What type of drill motor is specified for drilling the pilot holes?

The correct choice for drilling pilot holes in aerospace applications is the pistol grip drill motor. This type of drill is designed for ease of use and precision, which are critical when working on aircraft assembly.

The pistol grip design allows for a firm and controlled grip, enabling the technician to apply the necessary pressure while maintaining stability. This is particularly important during the drilling process, where any deviation could lead to improper hole placement or damage to the surrounding materials.

Pistol grip drill motors typically offer variable speed settings, which provide additional control over the drilling process, making it suitable for creating clean and accurate pilot holes needed to guide larger drill bits safely.

In contrast, other drill types, like electric drills, might not offer the necessary control or suitability for precision tasks required in aerospace work. Hammer drills and rotary drills are more appropriate for heavy-duty applications, such as drilling into concrete or masonry, which is not a standard requirement in aircraft assembly. Hence, the pistol grip drill motor stands out as the preferred option for drilling pilot holes due to its versatility and precision.