swaltner
Active Member
Sorry about not providing any other info than, "that's wrong" on the original post. supersnoop is correct. The worst offenses are where the safety wire is attempting to loosen the bolt, not keep it tight. Here's an example of one that is attempting to loosen the bolt on the right. Based off the extra half-turn of wire right by the head, I think they had the loose wire originally wrapped on the right side of the bolt, saw that was wrong and flipped it to the other side of the bolt, but that's not really keeping this bolt tight. This piece of wire should have started on the right bolt, exiting that at the 4 o-clock position, come around the bottom of the bolt (on the orientation of this image) before heading to the bolt on the left.
I don't know if it's really a problem, but item that doesn't look right to me is how the wire isn't wrapped tight around all bolt heads. For the bolt on the right, I'd have the single wire wrapped around the right (far side) of the bolt and then the twisting start right next to the bolt at the lower-left. While unlikely, with the existing installation, the wire could slide in the bolt head, allowing the bolt to loosen.
I may not be explaining it very well, but AC 43.13-1B (Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair) from the FAA documents proper technique with several images starting on page 7-19. Of course, the example drawings in this book have bolts rotated at optimal orientation for installing safety wire. When properly torqued, the hole through the bolt head is usually in the least convenient location. I cursed at the airplane for 1-2 hours while trying to install 3 pieces of safety wire to hold the 6 bolts that attach the propeller to the engine.
http://www.faa.gov/documentLibrary/media/Advisory_Circular/Chapter_07.pdf
I don't know if it's really a problem, but item that doesn't look right to me is how the wire isn't wrapped tight around all bolt heads. For the bolt on the right, I'd have the single wire wrapped around the right (far side) of the bolt and then the twisting start right next to the bolt at the lower-left. While unlikely, with the existing installation, the wire could slide in the bolt head, allowing the bolt to loosen.
I may not be explaining it very well, but AC 43.13-1B (Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair) from the FAA documents proper technique with several images starting on page 7-19. Of course, the example drawings in this book have bolts rotated at optimal orientation for installing safety wire. When properly torqued, the hole through the bolt head is usually in the least convenient location. I cursed at the airplane for 1-2 hours while trying to install 3 pieces of safety wire to hold the 6 bolts that attach the propeller to the engine.
http://www.faa.gov/documentLibrary/media/Advisory_Circular/Chapter_07.pdf
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