing and clearing the runway for ARFF (Airport Rescue and Firefighting) inspection we noticed the EGT on the right engine had dropped to match the left engine. When advancing the thrust lever the N1 was responsive on the right engine. After receiving an all clear from fire rescue command we taxied into the gate.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.