API IP RP 1597 pdf download.PROCEDURES FOR OVERWING FUELLING TO ENSURE DELIVERY OF THE CORRECT FUEL GRADE TO AN AIRCRAFT
There are many documented cases of misfuelling and a variety of causes have been identified. In the majority of these incidents there was a lack of grade confirmation, meaning that the fuelling staff did not confirm with the customer the grade of fuel required. There are many similar looking aircraft in operation internationally. Examples include – Piper Mirage (avgas) and Piper Meridian (jet fuel), Cessna 404 Titan (avgas) and 441 Conquest (jet fuel) – where visual appearance alone cannot be relied on to identify which grade of fuel the aircraft requires. Greater numbers of diesel powered aircraft are now being manufactured and in some cases existing aircraft with spark ignition piston engines are being converted to diesel engines. Aircraft fitted with diesel engines are very similar in appearance to aircraft fitted with spark ignition piston engines making visual identification very difficult. In addition, the filling ports on modified aircraft may not have been replaced with the larger diameter airframe fuelling port associated with aircraft requiring jet fuel. The consequences of fuelling these aircraft with avgas can be catastrophic. In some cases, grade confirmation did occur and wing decals were fitted on the aircraft, but the refuelling vehicle/dispenser cabinet used contained the wrong grade of fuel. Clearly there is a need for a comprehensive set of procedures to address the many possible causes of misfuelling.
Refuelling staff shall obtain verbal confirmation of the fuel grade from the pilot for all overwing fuellings. In certain situations (sections 2.3 to 2.5), written confirmation is required. Under no circumstances shall refuelling staff assume what grade of fuel is required. Instructions to or between refuelling staff relating to overwing fuelling shall always include a reference to the grade of fuel required. This shall apply at all stages: receipt of orders, transferring orders onto notice boards and in all verbal communications. Overwing nozzles shall be colour-coded; black for jet fuel and red for avgas (see section 2.8). Jet nozzles shall be fitted with selective spouts (see section 2.5). Where wing decals are not present on the aircraft, the fuelling shall not proceed unless a Fuel Order Form is completed by the customer. For full details of these procedures, refer to sections 2.2 to 2.10.
2.2.2 Written records
All verbal orders shall be recorded, including grade, quantity of fuel to be delivered into each aircraft fuel tank and aircraft registration information. The only exception is for verbal orders received on the apron with the fuelling completed immediately following. The recording of verbal orders and their transmission within the refuelling and associated site staff is critical in ensuring that the correct fuel grade and quantity are delivered. The use of customer confirmation records (i.e. meter tickets and other documentation that are used routinely to initiate normal fuelling or billing processes) shall not be confused with the use of the Fuel Order Form. The Fuel Order Form is used only under certain conditions (see section 2.4). The use of the Fuel Order Form shall be on an exception basis and not used routinely so as to highlight the importance of this non- routine task in delivering the correct grade of fuel to the aircraft.
2.2.3 Grade/product names
Standard product names shall be used by all site staff to avoid confusion. It is not uncommon for customers to use unusual or abbreviated product names which can lead to confusion. This is particularly apparent where customers have operated internationally 1 or may only use one grade of fuel in their fleet and may not be aware of the importance of grade confirmation. Orders received from customers (or from instructions relayed via other members of staff) which do not use these product names shall be clarified. Orders such as “aviation fuel” or “gasoline”, etc., have the potential to cause the delivery of the incorrect grade of product. Refuelling staff shall only accept verbal fuel grade notification from the customer when there are wing grade decals fitted adjacent to the fuelling point of each aircraft fuel tank to be filled.