Can we convert a Lycoming O-540-J3A5D from dual mag drive to separate drives? Can it be done on a 1980 Dakota 236? Our club, The Flying 20 Club of Danbury, Conn., has three planes, a Dakota and two Archers. Recently,during the overhaul of one of our Archers, N8198P, we had the plane equipped with the […]
Confusion abounds on difference in rocker arms
I’m confused about the rocker arm differences on the O-360-A4K parallel valve cylinders because I know about the extreme heat that the exhaust valves endure. My question is why does the intake rocker arm #69444 have the extra oil hole that leads to the intake valve shaft to cool and lubricate it while the exhaust […]
Can I install a constant-speed prop on my engine?
I have a Lycoming O-360-A3A in my Cherokee. According to the Type Certificate Data Sheets (TCDS), this engine is similar to an -A1A, except without provisions for a constant speed prop. Nevertheless, it is equipped with a hollow crankshaft, and there is a pad on the accessory case for a prop governor. A friend told […]
EGT: What’s normal
If you notice a sudden change compared to what you’ve experienced, then a chat with your maintenance technician might be in order.
Are dual mags reliable?
I own a Cessna R-182 that has a Lycoming O-540 J3C5D engine. It seems like a great engine and runs well. I have a concern about the “”dual-pack”” type magnetos that run off a common gear. Yesterday, another pilot told me of an engine failure that he had years ago in a Cherokee Six where […]
And now, the rest of the story: An update on increased levels of copper in oil
After my Nov. 3 column, “”Why are there increased levels of copper in my oil?”” was published, I received some valuable advice from industry experts on the subject. After doing further research, here’s the rest of the story: First of all, the column was on the mark, but I feel I may have been off […]
Where are the expert answers? Unhappy reader tired of being told to “”look it up””
I am having a hard time finding any usefulness in your column. People ask specific questions and you tell them to look it up. As a reader, I would like to see some sort of expert answer to their questions. Like the mag check, what is your opinion (What’s the best way to test a […]
Why are there increased levels of copper in my oil?
Recent oil analyses seem to be showing increased levels of copper coming from my XP-360. Could you help with a diagnosis? Steve Glasgow-Cappy via email I’ll shoot from the hip on this one because I need more specific information to answer your question, but let’s see what we can do. How about I just throw […]
What STCs are available for my engine?
Can you give me an idea of what STCs are available to convert an O-320-E3D from 150 to 160 hp? David Austin Ponder, Texas David, I suggest you go to the following website to do your research: Airweb.FAA.gov/STC. Once there you’ll be offered several options to locate the information you’re looking for. When looking for […]