Skylane 182/RG Turbo Skylane/RG
Flight Crew Instrument; Flight Crew Commercial
Flight Crew Last 90 Days 34; Flight Crew Total 359; Flight Crew Type 4
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Maintenance Action
Aircraft
Cessna 182 doing aerial work. Engine went quiet. We noticed manifold pressure went to 13.2 manifold. Completed Engine failure in flight check list. No change 13.2 manifold. Contacted ATC Approach to advise them that we [had] partial power loss. Direct ZZZ airport. Second restart attempted - No change 13.2 manifold pressure. ATC Approach said direct ZZZ airport. Third restart - total electrical power loss. Smelled burning. Landed ZZZ. Secured engine upon landing. Rolled off runway to taxiway and secured aircraft.
I served as a sensor operator in the right seat of a single yoke (there are no controls on the right side) C182 doing aerial survey work. Suddenly; the engine went quiet; and the PIC (pilot-in-command) and I noticed manifold pressure went to 13.2'. It was determined there was an engine failure and we began to run the engine failure in flight checklist. Upon attempting to restart the engine; there was no change from the previous result. The manifold pressure remained at 13.2.' Approach was contacted and communicated there was partial power loss. A direct turn was made to the closest airport; ZZZ. A second engine restart attempt was made and failed. The 13.2 manifold pressure reading did not change. A third engine restart was attempted; and all electrical power was lost; including the radios. Just before loss of electrical power I noticed that two of the cylinder CHT (Cylinder Heat Temperature) gauges on our engine monitor were white; indicating that two cylinders were cooler than the others. There was a successful landing at ZZZ; engine was secured on short final. We were able to clear the runway and stop on the taxiway. Both the PIC and I were okay and the aircraft was undamaged.
C182 pilot and non-flying observer reported an engine failure followed by an electrical system failure resulted in a diversion to a nearby airport.