Who is responsible for in-service weighing of an aircraft?

The operator is responsible for the in-service weighing of an aircraft to ensure that it is within the specified weight limits for safe operation. This responsibility is outlined in various regulatory frameworks and operational guidelines which state that the operator must track the weight and balance of the aircraft throughout its operational life.

Regular weighing is crucial, especially after modifications, repairs, or significant changes in equipment that could affect the aircraft's weight. The operator coordinates these weighings and maintains accurate records to comply with safety standards and regulatory requirements, thus ensuring the aircraft can be operated safely within its prescribed limits.

While the maintenance team may assist by providing support for the weighing process, the overall responsibility falls on the operator to ensure that the weighing is conducted according to proper procedures and that the data is accurately recorded and managed. Other roles, like the pilot's or the aviation authority's, typically involve oversight and compliance checks rather than directly conducting the in-service weighing.