The purpose of this AC is to inform the aviation industry that operators must obtain a Special Authorization (SA) in order to conduct instrument approach procedures (IAPs) which require a missed approach climb gradient greater than 425 feet per nautical mile (ft/nm). The final step in this operational approval is the issuance of the SA Instrument Approach Procedures - Missed Approach Climb Gradients Greater than 425 ft/NM to an air operator, foreign air operator, or private operator.