MIL-DTL-11891G(AT)
APPENDIX D
D.3.21 Inspection and replacement criteria. The track pad shall be replaced if the grouser
marks a paved surface. Pad blowout or chunking does not meet criteria for replacement given
that the grouser is not marking the road. The whole assembly shall be replaced if the pad mount
is damaged or unable to remove pad. Replacement pad height must be within 1/4 inch (plus or
minus) of neighboring pads. The test site shall use either a worn pad or shave down a spare pad.
D.3.21.1 Pad inspection. As a minimum, test site personnel shall inspect the pads on a
daily basis or after approximately every 50 miles, whichever occurs first. During break-in, a visual
inspection shall be made between each division of the break-in run.
D.3.22 Disposition of pad test hardware. All pad test hardware shall be retained at the
test site pending disposal instructions, including failed track pad components. Pads that are
defective or have completed testing may be stored outdoors while waiting for disposition
instructions. It is essential that each manufacturer's pad samples are not commingled with
samples from another manufacturer or other compound sample.
D.3.22.1 Failed track pad marking. All failed track pads shall be tagged and marked so as
to identify accumulated test miles and cross reference to daily logs or reports, as appropriate to
provide for traceable component failure history.
D.3.22.2 Hardware (failure analysis). Hardware required for failure analysis shall be
provided to the Preparing Activity upon request.
D.3.23 Vehicle disposition. Upon completion of the test and inspections, the vehicle shall
be returned to the original pretest condition. Vehicle disposition instructions will be issued by the
Preparing Activity.
D.3.24 Documentation/test reporting/photographic coverage. Any test incidents related
to track, suspension, and/or drive train components shall be documented on AMC Form 2134,
Test Incident Report (TIR) or comparable test reporting document. The test site shall provide
these reports to the Preparing Activity as they are generated. Each TIR or other test reporting
document shall include as a minimum the following:
a.
Description of failed component/part (noun).
b.
Mileage pads have endured.
c.
Date of incident.
d.
Description of incident. Description shall be detailed and shall include cause, if
evident.
e. Test course where incident occurred (if known).
f. Estimated vehicle speed when incident occurred.
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