This SAE Aerospace Recommended Practice (ARP) defines the wear limits allowed on certain features of Pressure Fuel Servicing Adapters which are crucial for safe interfacing of Pressure Fuel Servicing Nozzles and Pressure Caps. Wear limits as described herein represent the maximum amount of wear on certain features of the Adapter beyond which use of the Adapter for these purposes may contribute to an unsafe condition. Such wear is the result of the normal use of the Adapter for aircraft refueling and also, in some cases, for Nozzle stowage on refueling vehicles.

Purpose:

This document compiles inspection criteria to be applied to all Pressure Fuel Servicing Adapters in service. When aircraft Adapter wear goes unchecked, Pressure Caps may not seal properly. Of more concern, a Pressure Fuel Servicing Nozzle may be removed from a worn Adapter with the interlock features of the Nozzle defeated. The result of this condition can be the opening of the Nozzle when not attached to an Adapter and a potentially dangerous fuel spill.