Fresh Annual

Why it’s no substitute for a proper independent prebuy. Shortly after the student pilot buyer and his CFI ferried the Warrior from Texas to California, the buyer’s mechanic found nearly a half-teaspoon of ferrous metal in the Lycoming’s suction screen and oil filter....

Why Valves Stick…

…and how you can avoid engine damage and power loss if you know the answer. A stuck exhaust valve caused a bent pushrod and broken pushrod housing on this Lycoming engine. If you fly behind a Continental or Lycoming, each of your engine’s cylinders has two valves,...

Justice Denied?

When it comes to GA crashes, the NTSB doesn’t always get it right, nor does the jury In December of 2012, a father and his son arrived at the airport to pick up the father’s Cessna 421C cabin-class piston twin, which had been in the maintenance shop for months...

Predictive Maintenance

Condition-based maintenance meets big data and artificial intelligence For the past 20 years, I’ve been preaching the gospel of Reliability-Centered Maintenance (RCM), the then-revolutionary philosophy of maintenance developed in the 1960s at United Airlines by...