Hi. My name is Malich and I’m the Training/Planning Manager at InterConnect Wiring – where Connections Matter. Today we’ll be looking at how we make a HAD and what the symbols on them mean.
WIRING HARNESSES – AIRCRAFT REWIRING – COCKPIT PANELS – CONSOLE WIRING
HOW DO WE MAKE HADS? WHAT DO ALL THOSE SYMBOLS MEAN?
There are many ways to make a harness assembly drawing, otherwise known as a HAD, at InterConnect. But by far the most common way is to get a dimension drawing from our customer that has their own symbols, their own notes and their own special characters. Our job at InterConnect is to take that information and refine it so that we can make an InterConnect tab that is easier and more standardized for our assemblers to use.
Let’s take a look at the example on the table. So for an example of what we transfer to our HADs at InterConnect Wiring are these general notes, and this is information the assembler is going to use to manufacture their harness and that we believe is relevant. Not every note may be transferred, specifically parts subs may be left out, because it’s not helpful for the assembler. Once it gets to them, this is all they need to build.
Another example of information that we add to our harness assembly drawings (HADs) here are going to be our ref des’s, tubing sizes & connector orientation, noting that there’s a shrink ref des tubing at this location. Stuff like this is going to help our assemblers manufacture their harnesses in a better, faster way.
In this section of the HAD is where we really make it our own. We have our custom chart (or legend) that denotes our special colors, that our assemblers understand as well as our own symbols, including the cut line. One special place to note is the CUI (Controlled Unclassified Information) sticker that denotes the importance of this document, and how it should not be taken from the premises.
In another method to make a HAD at InterConnect Wiring is to dig up one of these. So this fossil is known as a mylar. These are really, really old pictures of a previously-designed formboard in which they used tape, notes and different kinds of methods to mark down exactly what the harness would look like and how it would be built. These are dimensions, so you can make a HAD at InterConnect off of this, but oftentimes we’ll elect to use these especially if we’re making a panel harness or something similar.
Thank you for watching. I’m Malich at InterConnect Wiring, where Connections Matter. Be sure to visit our website for more vlogs, blogs and updates.