Narrative:

While cruising at 7000 ft on an IFR flight plan; my single engine airplane began to experience uncommanded loss of power during cruise resulting in a diversion and landing at an unplanned airport.on a prior flight another pilot had reported high oil consumption. Following that report maintenance had inspected the aircraft and found a fouled turbo check valve which was cleaned. All engine indications remained normal during this flight. While enroute; the engine began to experience reduced power. I immediately noted the best airport for a diversion and notified ATC of my condition. I was cleared to divert to the best airport and began in flight procedures for a loss of engine power. As I made my way direct to the intended airport of landing ATC asked me to descend to 5000 MSL and I indicated I wanted to maintain as much potential energy as I could to assure a safe landing and I was cleared to do so. I asked for the active runway and was given that information immediately (allowing for straight in approach). ATC indicated I was #1 to land and all traffic had been diverted. I was cleared to descend to 1600 MSL and again indicated I wanted to maintain energy. ATC was concerned I would overshoot the airport but I reassured them I would keep myself in a position to land. I verified the tower frequency with ATC; they concurred and told me to switch to tower frequency. The tower cleared me to land. I requested a 360 about 1NM from the landing runway to dissipate energy now that I was assured I had the field and was cleared to do so. I landed in a normal attitude with normal speed in the touchdown zone. While I have flown in the make and model extensively this was a new airplane which I have only flown 3 previous times. The apparent cause of loss of power was related to cylinder issues and currently all 6 are being replaced. More in-depth review of the maintenance logs after the loss of engine power has revealed that the engine on this plane was replaced only 2-years back and the oil check valve which was cleaned recently had been changed in the recent past. Had I been more aware of the previous maintenance issues this plane had experienced I might have asked for a deeper maintenance review of the airplane prior to flying it on the day in question.

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Original NASA ASRS Text

Title: SR22 pilot reported a loss of engine power that resulted in a diversion.

Narrative: While cruising at 7000 ft on an IFR flight plan; my single engine airplane began to experience uncommanded loss of power during cruise resulting in a diversion and landing at an unplanned airport.On a prior flight another pilot had reported high oil consumption. Following that report maintenance had inspected the aircraft and found a fouled turbo check valve which was cleaned. All engine indications remained normal during this flight. While enroute; the engine began to experience reduced power. I immediately noted the best airport for a diversion and notified ATC of my condition. I was cleared to divert to the best airport and began in flight procedures for a loss of engine power. As I made my way direct to the intended airport of landing ATC asked me to descend to 5000 MSL and I indicated I wanted to maintain as much potential energy as I could to assure a safe landing and I was cleared to do so. I asked for the active runway and was given that information immediately (allowing for straight in approach). ATC indicated I was #1 to land and all traffic had been diverted. I was cleared to descend to 1600 MSL and again indicated I wanted to maintain energy. ATC was concerned I would overshoot the airport but I reassured them I would keep myself in a position to land. I verified the tower frequency with ATC; they concurred and told me to switch to tower frequency. The tower cleared me to land. I requested a 360 about 1NM from the landing runway to dissipate energy now that I was assured I had the field and was cleared to do so. I landed in a normal attitude with normal speed in the touchdown zone. While I have flown in the make and model extensively this was a new airplane which I have only flown 3 previous times. The apparent cause of loss of power was related to cylinder issues and currently all 6 are being replaced. More in-depth review of the maintenance logs after the loss of engine power has revealed that the engine on this plane was replaced only 2-years back and the oil check valve which was cleaned recently had been changed in the recent past. Had I been more aware of the previous maintenance issues this plane had experienced I might have asked for a deeper maintenance review of the airplane prior to flying it on the day in question.

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.