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Posted

Got the same thing.  The extension is in the footnotes to the Service Letter.  Problem is, you would have to get a new engine to get the extension.  It applies to, "serial number 1006000 and higher... ."

Posted

LOL......all marketing hype ......TBO is just recommended.....you and your mechanic are responsible for making the determination if the engine is in good working order......the industry should be more honest and advise on real world experience like a TSIO 360LB needing a top at mid-time and a TSIO550 sheldom making more than 750 if flow in the FLs.  I am always amazed how naive new Pilots assume a mid-time engine with good compressions should last another 800 hrs etc (me when I bought my 231 in 1992).   TBO = Totally Bogus Objective!

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Posted

Got the same thing.  The extension is in the footnotes to the Service Letter.  Problem is, you would have to get a new engine to get the extension.  It applies to, "serial number 1006000 and higher... ."

 

Mostly this is a technical detail not super important for part 91 since we can run our engines on service. And indeed my TSIO520NB just got new cylinders at 985 hours, well before TBO as co2bruce was alluding.  As for the lowers, fingers crossed that they will make the old TBO number and beyond - again based on in service monitoring the big five - oil analysis and consumption, filter analysis, engine monitoring indications, compression testing, regular borescope, performance/power.

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