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MIL-S-62549(AT)
4.4.1.1 Sampling, process average. Sampling may be initiated if the process average for the
first 50 consecutively serial numbered trailers inspected, is less than the Acceptable Quality levels
(AQL) specified in the classification of defects for critical, major, and minor defects. Process
average will be computed as follows:
Number of defects x 100___
Process average = Number of trailers inspected
If the computed process average exceeds the specified AQL, the 100% inspection shall be
performed and continued until such time that the process average for 50 consecutively serial
numbered trailers is less than the specified AQL. When sampling is authorized, MIL-STD-105,
level II will apply.
4.4.2 Samples. Samples shall consist of complete semitrailers with all on-vehicle-equipment
(OVE) installed.
4.4.3 Examinations. Visual, dimensional, and preliminary functional examination shall consist
of examination of trailers for conformance to the applicable drawings and the requirements of this
specification. Examinations shall be preformed utilizing the classification of defects in table VI
with AQLs, as specified.
TABLE VI. Classification of defects.
Category
Characteristic
Defect
Method of
Inspection
Critical
AQL 0.0% defective
01
Axles and trunnions
Inoperative
Functional
02
Brake system components
Inoperative
Functional
03
Air line and fittings
Air leaks over
Functional
2 pounds per
square inch per
minute, chaffing
04
Electrical system
Inoperative
Functional
components (turn indicators,
clearance lights, brake
lights including bulbs)
05
Folding gooseneck
Restricted operation,
Functional
will not lock in up
position
06
Intravehicular
Pin misalignment,
Visual
connecting plugs
deformation
25

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