flyingchump Posted February 3, 2021 Report Posted February 3, 2021 With alll the snow dumped on my airport and no why to taxi or fly, I started looking at photos I took while the plane was having so maintenance done. One of the photos caught my eye and noticed that none of the cylinder bolts have lockwire on them... Seems like something that should be lockwired, no? Quote
RLCarter Posted February 3, 2021 Report Posted February 3, 2021 I’ve never seen any with the Allen bolts safety wired, but then again I’m not an A&P Quote
Andy95W Posted February 3, 2021 Report Posted February 3, 2021 Safety wire on the internal hex nuts is not required. Those fasteners are unique to the Lycoming narrow deck engines. The later version wide deck engines use standard nuts and are also not safety wired. Good question, though. Quote
Greg Ellis Posted February 3, 2021 Report Posted February 3, 2021 Interesting photo though, my O-360 has torque marker on each of those. Don't see it in the photo. I guess it is not required. Quote
flyingchump Posted February 3, 2021 Author Report Posted February 3, 2021 3 minutes ago, Greg Ellis said: Interesting photo though, my O-360 has torque marker on each of those. Don't see it in the photo. I guess it is not required. The engine was last overhauled in 98, with a top in 2014. I'm betting any torque seal that was there blew away... Quote
Greg Ellis Posted February 3, 2021 Report Posted February 3, 2021 Just now, flyingchump said: The engine was last overhauled in 98, with a top in 2014. I'm betting any torque seal that was there blew away... Makes sense. Quote
flyingchump Posted February 3, 2021 Author Report Posted February 3, 2021 (edited) 37 minutes ago, Andy95W said: Safety wire on the internal hex nuts is not required. Those fasteners are unique to the Lycoming narrow deck engines. The later version wide deck engines use standard nuts and are also not safety wired. Good question, though. Thanks. Any idea where I can read about that? Would that be somewhere in the Lycoming IO360 owners manual? Edited February 3, 2021 by flyingchump Quote
RobertGary1 Posted February 3, 2021 Report Posted February 3, 2021 I would add torque paint to them for my own peace of mind. -Robert Quote
flyingchump Posted February 3, 2021 Author Report Posted February 3, 2021 42 minutes ago, RobertGary1 said: I would add torque paint to them for my own peace of mind. -Robert Agreed. My annual is in 2 weeks and plan on taking care of this. Quote
takair Posted February 3, 2021 Report Posted February 3, 2021 Mine do not even have the holes and I’ve never seen them safety wired. The overhaul manual and parts manual don’t show safety wire. You can read more in Lycoming SI1029. https://www.lycoming.com/sites/default/files/SI1029D Bolts%2C Crankcase%2C Tightening Procedures for Thru-Studs and .pdf 1 Quote
N201MKTurbo Posted February 4, 2021 Report Posted February 4, 2021 6 hours ago, flyingchump said: Thanks. Any idea where I can read about that? Would that be somewhere in the Lycoming IO360 owners manual? Look in the Lycoming overhaul manual. The latest version is dated 1976, but there are a zillion service instructions and service bulletins that expand on the manual. Quote
N201MKTurbo Posted February 4, 2021 Report Posted February 4, 2021 BTW, if you want to lock wire them, knock your lights out, it won’t hurt a thing. Quote
ragedracer1977 Posted February 4, 2021 Report Posted February 4, 2021 When lockwire just doesn't seem like enough..... 5 Quote
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