Category Archives: overhauled aircraft engines

How To Find Reputable Companies When Looking For Aircraft Engines For Sale

How To Find Reputable Companies When Looking For Aircraft Engines For SaleWhen you are first looking at aircraft engines for sale, you might be surprised to note just how many companies there are out there that purport to provide you with the best engines around.

Naturally, just as with any other industry, not all companies are “created equal” when it comes to aircraft engines. There are excellent, mediocre, and poor options in this industry as well. Continue reading How To Find Reputable Companies When Looking For Aircraft Engines For Sale

Aircraft Engine Overhaul Prices: What You Need to Look For

One of the most important requirements in owning an aircraft is understanding aircraft engine maintenance, so an aircraft engine overhaul may be necessary to keep an engine running like new.  An overhaul consists of removing, disassembling, cleaning, inspecting and repairing an aircraft engine.  Costs can run high with the extensiveness of an aircraft engine overhaul, thus it is important to know what to consider before choosing an overhaul company.


Aircraft-Engine-Overhaul-Prices-What-You-Need-to-Look-ForAircraft engine overhaul is always required – this is one of the most important things to remember. Based on the Time between Overhaul (TBO), every aircraft engine must be removed, dismantled, checked and repaired as necessary.  The engine, after being reassembled, is reinstalled in order to remain in service.  For most engines, the TBO is 1,800 to 2,000 hours, which means many years between overhauls for a plane not flown often.


Asking an aircraft engine overhaul facility whether the work will be outsourced or done on-site is advised.  A company that outsources the overhaul, even if it is a segment of the work, loses quality control over service completion.  Therefore, be sure the facility you choose performs the work in-house.


Costs of an engine overhaul should be quoted based on the type of aircraft serviced and the time passed since the last overhaul.  Price can also vary on which series of overhaul the customer requests.  Facilities should not offer a “one-size-fits-all” price for aircraft engine overhauls.


The time for completing an aircraft engine overhaul depends on the type of aircraft and the series of overhaul requested.  On average, an aircraft engine overhaul can take between two and three weeks, depending on the engine’s status and any approval delays from the customer for additional repairs.

When choosing a facility to perform an aircraft engine overhaul, it is important to look at what the price actually includes.  A good facility should be able to give you a rough estimate of the time needed, inform you if outsourcing is required, and give you a cost estimate based on the type of aircraft and the series of overhaul desired.  For more information on aircraft engine overhaul, join our online community on Facebook, Twitter and YouTube.

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The Terminology and Standards of Aircraft Engine Overhaul – Part 3

As a final installment in our series of posts intended to demystify the aircraft engine overhaul process, we at Covington Aircraft want to detail the differences between using new and overhauled parts in an engine overhaul, so that you can make the best and most informed decision possible when TBO time comes around again.

When you’re looking to get an engine overhaul, a key point to remember is that the FAA does not require that all parts need to be replaced with brand new OEM equipment. While it is an accepted practice to replace parts such as pistons, rings, bushings, seals and gaskets, it’s also an accepted practice to reuse internal steel parts like connecting rods, the crankshaft, pushrods, gears and drive shafts, among others.

Testing and replacement


Even if they are reused, all non-new parts are carefully inspected and checked for cracks or defects via non-destructive testing techniques like Magnaflux and dye-penetrant tests. If a part fails to meet specified dimensional limits—either new limits or service limits, depending on the type of overhaul you’ve requested—it will be immediately rejected and replaced, regardless of the owner’s preference on the matter. The downside of this replacement is that some components come in matched sets, which means that a damaged single Planet gear may require the replacement of all Planet gears.

To overhaul or not to overhaul your parts?

When getting an engine overhaul, it can be difficult to decide if you should overhaul your existing cylinders or just replace them with new ones. New cylinders, if available, cost more than overhauling the cylinders you’ve already got. If your existing cylinders don’t have much wear, then it’s probably perfectly acceptable to get them overhauled and reinstalled. Remember that an overhauled cylinder still gets a new cylinder barrel choke and cylinder barrel honed finish, and the guides and seats are refurbished or replaced.

If you’re interested in further information on aircraft engine overhauls for turbine or radial engines, please let us know. We welcome questions and e-mails, and always strive to provide the best service possible to all our customers.

Top 3 Overhauled Aircraft Engines at Covington


There are many different types of aircraft coming and going, our skilled mechanics are constantly on the move, and so they really helped us out coming up with our list.

1. Agricultural Aircraft

An agricultural aircraft has been built or converted for agricultural uses, usually aerial crop spraying or fertilizing, and sometimes they are used for hydro-seeding.  Most of these agricultural aircraft are fixed wing models. Agricultural aircraft enable food production and fiber cultivation, which helps feed and clothe people around the world.  Agricultural aviation is extremely vital to the world’s food sources.

2. Bush or “Back Country” Aircraft

Bush planes use a variety of aircraft but there are a few more common aircraft types, such as: the DeHaviland Beaver and the Single Engine Otter. These flight models provide passenger comfort as well as hauling huge freight loads to remote areas.  Bush planes are usually used when there is no other way to get supplies in to a secluded area.

3. WarBird Aircraft

WarBird aircraft is usually designated by type: fighter, trainer, bomber, jet, etc. and then by manufacturer. They are often considered to be luxury items, but they also provide a great link to our nation’s aerial history.  WarBird aircraft are typically owned and maintained by individuals, museums, and/or flying clubs which are committed to honoring the legacy of our aviators. War Birds are commonly seen at air shows and many of them are still in excellent flying conditions.


Overhaul and Maintenance Expert: Ron Hollis

Ron-in-Hangar-300x225Ron Hollis is a man who’s been around and seen a lot of things in his 28+ years of experience in airplane overhaul and maintenance at Covington Aircraft.  He learned his trade working in Covington’s Radial Division as well as a stint working on his own as a Field Service Provider, selling Covington overhauled aircraft engines and accessories.  Ron came back to Covington in 1988 and assisted Covington Aircraft in an effort to diversify its overhaul services.  Research that he helped to conduct led the company to choose the Pratt & Whitney Canada PT6A series engine as an addition to its existing R-985 and R-1340 overhaul capabilities.  The company felt that the reputation of quality of the PT6A series engine aligned well with the reputation of quality at Covington Aircraft.  Ron served as Chief Inspector for the Radial Division and his personal commitment to quality helped the company to launch its Turbine Division in the mid 1990’s.  Ron says that Aircraft maintenance is not for the faint-hearted; it requires a strong commitment to quality!

Ron was sent by Covington to Pratt & Whitney Canada for factory training on a variety of PT6A turboprop engine models.  Ron said. “Learning the turbine engine was a radical change for me.”  It was a change he picked up extremely quickly, and it launched him down the path he’s on today.  Aircraft engine overhaul and maintenance has always been a joy to Ron and his time working with PT6A engines has been well spent.

Now, Ron has moved to helping with Covington Aircraft’s customer base with a new role as Customer Support Representative.  “This job affords me with a wonderful opportunity to work with people around the world,” says Ron.  Switching to an office position took some adjustment, but everyone at Covington is thrilled to have Ron working in such a vital capacity for the company.

Covington has been like a dream for Ron, who obtained his Pilot’s License from Letourneau University along with his A&P Mechanics license.  Covington Aircraft has given Ron the ability to work in the aircraft engine overhaul business; which he’s grown to love and appreciate.

Ron has been with the company for almost 29 years and his experience is a valuable asset to Covington.  As a company, Covington is working to use his experience in training others within the company to make sure the valuable knowledge, skills and experience Ron has accumulated over the years are not lost!

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