In a development that could improve the safety and reliability of piston aircraft engines, Savvy Analysis founder Mike Busch has created an automated warning system for impending exhaust valve failures. The company's new computer program scans data from electronic engine monitors and spots the signs of valve failures before they happen. Exhaust valve failures are one of the leading causes for potentially catastrophic power losses in piston aircraft engines. "For close to 10 years, I've been talking about the fact that a large percentage of impending exhaust valve failures can be detected through analysis of EGT data in piston aircraft that have a recording engine monitor installed," Busch said. "The symptom of an incipient failure is a slow, rhythmic EGT oscillation with a frequency of the general order of one cycle per minute and an amplitude of 30 to 100 degrees Fahrenheit."
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