4130 can't be OA welded?

wrote in message
...
| On Dec 29, 8:09 am, "Anyolmouse" wrote:
| wrote in message
|
|
...
| | On Dec 28, 6:28 pm, "Anyolmouse"
wrote:
| |
| | For many years that was the only approved method. Then along
came
| TIG
| | welding.
| |
| | American Champion has been using MIG for years now.
Quicker
| | and easier than TIG. But their tubing tends to be heavier, too,
which
| | makes MIG an easy option.
| |
| | Dan
| |
|
| I didn't know that it was approved for aircraft.
|
| It's approved by manufacturer's drawings. The manufacturer
| will call for welds as per their own welding specs, and those specs
| plus the airframe drawings are approved by the FAA. We sometimes find
| industrial hardware or other "uncertified" parts on airplanes, and
| they're approved by their presence on the drawings. For example,
| American Champion uses a cheap industrial clip nut on their cowling
| installations that has no locking feature and it's really soft so it
| cross-threads easily. And is forever falling off or sliding out of
| place. This is fixed using the minor modification provisions of the
| applicable country's aircraft maintenance laws, replacing those stupid
| things with real aircraft hardware.
|
| Dan
|
|

Thanks,

--
Anyolmouse

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