Nylon tie straps should not be used in which three areas?

• A. Wheel Wells, Flaps, High Vibration
• B. Ailerons, Brakes, Cockpit
• C. Nose Cone, Tail Cone, Engine Compartment
• D. Cabin, Cargo Hold, Wings

Answer: (A)

Nylon tie straps are not suited for areas exposed to heat, constant movement, or heavy vibration because their performance degrades quickly under those conditions. In wheel wells, you have heat from brakes and potential fluid exposure from hydraulic lines or fuel/anti-ice fluids. The combination of heat, fluids, and rough service can weaken nylon, cause it to melt or lose strength, and allow tied components to shift or chafe.

In flap mechanisms, there’s regular motion and aerodynamic loading. A nylon strap can rub on moving parts, loosen, or interfere with hinge and actuation, which is unacceptable for surfaces that control airflow and aircraft attitude.

High-vibration zones subject the ties to repeated flexing. Nylon experiences creep and fatigue under vibration, so the strap can gradually loosen or snap, risking loose wiring or components and compromising system safety.

Because of these factors, use purpose-built, heat-resistant, vibration-rated fasteners in these areas instead of nylon tie straps.