Airplane Owner Maintenance - By Dean Showalter

Do you think these really are cracks between the spark plug bosses and the fuel injector bosses? (Cirrus SR22 Continental engine.) The owner of a Cirrus SR22 was told by a service center he had 4 cracked cylinders on his engine. However, after taking a closer look and bringing their most experienced technicians together to […]

The charging system was not working, but why? There was normal voltage at the alternator field terminal. The field circuit resistance seemed normal as well. But the alternator was not producing the normal 28 volts during operation. Occasionally, it would produce a small amount of output voltage, like 25 or 26 volts, and then drop […]

Dan and Jeanne are some of the nicest people you will ever meet, so it’s always a privilege to work on their airplane. It was annual inspection time, and the compression test on cylinder #1 was 25/80. The borescope showed a corresponding reason for the low compression… the exhaust valve had an uneven appearance, indicating […]

This Bonanza had a problem in the landing light wiring circuit. All kinds of weird things were happening when the light was turned on in flight. You can listen to the podcast audio for more details on this squawk. I removed the induction filter cover and the landing light assembly and inspected the wiring. It […]

It was a beautiful Tuesday morning at KSHD, and we had the maintenance hangar door open with a good view of the runway. A nice, red and white Piper Lance made a perfect landing on runway 5. As the airplane taxied up to the ramp, I thought, “It would be nice to meet that guy, […]

And the winner is… Ben Moroze! Recently, in podcast episode #223, I asked for help in identifying an ATC intersection we flew over on our way into Dulles Airport, (KIAD) awhile back. I remembered it sounded something like “you-dee-ah” or something similar. Maybe something like “UDIYA” except that’s not it. Well, Ben emailed me after […]

Recently, I received an email from Jim Janaitus, owner of a Cessna 182. He told me the story of lapping an exhaust valve on his engine because the valve showed signs of burning even though the compression was still in the high 60’s. Take a look at the appearance of the valve before lapping: The […]

In the beginning of this week’s podcast episode, I want to give a big congratulations to my friend, Chris Wieczorek, who recently got his A&P certificate! Listen to the audio to find out how Chris pursued getting his A&P in the midst of being a full time attorney and engineer with a wife and 4 […]

I inspected another A36 Bonanza recently, and one of the cylinder compressions was too low… lower than the minimum prescribed by Continental using the master orifice tool. I had two options: Option One: Remove the cylinder for repair or replacement. Option Two: Make the exhaust valve seal better and improve the compression result in hopes […]

Maui is simply amazing! Maria and I thoroughly enjoyed our trip, and here are some highlights. (And for the aviation maintenance portion of the trip, see the last episode, 220.) So many indescribably beautiful beaches to see: Maria and her new friend, Firmiana, at the Upcountry Farmers Market… the most amazing farmer’s market I’ve ever […]

We arrived on Maui the evening of March 27 and were greeted by our friends, John and Leslie Caubble, with a “lei greeting” which is a warm welcome with a beautiful ring of fresh flowers around your neck. We were there to do several things: Connect with our friends, the Caubbles. Work on the flight […]

It took some significant detective work and deciphering to solve this mystery. The brake caliper at the top of the photo was the wrong part number for the A36 Bonanza I was working on. The one at the bottom of the photo is a serviceable one we found on eBay. It was the correct one, […]

Not long ago, there was an oil leak on the right engine of a Cessna 414. The leak was significant enough to come out the louvers on the top cowling in flight. There was oil all over the rear inboard area of the engine, so the big question was, “Where is the oil leak coming […]

Clark and his family came to Virginia to visit his mom recently, and on the way up from Florida, the right vacuum pump quit working… as often happens when a vacuum pump quits, the drive shaft had sheared off, saving the engine from catastrophic damage. In times like these, a good question to ask is, […]

This is a good looking exhaust valve with a nice concentric appearance. However, the compression was very low at 8/80. I lapped the valve, hoping it would improve the compression test result… it only came up to 10/80, and that was after running the engine again and getting it nice and hot. Although the valve […]