Who is authorized to inspect fuel samples?

The correct choice is the one that includes qualified aircrew, shift supervisors, CDI (Collins Designated Inspector), CDQAR (Collateral Duty Quality Assurance Representative), and QAR (Quality Assurance Representative) or QA (Quality Assurance). This reflects the standard practice within aviation maintenance and operations.

The individuals listed in the correct answer are specifically trained and qualified to perform inspections on fuel samples, ensuring that the fuel meets required safety and quality standards before being used in aircraft operations. This qualification is critical because fuel quality directly affects aircraft performance and safety. These personnel possess the necessary knowledge of inspection procedures, potential contaminants, and the implications of fuel quality issues, which is essential for maintaining operational readiness and ensuring the safety of flight operations.

The other groups mentioned in the incorrect options may not have the comprehensive training or authority to adequately assess fuel samples, making their involvement in such critical inspections not in line with standard safety protocols and procedures.