Who is authorized to sign for fuel samples?

The correct answer is that a qualified aircrew shift supervisor is authorized to sign for fuel samples. This is because the shift supervisor is responsible for overseeing aircrew operations and ensuring that safety protocols and procedures are followed. Their training and experience provide them with the necessary knowledge to evaluate and verify fuel quality before it is used in aircraft, critical for maintaining operational safety and preventing potential damage to the engine systems.

Other options include individuals who may not have the required authority or expertise specifically related to fuel testing and safety protocols. For example, while any aircrew member could be involved in pre-flight operations, they often lack the specific qualifications needed to sign off on fuel samples. The maintenance officer typically handles maintenance-related tasks but is not necessarily involved in the operational side concerning fuel samples. A fuel technician does play a role in managing and monitoring fuel quality, but the signing authority usually resides with someone in a supervisory position, such as the aircrew shift supervisor, to ensure accountability and adherence to safety regulations.