30 Questions
What can happen if an aircraft tire flexes beyond design limits?
Excessive heat build-up weakening the carcass construction
Why must vent holes in the lower outer sidewall of tires be kept unobstructed?
To release seepage of inflation gas trapped in the plies
What is the purpose of seepage holes in tube-type tires?
To allow air trapped between the tube and the tire to escape
Why is it important to check and maintain tire pressure within the proper range?
To keep temperature within limits and prevent structural damage
What can happen if gas trapped in the plies of a tire expands with temperature changes?
Cause separation of plies weakening the tire
Why is a limited amount of heat able to be handled by any tire?
Beyond this point, structural damage occurs
What is the effect of a 50°F difference in ambient temperature on aircraft tire pressure?
Causes a 10% reduction in tire pressure
What problem can occur if an aircraft lands with underinflated tires?
Tire damage due to over-temperature from flexing beyond design limits
Why should aircraft tires not be under inflated beyond the allowable limit provided in the maintenance data?
To prevent overheating
What is a consequence of severely underinflated aircraft tires?
Pinching the sidewall between the rim and the runway
What is a problem associated with over inflation of aircraft tires?
Reduced adherence to the landing surface
What happens to a severely underinflated tire in a dual-wheel setup?
Affects both tires and both should be replaced
What is the acceptable limit for exposed reinforcing or protector ply in a tread groove crack in an aircraft tire?
Less than 1/4 inch
What can groove cracks in tires lead to?
Undercutting of the casing outer ply
When should a tire be removed from service due to tread chipping and chunking?
If more than 1 square inch of reinforcing or protector ply is exposed
What causes chevron cuts in aircraft tires?
Operation on grooved runway surfaces
How should a contaminated tire be handled?
Remove from service immediately
How can tires be protected from degradation due to ozone and weather?
Cover them during maintenance in the landing gear area
What is a crucial step to ensure the wheel assembly is serviceable before mounting a tire?
Examining the bead seat area for defects
Why should the O-ring on a wheel assembly be lubricated and in good condition?
To seal the wheel for the entire life of the tire
What important information should be visible on the sidewall of a tire intended for aircraft application?
Ply rating and speed rating
Why is it important to visually inspect a tire for damage from shipping and handling?
To identify any permanent deformation or cuts
Why are tire beads sometimes lubricated when mounted on aluminum wheels?
To ease the mounting process and ensure proper sealing
What should be done to the tire bead area before mounting a tire on a wheel assembly?
Clean it with soap and water or denatured alcohol
What must be in good condition and lubricated to seal for the entire life of a tubeless tire wheel assembly?
The wheel half O-ring
What is recommended as the minimum distance for regulating inflation pressure during the initial inflation of an aircraft tire?
30 feet
What should be introduced gradually during the initial inflation of an aircraft tire to prevent corrosion?
Dry nitrogen
What is the next step after observing any issue in the tire when inflating it on the wheel rim?
Depressurize the tire before approaching it
What is typically done to aircraft tires after inflating them to their full specified operating pressure?
Allowed to remain with no load applied for 12 hours
What should precede the mounting of any tire, including tube-type tires?
Wheel and tire inspection
Test your knowledge on aircraft tire maintenance by identifying acceptable levels of cracking, bulges, tread chipping, and chunking that indicate the need for removal from service. Understand the importance of exposing reinforcing or protector ply and the risks associated with groove cracks and tread separation.
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