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Transport Canada defines it like this: http://www.tc.gc.ca/eng/civilaviation/regserv/cars/part5-standards-571s-1827.htm#571s_06 And they then provide a list of questions to help you decide if the repair or modification is major or minor...

Hi All, Does anyone have a link or other source for an English language version of Interstate Aviation Committee (IAC) AP-25 Airworthiness Regulations for Transport Category Aircraft? I understand that they are quite similar to FAR Part 25 but the devil is in the details as they say! Any...

I am very interested to hear how you make out with electronic signatures. Printed paper with actual pen signatures leads to a lot of photocopying and delays in distributing the repair data to who really needs it, the techs on the floor. What software are you planning on using for this? Our...

Thanks, bf109g. That's what I was thinking, diffucult to quantify the loss of strength. The original frame assy was not heat treated after welding. Various references show strength at the weld filler (5356) approaching the original strength of 6061-T6 without post weld heat treatment (38...

I have an existing equipment rack frame made from square 6061-T6 tube. We need to modify the frame geometry, so want to lengthen one tube. We intend to cut the tube between existing welded corner joints and splice in a longer tube. The rework will provide instruction to grind off all existing...

I am working on a bending analysis for a part made from 520.0 sand cast aluminum (T4 temper). I am having a hard time finding mechaincal strength properties for this material that will be acceptable for airworthiness certification purposes. Same for modulus of rupture curves or charts for this...