You should complete the Pre-application Statement of Intent (PASI) form and submit it to the FAA once your business plan becomes viable. Provide enough information in Box 10 of the PASI for the FAA to assess size and scope of your proposed operation.
When the CHDO is notified of your pending PASI, they will ensure that there is sufficient information to further process the pre-application. The completed PASI will be submitted to the FAA Certificate Holders District Office (CHDO) using the SAS External Portal.
When the PASI is acceptable, the FSDO manager will initiate the Certification Services Oversight Process (CSOP) found inFAA Order 8000.92, to determine the availability of resources to support the certification project. The CSOP assures that sufficient FAA resources are available to support you during the certification process.