The 100 hour Radial Engine Annual Inspection Series – Valve Adjustments

This is the second topic in the series about the 100 hour / annual inspection. This series focuses on maintenance performed during an effective 100 hr. Inspection on R1340 and R985 engines:

  1. Oil Change with filter/screen & sump checks.
  2. Valve adjustment – Positive or compression.
  3. Ignition timing check – Spark plug servicing.
  4. Compression check – differential.
  5. Air filter and carb – heat system check.
  6. Fuel System Screens.
  7. Cylinder Head Checks.

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The T-6 Texan: Then and Now

Since it was first produced in 1937, the T-6 Texan and its offshoots have filled many roles for many different institutions in dozens of countries. It proved to be one of the more enduring, durable, and useful aircraft ever designed, and that’s further evidenced by the evolution in the 1990’s of the Beechcraft T-6 Texan II, which is a modern version of the original WWII trainer.

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Covington Aircraft Oshkosh & KidVenture Wrap Up

This year since we sponsored the KidVenture pavilion, we were considered KidVenture Volunteers. It was quite a different experience from being just an exhibitor as we have been in years past. We really felt like we were more a part of the show. AirVenture is run by over 4,000 volunteers, working many hours to ready the grounds for this annual event. All of the EAA staff were so kind and hard working from the ground up including bus drivers to gatekeepers, and all the way up to the business development office and executive directors.

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The 100 hour Radial Engine Annual Inspection Series – Part 1

It’s annual inspection season again. I guess it like death and taxes…sure to come around. Lots of folks have asked “what should I have done to my engine during the annual?” The engine maintenance manual, part number 118611 contains the Periodic Inspection Tables listing the Requirements for the “A” (50 hr), “B” (100 hour inspection), “C” (200 hour) and “D” (Midway to Overhaul) inspections on R1340 and R985 engines. Of the requirements listed I’d like to offer some recommendations on seven of the “heavyweights”.

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Understanding Fuel Contamination in the PT6A

The customer had sent in an exchange set of fuel nozzles at his normal change interval of 300 hours. The nozzle set appeared to be reasonably typical in appearance; however, every one of the nozzles exhibited streaking during the spray check as received! Nine of the nozzles cleaned up during the cleaning process and spray checked ok. Five nozzle tips had to be replaced to be able to return the set to service. This was unusual for this operator, and he sought for ideas as to what might be the problem.

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PT6A Engine Maintenance: Basic Stuff, Compressor Bleed-Off-Valve!

The PT6A engines bleed valve lives a tough life! Its job is to get rid of excess air pressure generated by the engine compressor’s first three stages at lower RPMs or power settings. If it doesn’t do its job, the compressor can stall, emitting loud bangs when the pilot tries to accelerate the engine or reduce power, perhaps on approach! If it fails completely, large amounts of power can be lost, even enough to result in off airport landings!

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Protecting One of Your Largest Investments In Your Aircraft? Maintaining the PT6A

While this article is primarily all about what you do with your LARGE PT6 engine during the off season, the very first paragraph or two will cover a couple of other “Nice to Know” topics.  Large in this article relates to PT6A-60AG, -65AG, -67AG, -67F and any other model with a -60 series engine installed, like a -67R, -65B, -67D etc.   If there’s a 6 as the first number of your engine model…this article is for YOU.

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