Category Archives: aircraft maintenance

Is oil analysis a good idea

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This is a good question for not only aircraft owners but ,boat and performance car owners. too.

Question. Is oil analysis a good idea or just a waste of money?
Answer. 
I think it depends on the engine.  Most mechanics would probably agree that a high time engine would benefit from oil analysis.  If you are trying to extend the time between overhauls (TBO),  oil analysis is a must.  Flying your aircraft past TBO can save you a few bucks in the near future but can (but not always) increase the actual cost of the overhaul in the long term.  It could be one of those “pay me now or pay me more later”!  Extended use might damage parts instead of just wearing them down.  

But oil analysis and regular oil changes can help the owner monitor some of the internal conditions of the engine.  Which also means if you start a new engine on the oil analysis program from the very start you can continually monitor the engines wear throughout the years of operation. 

Typically, the average oil change would be sufficient for most owners to check the oil for any contaminants.  The mechanic or owner  who does the oil change should cut the filter, or inspect the oil screen and look for any type of contamination.  If you are looking at an aircraft to buy, and you have the time, an oil analysis would probably offer you finer (no pun intended) details than just the filter or screen test.  In fact, if you find something in the screen or filter it will probably indicate wear or damage that may be significant and might be a indicator that you should do oil analysis.

So in the end, no I do not think it is a waste of money.

Proficiency training Simulator or aircraft?

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The following question from a customer asked about doing regular training.  Its important to note that sometimes insurance companies require training in a specific class or category of aircraft.  For example; if you fly a pressurized or cabin class aircraft, you will probably be required to get “factory approved”  initial ground and flight training along with recurrent training after that. Most companies require recurrent every year but there are a few that will go for two or three years between the training. A lot depends on the type of aircraft you are flying.   
That said —- 
Q. Proficiency.  I’m thinking of going to a school such as RTC, Flight Safety etc.  Most of these companies do simulator training.  Am I better off going out with an instructor, doing the FAA Wings kind of thing, or going to a school?  Training in the airplane will give me some dual, my Instrument Proficiency Check (IPC) and my flight review?  Which is a better way to go?

A. That’s a tough one.  From an insurance standpoint, many of the underwriters require training from a factory approved school that specializes in your specific aircraft.  That training is often in a simulator and counts as your IPC, flight review and dual.  That is if it’s from an approved school or training institution. 

I’m a big believer in the FAA Wings programs and flight simulators to keep a pilot proficient.  If the weather is really bad or your checkbook is a little empty, flying with a Flight Simulator program on your home computer can be a great help.  While it might not be logging “real” hours, it can sure help keep your mind in the flying mood.  The Flight Sim program can overlay weather, set up approaches and do almost everything a pilot need s to do to feel comfortable in their aircraft.  Flying to a new destination?  Set up the Flight Sim program to fly into the area, make a few approaches and you’ll feel like you been there before when you get there for the first time.

Whenever possible take advantage of flying the real thing and practice.   Sure I like simulators and software, but I think the real proficiency comes from flying the aircraft.  That’s why we buy an aircraft to begin with.  Hook up with a qualified instructor that you like and go out and have fun and learn at the same time.  

Question about tail-wheel aircraft with wrinkles!

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The question from a reader customer was – “I’m looking at a tail wheel aircraft that has wrinkles or dents around where main landing gear legs go into the fuselage. There is nothing in the logbooks about repairs, has this aircraft been wrecked?”
My thoughts are that wrinkles do not mean wrecked. But they do typically indicate previous damage or stress. I’d guess the aircraft has had a few hard landings or even a few ground loops. Make sure the mechanic looks for a Form 337, Major Alteration and Repair in the aircraft records. You can also order (through the FAA or other search companies) a copy of the FAA 337 Forms for a specific “N” number  aircraft.  This report will show you any Form 337’s that have been filed with the FAA on that particular aircraft.  If that doesn’t show any damage all you have is visual information.
Whatever the result, the mechanic should inspect the gear attach points for un-repaired damage.   Landing gear on any aircraft gets a lot of stress.   Custom built aircraft are notorious for landing gear damage, along with training aircraft.  It doesn’t matter if it is a conventional gear (tail wheel) aircraft or a tri-gear aircraft.  New pilots have a tendency to make hard landings and newly completed custom aircraft take a while to become accustom to.   Don’t be surprised, just make sure the aircraft is inspected carefully.