Who can replace a seatbelt under Part 91 with a Letter of Deviation Authority from Part 125?

The correct answer focuses on the specific regulations and requirements regarding maintenance and safety equipment in aviation. Under Part 91, for a seatbelt replacement to occur using a Letter of Deviation Authority from Part 125, that work must be performed by an individual who is specifically designated in writing by the maintenance organization responsible for the aircraft.

This designation ensures that the task is executed by someone who is familiar with the organization’s standards and practices, thereby maintaining safety and regulatory compliance. The process underscores the importance of accountability and traceability in aviation maintenance, as it assures that only qualified personnel, who have been properly vetted and authorized, can perform critical safety-related tasks like replacing seatbelts.

Other options provided do not fit within the established regulatory framework. For instance, while an FAA certified technician may have qualifications, they must still be formally designated by the maintenance organization for specific tasks under this authority. Similarly, a licensed pilot in command or a maintenance supervisor, regardless of their experience or credentials, would not inherently have the authority to replace a seatbelt without the necessary written designation unless they are part of the maintenance organization’s approved personnel list.