What is the maximum duration for an investigation following a failure to meet ATP requirements?

The correct answer is 14 days, as it reflects the standard regulatory time frame set by the Federal Aviation Administration (FAA) for the investigation of situations where an individual has failed to meet the Airline Transport Pilot (ATP) requirements. This period allows the relevant authorities to conduct a thorough investigation to understand the reasons behind the failure and to determine any necessary corrective actions.

By establishing a 14-day limit, the FAA ensures that investigations remain timely and efficient, which is paramount in maintaining safety standards in aviation. A longer duration, such as 30 or 60 days, could potentially delay the resolution process and hinder the involved pilot's ability to return to flying or to complete any necessary remedial actions promptly. Thus, 14 days strikes an appropriate balance between thoroughness and timeliness in addressing ATP requirement deficiencies.