MIL-DTL-46714E(AT)
3.4.8 Life cycle.
3.4.8.1 Road/terrain, course and speed requirements. When loaded with payload of
12 000 lbs evenly distributed, the semitrailer shall complete a minimum of 6000 miles of operation
plus remaining terrain testing as specified in table I without failure of the following (see 4.5.6.1).
a. Components and subassemblies, i.e., kingpin, van body structure, van bogie
structure, including suspension brackets.
b. Performance requirements of 3.4.
The term "without failure" specified herein refers to components/items/vehicles that shall meet
their normal performance/functional requirements, shall have no weld cracks, shall have no base
metal cracks, and shall have no permanent deformation of items after completion of the 6000 mile
test specified herein.
3.4.8.2 Durability. When operated in accordance with 3.4.8.1, the vehicle shall possess
not less than 0.60 probability of completing a minimum of 6000 miles of operation, when loaded
in accordance with table I without replacement or overhaul of the principal components and
subassemblies, i.e., under-carriage frame, kingpin, van body, suspension assembly including
springs, axle and wheels, landing device, leveling mechanism, and brake system components (less
brake shoes and common hardware) (see 4.5.6.1). The criteria for replacement or overhaul will
be as prescribed by the maintenance manual.
3.4.8.3 Maintainability. The total scheduled and unscheduled maintenance excluding
driver/crew checks and services shall not exceed 19 manhours during the first 6000 miles of
operation, at the speeds specified in table I, and with rated payload. This equates to a MR of
0.127 at 20 mph. The scheduled maintenance intervals shall be 3 months or 3000 miles of
operation, whichever comes first. Maximum time to repair (to include diagnosis, repair, and
verification) using personnel normally employed at (see 4.5.6.2):
a. Organizational maintenance level shall not exceed 3 hours 95% of the time.
b. Direct support maintenance level shall not exceed 7 hours 95% of the time.
3.5 Painting. All van exterior and interior surfaces shall be suitably cleaned, treated and
primed for the applicable semitrailer material. Final top coat color shall be forest green, color
chip number 34083 in accordance with FED-STD-595 (see 4.5.2). If required, CARC paint shall
be specified in the contract or order (see 6.2).
3.6 Marking. Marking shall be as follows (see 4.5.2):
a. The United States registration number marking shall be black, 1 in. in height, and
applied to the inboard panel on the side door only.
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