True or False: If the edge break is less than the lowest allowable tolerance, it is acceptable to use the open countersink to deepen it.

The statement is true. Open countersinking is a technique used to ensure that fasteners sit flush with the surface of a material, achieving a smooth profile. When the edge break is less than the lowest allowable tolerance, it can potentially affect the structural integrity and performance of the assembly. By using open countersinking to deepen the edge break, the mechanic can correct the dimensional issue while still adhering to specified tolerances.

This process ensures that the necessary adjustments are made without compromising safety and performance standards, as deepening the countersink can accommodate any discrepancies within acceptable limits. This option promotes a practical approach to addressing manufacturing variances while maintaining compliance with aerospace industry regulations and standards.