Before passengers can be carried in an aircraft that has been altered in a manner that may have appreciably changed its flight characteristics, it must be flight tested by an appropriately-rated pilot who holds at least a___.

The correct answer to the following question will be "Private Pilot Certificate".

Explanation:

A security pilot should possess at minimum one credential of a Private Pilot every 91. They begin with having a private pilot license, a clinical 3rd-class as well as 500 hours cumulative PIC period as well as climb up from everywhere based on what type of aircraft equipment concerned.Until travelers might be transported through an airline that has now been adjusted in a way that could have substantially modified its flight patterns, flight testing will be conducted out by a qualified pilot possessing at minimum a private pilot certificate.

So that above is the right answer.