The Continental A65 in my antique taildragger was last overhauled in 1981 and has less than 1000 hrs on it. One last thing Marc: If you are really curious how Continental increased the TBO on the O-470-U, I’d contact the company directly for specifics. O-470R TBO times. TBO times are impacted by many variables, most under the control of the owner/operator and his choices of maintenance and operation. I have read the endorsement placed on a LAMEs workshop policy recently regarding engines on condition, they would only cover the workshop liability up to 125% of engine life in hours or calendar time. In some cases, 400-hour TBO extensions can be approved. I see no reason to overhaul it as long as it's running well. So I understand TBO on the Lycoming O-360 is 2000hrs OR 12 years whichever comes first. Laurie Pre-takeoff checklist. The Time Between Engine Overhaul (TB In 2012, Continental Motors introduced its Gold Standard Factory Rebuilt and New Engines. It is merely a RECOMMENDATION that, hopefully, will better enable an operator to develop a safe, economic engine overhaul schedule. The Continental O-520 is a six-cylinder, horizontally opposed aircraft engine produced by Teledyne Continental Motors.First run in 1963 as a development of the IO-346, it has been produced in versions incorporating fuel injection (IO-520), turbo-charging (TSIO-520), and gearing (GTSIO-520 Discussion in 'Maintenance Bay' started by Laurie, May 29, 2007. If your engine is, in fact, an O-320-A2B manufactured in 1977 by Lycoming, it does have a 2,000 hour TBO time as set forth in Lycoming Service Instruction 1009AV. This TBO recommendation should in no way be considered a maximum TBO limit as it is possible to safely operate an R-1340 & R-985 past 1200 or 1400 hours TSO. So, what exactly is the TBO on an O-470R engine? I'd be willing to bet that less than 1% of owner flown airplanes have their engine(s) overhauled just because the calendar TBO … Joined: Feb 23, 2005 Messages: 411 Location: Paola, KS Display Name: Display name: Penguin. All 0-470 engines carry a TBO of 1500 hours except for many 0-470-Umodels. These engines incorporate improvements in technology and manufacturing processes that have allowed us to increase the TBO. In Service Instruction 1009, Lycoming recently announced the extension of TBOs by 200 hours for a significant number of Lycoming Factory New, Rebuilt and Overhauled engine models. Related posts: CONTINENTAL.AERO The 550 series includes 550 in3 models in either naturally aspirated or turbocharged configurations. TCM SB #M89-13 (note four) is very specific about which-U engines hold a 2000-hour TBO and what requirements must bemet to allow for the extension on other -U engines. What are your thoughts on engines that were overhauled … With the right combination of thrust and efficiency, our 550-series engines are powering some of the most successful and high performing aircraft in general aviation history like the Cirrus ® SR22T and Beechcraft

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