News 2020 31 March, 2020 Deviation from OTAR Part 121 - Commercial Air Transport Operations - Large Aeroplanes Deviation from OTAR Part 121.1115(a) - Operator Proficiency Checks (OPC) / 121.1120(a) - Operator Line Checks (OLC) / 121.1125(a) - Safety and Emergency Procedures Checks (SEPC) / 121.1155 - Cabin Crew Competency Checks ‹ All News Stay informed 2024 Sign up for news alerts ›