The FAA has published revised Information for Operators 23001, which offers expanded guidance about which aircraft approach categories should be used for instrument procedures. It emphasizes that approach categories for either Vref, if specified, or 1.3 Vso are determined at maximum certified landing weight even if the actual landing weight is lower. “The certificated approach category is permanent and independent of the changing conditions of day-to-day operations,” the FAA said.
Further, “aircraft may not be flown to the instrument approach minima of a slower approach category.” If it becomes necessary to operate above the upper limit of the speed range of an approach category, the minimums for the higher category should be used if available. Regardless of approach category, the pilot must maneuver the aircraft to stay within the protected area for that category to achieve obstacle and terrain clearances.
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