bbakerco Posted January 7, 2020 Report Posted January 7, 2020 Hello all, Trim chain cover was removed at last annual and screws are nowhere to be found. I found the cover but what size are the 4 screws that hold the cover onto the assembly. It's a pretty flimsy piece of plastic and thinking of 3d printing something a bit sturdier. Related question, what is the proper lube for the trim chain? Thank you. Bryan Quote
Oldguy Posted January 7, 2020 Report Posted January 7, 2020 Here is what the IPC shows for a J trim chain cover. MS35206-226. Military Standard Machine Screw. Description: length: 1/4", thread: 6-32, pan head, cadmium plated carbon steel, coarse thread 1 1 Quote
ArtVandelay Posted January 7, 2020 Report Posted January 7, 2020 1 hour ago, bbakerco said: Hello all, Trim chain cover was removed at last annual and screws are nowhere to be found. I found the cover but what size are the 4 screws that hold the cover onto the assembly. It's a pretty flimsy piece of plastic and thinking of 3d printing something a bit sturdier. There is not that much room, so if you make it thicker it may interfere with the seats. Mine was missing completely when I bought my plane. Quote
bbakerco Posted January 7, 2020 Author Report Posted January 7, 2020 50 minutes ago, ArtVandelay said: There is not that much room, so if you make it thicker it may interfere with the seats. Mine was missing completely when I bought my plane. Correct, there's not. There's even wear marks on the current cover. Only talking about like 1/8" thickness. Quote
pwnel Posted January 7, 2020 Report Posted January 7, 2020 (edited) 3 hours ago, bbakerco said: Correct, there's not. There's even wear marks on the current cover. Only talking about like 1/8" thickness. Just get one from Plane Plastics. I replaced mine two years ago. It's a bit tricky finding the part on Plane Plastics but there are threads here on Mooneypace where we've discussed it before. It was less than $30 if I remember right. BTW if you read the latest MAPA log it again points out that a missing trim cover is a serious safety item. Edited January 7, 2020 by pwnel Quote
DonMuncy Posted January 7, 2020 Report Posted January 7, 2020 A hangar elf bent a an aluminum strip about 3/4 wide and 1/8 or less thick, into the same shape as the cover and epoxied (JB Weld or some such) on to the cover on mine. The screws through the aluminum do not wallow out the holes like plastic does. 3 Quote
M20F Posted January 7, 2020 Report Posted January 7, 2020 Just be like everyone else and use the biggest sheet metal screws you can find along with an impact drill :-) 1 Quote
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