What is the purpose of the tire and wheel assembly inspection during maintenance?

• A. To replace tires and wheels on board.
• B. To adjust landing gear alignment.
• C. To test braking system hydraulics.
• D. To detect wear, damage, leaks, runout, abnormal wear patterns, and to verify proper torque on wheel nuts.

Answer: (D)

The main idea is to ensure the wheel-tire system is in good condition and securely fastened, because problems here can lead to sudden tire failure or wheel separation. During the inspection, you look for wear or damage to the tire such as cuts, bulges, or tread depth that’s too shallow; sidewall cracks or other tire abnormalities; leaks at the bead, valve stem, or around the wheel; cracks or corrosion on the rim; and unusual wear patterns that may indicate improper inflation, misalignment, or bearing issues. You also check runout, the wheel's wobble as it spins, since excessive runout can cause vibrations, uneven wear, and braking issues. Verifying the torque on the wheel nuts is crucial to make sure the wheel remains firmly attached; if the nuts are too loose, the wheel could detach, and if they’re too tight, you risk damaging threads or the wheel itself. All of this work is about safety and reliability, catching issues before they become a problem.

Replacement of tires and wheels can be a response to findings from the inspection, but the purpose of the inspection itself is to assess condition and mounting, not to perform replacement. Adjusting landing gear alignment and testing braking system hydraulics are separate tasks focused on geometry or brake hydraulics, not on the condition and secure mounting of the tire and wheel assembly.