Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument
Flight Crew Last 90 Days 58; Flight Crew Total 1200; Flight Crew Type 375
Aircraft Equipment Problem Critical; Inflight Event / Encounter Other / Unknown
Air Traffic Control Issued New Clearance; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; Flight Crew Inflight Shutdown
Aircraft
About an hour into the flight the alternate air door light went on. After briefly discussing the situation; we decided to make a precautionary landing. We informed ATC and got an amended clearance. Very shortly after that; the engine monitor showed a cylinder with an overtemp indication. We then got priority routing and descent. As we descended; we reduced power significantly due to high temp or missing indications on many cylinders. The alt air door light then went out; and the engine occasionally seemed to lose power. We sighted the field and decided to land straight in. Once we were able to glide to the field; we shut off the fuel to the engine; and landed without power uneventfully. There were no injuries; and there was no in-flight fire.
Beech BE36 pilot reporting diverting to an alternate airport after experiencing issues with the alternate air door; and then engine problems that led to an inflight shutdown after landing was assured.