accordingly. Tubeless tires are inflated in the same
the rim flanges. Deflate the tire and install the valve
manner as tube tires except the valve core is not
core. Then, reinflate the tire to its maximum operation
removed.
pressure. You should allow the tire to remain at this
pressure for a minimum of 10 minutes. At the end of
TIRE RETREADING AND REPAIR
this 10-minute period, there should be no detectable
pressure loss.
The Navy considers all aircraft tires to be
NOTE: Install only aircraft tire valve cores, P/N
potentially retreadable. Used aircraft tires should not be
TRC24 or C4, identified by a slot in the head of the pin.
discarded or scrapped until they have been determined
See figure 7-25.
unfit for further use. All tires removed from aircraft
should have the injuries marked with a wax crayon.
If no pressure loss is detected, the tire pressure is
Then, the tire should be turned in to the AIMD or IMA
reduced to 50 percent of the maximum operating
for screening. The AIMD or IMA will determine if the
pressure or 100 psi, whichever is less. The tire and
tire is serviceable or nonserviceable and take the
wheel assembly is then removed from the safety cage, a
necessary action.
valve cap installed, and the assembly stored in a rack,
ready for issue.
Serviceable Tires
If there is a significant pressure loss, the tire
pressure is reduced to 50 percent of the maximum
Serviceable tires are those judged suitable for
operating pressure or 100 psi, whichever is less. Then,
continued service use by the tire shop personnel. They
the assembly is removed from the safety cage and the
should be retained in service until the remaining tread
cause of the leak determined. If a slow leak is detected,
at any spot is one thirty-second of an inch thick or to the
the air retention test should be extended to 24 hours. If
limits of the tread wear indicators. Defects permitted
the leakage exceeds 5 percent, the tire should not be
are cut limits contained on the tire sidewall or as listed
issued until remedial action is taken.
in Aircraft Tires and Tubes, NAVAIR 04-10-506. Cuts
are permitted in the sidewall provided they do not
A loss of pressure less than 5 percent may be
penetrate to the cord body fabric.
experienced during the first 24 hours after initial
inflation of a new tire. This is attributed to normal tire
Nonserviceable Tires
stretch. The tire pressure should be adjusted
Nonserviceable tires may be nonretreadable or
retreadable. Nonretreadable tires should be coded "H"
(BCM-9) for condemnation and forwarded to the local
supply department. The following inspection criteria
must be used by the tire shop personnel to determine
those tires that are nonretreadable:
Blowouts
Punctures extending through the entire carcass
that measure more than one-fourth inch in diameter or
length on the outside and more than one-eighth inch in
diameter or length on the inside
Loose, frayed, or broken cords evident on the
inner tire surface
Cord body fabric damage, visible to the naked
eye without the use of mechanical devices
NOTE: Exposure of cords on fabric-reinforced
tread tires (imprinted on the tire sidewall) is
permissible.
Kinked, broken, or exposed wire beads
Figure 7-25.--Valve core identification.
7-20
