How often should you check the drill-reamer for damage during operation?

The correct choice indicates that checking the drill-reamer for damage after every fifth hole is essential for maintaining the quality of the drilling process and ensuring safety. Regular inspection of the tool helps to identify any wear or damage that could affect the accuracy of the holes being drilled, which is critical in aerospace assembly where precision is paramount. By checking after every fifth hole, the operator can effectively balance operational efficiency with the need for oversight, preventing potential issues from escalating into more significant problems that could arise from using a damaged tool.

The rationale behind this frequency is to ensure that there is enough operational output before the tool is checked, allowing it to perform effectively while still maintaining the integrity of the assembly. Tools can sustain minor wear over a limited number of uses, and monitoring their condition regularly allows for timely replacements or repairs, thus ensuring that the assembly process adheres to safety and quality standards.