42.10.4.2.11 Loading and Unloading

Aircraft fuel servicing tank vehicles shall be loaded only at an approved loading rack. [407:6.2.11.1]

Aircraft fuel servicing tank vehicles shall not be loaded from a hydrant pit, unless permitted by the authority having jurisdiction under emergency circumstances. [407:6.2.11.2]

Filling of the vehicle cargo tank shall be under the observation and control of a qualified and authorized operator at all times. [407:6.2.11.3]

The required deadman and automatic overfill controls shall be in normal operating condition during the filling operation. [407:6.2.11.4]

The controls shall not be blocked open or otherwise bypassed. [407:6.2.11.5]

The engine of the tank vehicle shall be shut off before starting to fill the tank. [407:6.2.11.6]

To prevent leakage or overflow from expansion of the contents due to a rise in atmospheric temperature or direct exposure to the sun, no cargo tank or compartment shall be loaded to the point where it is liquid full. [407:6.2.11.7]

No cargo tank or compartment shall be loaded above the rated net capacity, as specified by the manufacturer's data plate. [407:6.2.11.7.1]

Space for thermal expansion, in no case less than 3 percent of the tank volume, shall be provided to prevent leakage. [407:6.2.11.7.2]

The driver, operator, or attendant of any tank vehicle shall not remain in the vehicle but shall not leave the vehicle unattended during the loading or unloading process be considered to be a part of the tank vehicle. [407:6.2.11.8]

Delivery hose, when attached to a tank vehicle, shall be considered to be a part of the tank vehicle. [407:6.2.11.8.1]

No fuel shall be transferred to or from any tank vehicle until the parking brake and wheel chocks have been set to prevent motion of the vehicle. [407:6.2.11.9]

Where loading tank trucks through open domes, a bond shall be established between the loading piping and the cargo tank to equalize potentials. [407:6.2.11.10.1]

The bond connection shall be made before the dome is opened and shall be removed only after the dome is closed. [407:6.2.11.10.2]

Drop tubes attached to loading assemblies extending into the vehicle tank shall extend to the bottom of the tank and shall be maintained in that position until the tank is loaded to provide submerged loading and avoid splashing or free falling of fuel through the tank atmosphere. [407:6.2.11.10.3]

Splash filling shall be prohibited. [407:6.2.11.10.4]

The flow rate into the tanks shall not exceed 25 percent of the maximum flow until the outlet is fully covered. [407:6.2.11.10.5]

Fixed drop tubes permanently mounted in the vehicle tank shall extend to the bottom of the tank or to the inside of the sump to maintain submerged loading and to avoid splashing of the fuel. [407:6.2.11.10.6]

The level in the tank shall be visually monitored at all times during top loading. [407:6.2.11.10.7]

A bonding connection shall be made between the cargo tank and the loading rack before any fuel connections are made and shall remain in place throughout the loading operation. [407:6.2.11.11.1]

The operator shall initiate fuel flow by means of a dead-man control device. [407:6.2.11.11.2]

The operator shall ensure that the automatic high-level shutoff system is functioning properly for each compartment shortly after flow has been initiated. [407:6.2.11.11.3]