BASE OF TREAD GROOVE
TREAD FLAT SPOTS
FLAT SPOT ICE SKID BURN/TREAD RUBBER REVERSION
TIRES WITH FLAT SPOTS ARE NOT SERVICEABLE IF TIRES WITH ICE BURN/TREAD RUBBER REVERSION THE FLAT SPOT EXPOSES THE TREAD REINFORCEMENT ARE NOT SERVICEABLE IF THE DAMAGE EXPOSES OR CUT PROTECTOR PLIES OR TIRE BALANCE AFFECTED. THE TREAD REINFORCEMENT OR CUT PROTECTOR
PLIES OR TIRE BALANCE IS AFFECTED.
Tire Damage/Wear Conditions
Figure 602 (Sheet 5)
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TREAD REINFORCEMENT/
RIB UNDERCUTS GROOVE CRACKS
TIRES WITH A CRACK THAT EXTENDS BELOW TIRES WITH CIRCUMFERENTIAL CRACKS AT THE BOTTOM
A TREAD RIB ARE NOT SERVICEABLE. OF THE GROOVES ARE NOT SERVICEABLE IF THE CRACKS
EXPOSE ANY FABRIC.
Tire Damage/Wear Conditions
Figure 602 (Sheet 6)
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OZONE AND/OR WEATHER CRACKS
TIRES WITH CRACKS IN THE SIDEWALL WHICH ARE CAUSED BY AGE/WEATHER DETERIORATION ARE NOT SERVICEABLE IF THE FABRIC IS EXPOSED.
Tire Damage/Wear Conditions
Figure 602 (Sheet 7)
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NEW TIRE (REF) NEW TIRE (REF)
TIRE SHOULD BE REMOVED IF BLISTERS OR CRACKS ARE FOUND IN A GROOVE BOTTOM WHICH EXPOSES FABRIC
SHOULDER WEAR CONDITIONS
Tire Damage/Wear Conditions
Figure 602 (Sheet 8)
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(a)
Examine the tires for air leaks, abrasions, unusual worn areas, cuts and flat spots.
(b)
Remove tires that have the conditions that follow: 1) Cuts or weather cracks in the grooves, the tread, shoulders or sidewalls that exceed the limits in Figure 602. 2) Blisters, bulges, or other signs of ply separation in the tread, shoulder or sidewall area.
3) Tires with a flat spot which shows the tread reinforcement ú ply (bias) or cut protector (radial). ú ú NOTE:____If the cut protector (radial) or tread reinforcement ú ply (bias) shows, the tire may be used without ú safety concerns. However, you may not be able to ú retread the tire if you leave the tire in service ú too long with this condition. ú
4) Other types of damage that can cause tire problems.
(c) Examine the tires for worn areas. GUN 1) Remove the tire if at any point the wear reaches the bottom GUN of the groove or the first ply is exposed. Tires reaching GUN this limit at a remote station can make return to base GUN flight(s). GUN GUN NOTE:____If the tread reinforcement ply shows, the tire may GUN be used without safety concerns. However, you may GUN not be able to re-tread the tire if you leave the GUN tire in service too long with this condition.
GUN 2) If worn to the second ply, then the tire must be replaced GUN at once.
TASK 32-45-04-216-008
3. Thermal Fuse Inspection
_______________________
A. References
(1)
AMM 32-00-20/201, Landing Gear Downlocks
B.
Access
(1)
Location Zones
711 Nose Landing Gear
731 Landing Gear Left
741 Landing Gear Right
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C. Examine the Thermal Fuse
S 216-007
(1)
The steps that follow are the specifications for the thermal fuse conditions:
(a)
When there is a decrease in the pressure because the wheel thermal fuse melted or extruded, remove the tire because it is not serviceable.
NOTE: Also, examine all other main gear tire-wheels for signs
____ of melted, extruded, or leaking thermal fuses (specially at the tire-wheel positions with hot brakes).
(b)
When an inspection shows that a wheel thermal fuse is not fully melted (extruded) but it does not leak, do the step that follows: 1) Examine the wheel for leaks before each flight until the
tire/wheel assembly is not serviceable and is removed.
(c)
When you remove a tire/wheel assembly because of the steps that follow, put a tag on the assembly and tell why it was removed: 1) The wheel turned on the runway without a tire 2) Each tire on the same axle is a flat tire, and the tires
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