Sealed Momentary Pushbutton Switch | 10A, 3 Terminal, Red M81714/672 No need to divert attention

No need to divert attention away from flying the aircraft

Open frame crimp tool

but the book also contains a chapter dedicated to helicopter instrument procedures

DMC Universal Positioner

which includes a story or motivation on why and how the maneuver is applied in actual flight

Sealed Momentary Pushbutton Switch | 10A, 3 Terminal, Red M81714/672 No need to divert attentionThe P1 offers a mechanical life that is well beyond the 50,000 cycles required by MIL PRF 8805. The dual break switching mechanism has an incredibly fast transfer time, reducing arcing and increasing contact life. The inherent wiping action breaks welds and scrubs the contacts clean on every actuation. The P1 switch offers vastly improved life under extreme conditions found in most military environments. Moistureproofing is accomplished in two ways.