What category of airworthiness certificate involves "special experimental" status?

The special experimental category of airworthiness certificates is designated for aircraft that are used for specific research, development, or experimental purposes. This category allows flexibility for manufacturers, experimental test pilots, and institutions conducting research to operate aircraft that might not meet the standard airworthiness requirements due to their unique purposes. Experimental conditions under this category can include a variety of activities, such as testing new flight technologies, training, or even participating in airshows, provided that they meet certain safety procedures.

The other categories do not apply to experimental status in the same way. The standard category is for aircraft that meet all regulatory airworthiness standards for normal operations, while the restricted category is often for aircraft with limitations, such as agricultural or firefighting operations. The provisional category typically relates to temporary certification under specific conditions but does not encompass the broader experimental applications defined in the special experimental category. Understanding these distinctions helps clarify the purpose and regulatory framework for various types of airworthiness certificates.