MIL-DTL-83420 Wire Rope, Flexible, For Aircraft Control, General Specification ForThis specification covers the requirements for carbon steel and corrosion resistant steel aircraft control flexible wire rope. Type I wire rope will be capable of operation within a -65 degrees F to +250 degrees F \(-54 degrees C to +121 degrees C\) temperature range in wind, dust, fuel, and oil spills, in wash-down and other environmental stresses and aircraft experiences. Type II wire rope will be capable of operation within a -65 degrees F to +200 degrees F \(-54 degrees C to +94 degrees C\) temperature range in wind, dust, fuel, and oil spills, in wash-down and other environmental stresses and aircraft experiences.

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MIL-DTL-83420M

Any deleterious effects, such as cracking or separating from the wire rope, shall be cause for

rejection.

3.7.1.1 Concentricity. The differences in wall thickness as determined in 4.4.2.1 shall

not exceed 20 percent.

4. VERIFICATION

4.1 Classification of inspection. The inspection and testing of the wire rope shall be

classified as follows:

a. Qualification inspection (see 4.2).

b. Conformance inspection (see 4.3).

4.2 Qualification inspection.

4.2.1 Qualification inspection samples. When conducting qualification tests specified

herein, one sample lot for each size and construction of wire rope listed in tables I and II, for

which qualification is desired, shall be taken after any discard has been removed from the head

or starting end of the first manufacturing reel for each lot of wire rope.

4.2.1.1 Lot. A qualification inspection lot shall consist of 50 feet of wire rope of the

same construction and diameter produced continuously by one machine or by one series of

progressive processing machines.

4.2.2 Qualification testing. Qualification tests shall be performed for each size and

construction of wire rope for which qualification is desired as specified in table V.

4.2.3 Qualification for type II. Qualification for type II wire rope shall be finalized after

the following:

a. Receipt from the nylon manufacturer of a test report that includes, as a minimum, the

results of the tests specified in 4.5.

b. Successful completion of the remaining qualification tests for type II wire rope.

4.2.3.1 Duplication nylon certification. If two or more type II wire rope sizes are

submitted for qualification, and the nylon coating is of the same type and grade, copies of the

original test certification on the particular type and grade of nylon will satisfy the requirement as

specified in 4.2.3 and 4.3.4.

4.2.4 Maintenance of qualification. To maintain qualification, the manufacturer must be

able to demonstrate that the company still has the capabilities and facilities necessary to produce

the items. The qualifying activity will request appropriate documentation demonstrating this

capability at the time qualification retention is required (at least 2-year intervals).