What is the certification basis for a Cessna 188 operated in the restricted category?

The certification basis for a Cessna 188 operated in the restricted category is indeed aligned with 14 CFR Part 21. This regulation outlines the general requirements for the airworthiness of aircraft, including those in the restricted category, which is typically used for agricultural operations, aerial firefighting, or other specific operations where particular restrictions apply.

When an aircraft is certified in the restricted category, it is subject to specific operational limitations and conditions that set it apart from those certified in the normal or utility categories. The use of 14 CFR Part 21 emphasizes the importance of meeting regulatory criteria during the certification process, ensuring compliance with safety standards that govern how restricted category aircraft are operated and maintained.

The other options refer to different parts of the Code of Federal Regulations that apply to specific categories of aircraft or operational standards but do not address the certification basis specifically for a restricted category aircraft as comprehensively as 14 CFR Part 21. Thus, understanding the role of Part 21 provides clarity on the certification framework applicable to the specific operational limitations of a Cessna 188 in the restricted category.