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WTB: MS2001-5 piano hinge
Fri Aug 25, 2017 1:24 pm
I want to replace the 4 piano hinges on the elevator of my 235/320. As I am not too good with nutplates and that sort of thing, wondering if anyone would be willing to supply 4 complete hinges with nutplates as in the removed one here:
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Re: WTB: MS2001-5 piano hinge
Fri Aug 25, 2017 2:48 pm
Steve,
Why are you replacing the hinges?
If it is because the pivot is sloppy, have you tried using the 3/32" SS welding rod as a replacement pin. It is a much better fit than the original. All the pins should be replaced on the ailerons and flaps also (before they wear excessively).
Why are you replacing the hinges?
If it is because the pivot is sloppy, have you tried using the 3/32" SS welding rod as a replacement pin. It is a much better fit than the original. All the pins should be replaced on the ailerons and flaps also (before they wear excessively).
Re: WTB: MS2001-5 piano hinge
Fri Aug 25, 2017 3:01 pm
The hinge is likely too far gone if it had any time on the small, original pin.
http://www.n91cz.net/HingePlay/HingeRepair.pdf
http://www.n91cz.net/HingePlay/HingeRepair.pdf
Re: WTB: MS2001-5 piano hinge
Fri Aug 25, 2017 4:09 pm
Tom
I decided to replace the hinges because as Chris says they are too far gone for my comfort level in this critical area. First, on 2 of the hinges the painter removed some of the hinge material during polishing. Second, the nutplates were originally 8-32 threads but when the elevators were reinstalled by the painter he put 10-32 screws in some of the nutplates. Third, the original pins have developed some slop. I removed 2 of the hinges today and replaced the pins with 3/32 stainless welding rod as you mention and I have read on this site others have done. The slop is gone but the process of removal and replacement of a pin through a pinched hinge end took its toll and made me think replacement with new would be a better option, especially in light of the other issues cited above.
Thanks guys. I received a message from Brad. I plan to follow up with him.
I decided to replace the hinges because as Chris says they are too far gone for my comfort level in this critical area. First, on 2 of the hinges the painter removed some of the hinge material during polishing. Second, the nutplates were originally 8-32 threads but when the elevators were reinstalled by the painter he put 10-32 screws in some of the nutplates. Third, the original pins have developed some slop. I removed 2 of the hinges today and replaced the pins with 3/32 stainless welding rod as you mention and I have read on this site others have done. The slop is gone but the process of removal and replacement of a pin through a pinched hinge end took its toll and made me think replacement with new would be a better option, especially in light of the other issues cited above.
Thanks guys. I received a message from Brad. I plan to follow up with him.
Re: WTB: MS2001-5 piano hinge
Fri Aug 25, 2017 4:48 pm
When new hinge material is installed along with better fitting pins and annual maintenance is performed, they will last the life of the airframe without developed any play. (Technically I only have 18 years of data on this approach, but the trend projects to out to life time )
Annual Maintenance defined as: removing the pin, flushing hinges with LPS2 and reassembling.
Annual Maintenance defined as: removing the pin, flushing hinges with LPS2 and reassembling.