A-2) … the International Air Transport Association (IATA) raised concerns that the allocation of 16 characters to PBN/ in Item 18 may not be sufficient to adequately record the number of PBN approvals in some instances of long haul flights through a multitude of differing RNP airspaces. IATA would investigate this matter more fully and inform the next meeting of the outcomes.

The maximum number of possible combinations is 28 characters. This is possible if one aircraft is capable of most PBN operations with some capabilities only provided by specific sensors. The new provisions cover a representative subset to support a long-haul flight. Typical capabilities will be covered by 16 characters. The intent of IATA to investigate further is noted.