What should be done with equipment not permanently installed in the aircraft before weighing?

For accurate weight and balance calculations, all equipment that is not permanently installed in the aircraft must be removed before weighing. This ensures that the weight measurements reflect only the fixed components of the aircraft and provide a true representation of the aircraft's empty weight. Equipment that can be added or removed can significantly alter the aircraft's weight distribution and overall performance characteristics, making it essential to exclude such items when determining the aircraft's basic weight.

In aviation maintenance and operations, maintaining precise weight and balance is critical for safety and performance. If equipment remains in the aircraft, it could lead to inaccurate readings that compromise flight safety. Therefore, removing non-permanently installed equipment is the correct procedure to ensure the integrity of the weighing process.