Preventive maintenance of tyres and proper tyres inspection can save lots of maintenance costs and increases the life of tyres. For the reason that here I’m discussing 10 easy ways to improve tyre performance and protect against wear.
Check tyre inflation pressure daily
Daily pressure checks are critical because aircraft tyre assemblies can lose as much as 5% of inflation pressure in 24 hours. Before placing wheel assembly into service, perform a 24 hour pressure retention check to ensure that the wheel assembly is holding pressure properly. Aircraft tyre pressure must be checked when the tyres are cool (at ambient temperature) because heat generated during taxis, takeoffs and landings can result in elevated pressure readings. Always allow 2 hours cooling time.
Remove tyres that are more than 10% underinflated
Under-inflation greatly increases tyre stress in service, wearing the tyre shoulder area faster and damaging the tyre inner liner.
Avoid Over Inflation of Tyre
As it often leads to uneven tread wear and reduced traction, making the tread area more susceptible to cuts and placing greater stress on aircraft wheels and landing gear.
Wait 12 hours before putting new tyres in service after initial inflation
All tyres will stretch after the initial inflation, causing a volume increase and thus a drop in pressure. Tyres should not be placed in service until they have been inflated for a minimum of 12 hours. The tyre pressure should then be checked and inflate tyre, if necessary.
Recheck inflation after 24 hours
After the 12 hours stretch period to make sure the assembly is still holding inflation properly. This is especially important for tubeless assemblies, because they can lose pressure from multiple locations, such as the wheel valve, o-ring, fuse plug, over pressure plug, wheel cracks and similar areas.
Minimize vibration with proper tyre and wheel assembly
All tyres are balanced at the factory. The red balance dot on the sidewall is to be aligned with the inflation valve for optimum tyre and wheel assembly balance with less vibration. Gear misalignment, worn or loose gear components, improperly torqued axle or wheel nuts, flat-spotted tyres, and similar problems can cause vibration on an aircraft.
Avoid the No. 1 cause for early tyre removal – Foreign Object Damage
By diligently clearing all foreign objects from ramps and hangar floors, damage due to foreign objects can be reduced. Even something as innocuous as a washer can cut a tyre that is under heavy load.
Remove damaged tyres if fabric ply cords are visible
If cords are visible or cord exposure exceeds acceptable limits, tyre should be removed. Cuts, cracks and other conditions may require removing the tyre from service.
Examine tyres for uneven wear and correct the cause
Such as gear misalignment or improper tyre inflation. Tyres with camber induced asymmetric wear can be demounted and mounted in the reverse direction to extend the life of tyre.
Remove tyres when tread is worn to the base
Tred wear to base or of any groove at any spot or to the depth stated by the aircraft manufacturer. This require removing the tyre from aircraft.