The rotorcraft is a representative high-tech aggregate with high technical difficulty and added value, and the development of civil-military helicopters continues because it has superior technology compatibility between civil and military compared to other aircraft. Airworthiness certification is a process of verifying that aircraft development and modification have the safety and reliability suitable for flying, such as structure, strength, and performance, and is a gateway that must be experienced when developing an aircraft. During the airworthiness certification stage, proof of key technology fields are made to determine whether flight safety is secured during the design stage, and strict verification of freezing is required. Accordingly, it is very important to set standards for airworthiness certification related to freezing, but related research is insufficient. In this study, the criteria for airworthiness certification and demonstration cases of Surion aircraft, a representative military rotorcraft, were considered. The results of this study can be used as a guideline for identifying and proving freezing airworthiness certification standards for future rotorcraft development projects, and it is expected to contribute to the development of rotorcraft with flight safety in terms of ice protection.