Cargo conversion

Cargo Conversion By Jeremy R.C. Cox May-June 1998 In the United States alone, over 360 billion dollars worth of goods are shipped via airfreight every year. This figure is going to increase exponentially well into the 21st century, as...


With these tests performed and the results recorded and sent to the ACO, if accepted, the ACO should now issue an STC to you. Once you have the STC issued to you, you can go to the next step and ask for a PMA letter to be issued from the ACO to allow you to approach your MIDO for your region to obtain a PMA. Normally, you would do this if you intended to sell the rights to the use of your STC to other entities, while you produce and supply kit parts for the modification. FAR 21 and its subparts cover the PMA process.

Now that you have an STC, your final signoff for return to service after incorporation of your cargo conversion will require a completed FAA form 337 that references your STC. As you can see, this article provides a very brief overview of a highly complex subject. To successfully design and certify a full cargo conversion, you will probably end up spending several million dollars on research, development, testing, certification, and tooling. For more information on receiving STC approval from the FAA, I suggest that you read all of the following reference material: FAR 21, 23, 25, 27, 29, 31, 33, 34, 35, and 36. Also FAA Orders 8110.4A and 8100.5.

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