Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 43; Flight Crew Total 1401; Flight Crew Type 547
Aircraft Equipment Problem Critical; Inflight Event / Encounter Other / Unknown
Air Traffic Control Issued New Clearance; Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
I had an uneventful pre-flight; run up and departure from ZZZ1 enroute to ZZZ2. Approximately 2 hours into the 3.5 hour flight; my left turbine inlet temperature spiked and while trying to diagnose the problem; I heard a grinding noise from the engine. I had just been switched from ZZZ Center to ZZZ1 [Center] and while reporting in; told them that I may [need priority handling]. They immediately located ZZZ airport 20nm at 12 o'clock so I immediately pulled power to 50% to try to preserve my engine. The grinding noise occurred one more time but I was able to land uneventfully under normal landing conditions. The mechanics have diagnosed a potential problem with the alternator and left magneto that could have caused the runaway temps and noises. The aircraft maintenance is being performed and will be certified before I fly it.
SR22 pilot reported engine malfunction in flight that resulted in a diversion and successful precautionary landing.