Probable Cause: A partial loss of engine power resulting from cylinder detonation and a cracked spark plug, which resulted in a forced landing and impact with terrain.
Spark Plugs
Hot Day, Heavy Airplane Bad Combination for Pilot and Two Passengers
Probable Cause: A loss of engine performance due to carbon fouling of three spark plugs that, when combined with the airplane’s high gross weight condition, resulted in a collision with trees and terrain.