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Safety cables and shoulder harnesses for an L-2?

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  • Safety cables and shoulder harnesses for an L-2?

    I've seen safety cables on the landing gear of an L-2 before but don't know what paperwork was needed or where they came from. I'm also looking to install some shoulder harnesses on an L-2A. If you have information on either of these, please let me know where to look!
    Ryan Short, CFI, Aerial Photographer
    Former Taylorcraft BC-12D owner - hopefully future owner as well.
    KRBD and KGPM - Dallas, TX
    TexasTailwheel.com

  • #2
    There is an FAA letter issued a few years ago which allows the installation of shoulder harnesses in older aircraft without much more than a log book entry under the FAA's philosophy that safety enhancing equipment should be encouraged without the requirement of massive paperwork.
    I have a copy of that letter in my computer files, but am unable to find it this evening. Perhaps other responders will be able to provide you a copy.
    Larry Wheelock BC12D and Stinson 108 and Mooney M20C

    Comment


    • #3
      Originally posted by lawheelock View Post
      There is an FAA letter issued a few years ago which allows the installation of shoulder harnesses in older aircraft without much more than a log book entry under the FAA's philosophy that safety enhancing equipment should be encouraged without the requirement of massive paperwork.
      I have a copy of that letter in my computer files, but am unable to find it this evening. Perhaps other responders will be able to provide you a copy.
      Larry Wheelock BC12D and Stinson 108 and Mooney M20C
      I'm familiar with the letter. Guess I'm more interested in what folks have chosen to install...
      Ryan Short, CFI, Aerial Photographer
      Former Taylorcraft BC-12D owner - hopefully future owner as well.
      KRBD and KGPM - Dallas, TX
      TexasTailwheel.com

      Comment


      • #4
        Ryan,
        I'll try to take some pictures of my installation. It attaches to the seat frame. No tools needed to install. Mine came with the airplane for the front seat only. My airplane doesn't have a swivel back seat, it had been replaced by using another front seat. I had a matching harness made for that seat as well and it was pretty easy and inexpensive, If you have the swivel seat I don't know if what I have will work for it.

        Bob Picard
        N48923 Taylorcraft L-2B Skis/Wheels
        N6346M Stinson 108-3 Floats/Skis/Wheels
        Anchor Point, Alaska
        Bob Picard
        N48923 L-2B Skis/Wheels
        N6346M Stinson 108-3 Floats/Skis/Wheels
        Anchor Point, Alaska TF#254

        Comment


        • #5
          So I found out where the safety cables we had on the old Taylorcraft I used to fly were from: http://www.fadodge.com/safety-cables-for-mlg-std/ but I need to figure out how they did the approval for them. Wonder if they 337d it or had some sort of field approval?
          Ryan Short, CFI, Aerial Photographer
          Former Taylorcraft BC-12D owner - hopefully future owner as well.
          KRBD and KGPM - Dallas, TX
          TexasTailwheel.com

          Comment


          • #6
            Originally posted by n6346m View Post
            Ryan,
            I'll try to take some pictures of my installation. It attaches to the seat frame. No tools needed to install. Mine came with the airplane for the front seat only. My airplane doesn't have a swivel back seat, it had been replaced by using another front seat. I had a matching harness made for that seat as well and it was pretty easy and inexpensive, If you have the swivel seat I don't know if what I have will work for it.

            Bob Picard
            N48923 Taylorcraft L-2B Skis/Wheels
            N6346M Stinson 108-3 Floats/Skis/Wheels
            Anchor Point, Alaska
            Are they mounted above your shoulders? If not you need to move them. If you get in a wreck and they are too low, you will get spinal compression.
            N29787
            '41 BC12-65

            Comment


            • #7
              Originally posted by RyanShort1 View Post
              So I found out where the safety cables we had on the old Taylorcraft I used to fly were from: http://www.fadodge.com/safety-cables-for-mlg-std/ but I need to figure out how they did the approval for them. Wonder if they 337d it or had some sort of field approval?
              Why do you need approval for those? Just put them on and fly it. It is normal equipment.
              N29787
              '41 BC12-65

              Comment


              • #8
                Tim, Ryan,

                They are Piper cables that I see in the link.

                But I am wondering if in fact L2's had or even needed safety cables.

                Isn't the bungee assembly extension mechanically limited by the way it's made?

                Or am I remembering it wrong?

                I only worked on a handful of them.

                Dave

                Comment


                • #9
                  Attached to a welded tab on upper structure.
                  Click image for larger version  Name:	20190513_132015.jpg Views:	2 Size:	123.1 KB ID:	182677Click image for larger version  Name:	20190513_131958.jpg Views:	3 Size:	131.6 KB ID:	182678

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                  • #10
                    Originally posted by sully View Post
                    Attached to a welded tab on upper structure.
                    Click image for larger version Name:	20190513_132015.jpg Views:	2 Size:	123.1 KB ID:	182677Click image for larger version Name:	20190513_131958.jpg Views:	3 Size:	131.6 KB ID:	182678
                    that welded tap would have to have a 337, if you just wrap the harness around the tube, its a logbook. that depends on if that tab is original, if not, it needs paperwork because it was welded.
                    N29787
                    '41 BC12-65

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                    • #11
                      Isn't there something about not putting the load in the center of the tube also, I know on mine I was told to put it at one corner of the other, I put it at both ends

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                      • #12
                        there is no need for saftey cables. the 2 halves have a bolt in the slide tube.

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                        • #13
                          Originally posted by Ragwing nut View Post
                          there is no need for saftey cables. the 2 halves have a bolt in the slide tube.
                          Can we agree to disagree??? This was about a decade ago and was why a certain aircraft I used to fly had them installed. I wasn't on board when this happened.
                          Attached Files
                          Ryan Short, CFI, Aerial Photographer
                          Former Taylorcraft BC-12D owner - hopefully future owner as well.
                          KRBD and KGPM - Dallas, TX
                          TexasTailwheel.com

                          Comment


                          • #14
                            I can't speak with experience regarding Taylorcraft gear, but can regarding PA-11, 12, 18 with similar bungee and maybe added shock absorbing elements. Especially the -11 with no shock absorber. Just a piece of leather plug at the end of the bungee travel before the attachment hardware goes into shear test.

                            Safety cables of metal or synthetic non-stretch line can save the day. If the weak point is a shear susceptible fastener or cords then bracket that with a backup. Or experiment to see what loads will create a failure.

                            Gary
                            N36007 1941 BF12-65 STC'd as BC12D-4-85

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                            • #15
                              Originally posted by RyanShort1 View Post

                              Can we agree to disagree??? This was about a decade ago and was why a certain aircraft I used to fly had them installed. I wasn't on board when this happened.
                              Eek, that, hurt (referring to the picture).

                              Seems like the system would have been designed to handle the load when the bungee broke.

                              Makes one wonder about the condition of the slides and if they ever got inspected for damage, wear or proper assembly.

                              Certainly a safety cable would have been a nice thing to have.

                              I have landing gear snare cables on my Champ, not required but a good idea.

                              Dave

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