What is a Letter of Authorization (LOA) used for?

A Letter of Authorization (LOA) serves as a formal document that outlines the approval for specific maintenance actions on an aircraft. In the context of aviation maintenance, it is typically used to grant approval for repairs or modifications that can be performed by an appropriately trained mechanic. This ensures that the individual performing the work has the necessary skills and qualifications to complete the task effectively and safely.

In the scenario of option B, the LOA authorizes an intermediate trained mechanic to carry out specific repairs on an aircraft. This is an essential aspect of aviation safety and regulatory compliance, as it helps maintain the integrity of the aircraft while ensuring that only qualified personnel are engaged in maintenance tasks.

Other options, while related to aviation, do not accurately reflect the purpose of a LOA. For instance, assigning a mechanic permanently to an aircraft does not involve a formal authorization process like an LOA; instead, it is typically managed through employment contracts and personnel regulations. Approving flight operations of new aircraft and providing funding for aviation projects fall under different regulatory frameworks and documentation processes unrelated to the LOA's specific function. Thus, the correct understanding of what a Letter of Authorization is used for centers on its role in authorizing authorized repairs by appropriately qualified mechanics.