What is the validity period for a proficiency check or line-oriented simulator training for flight crew members?

The validity period for a proficiency check or line-oriented simulator training for flight crew members is 24 calendar months. This timeframe is established to ensure that flight crew members maintain their skills and competencies in operating aircraft safely and effectively. The regular renewal requirement is crucial because aviation is a highly dynamic field where procedures, regulations, and technology can change rapidly.

A 24-month period allows for a reasonable balance between ensuring crew proficiency and accommodating varying operational schedules that may limit training opportunities. Therefore, it is critical for both safety and regulatory compliance that flight crews undergo proficiency checks within this specified timeframe to ensure ongoing capability and familiarity with flight operations.