Visual and mechanical

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MIL-P-85121( AS)

4.5.3 Lot sampling. Upon completion of the individual inspections, sample

projectiles shall be randomly selected in accordance with MIL-STD-105, Inspec-

tion Level S-2, for an Acceptable Quality Level (AQL) of 1.0 percent defective

and subjected to the Group B static forces and salt spray resistance tests of Table III.

Three hundred fifteen projectiles shall be randomly selected from the production

lot for the band tightness tests of Group B. One hundred fifty projectiles shall

be randomly selected and sent to the testing activity designated in the contract

or purchase order for Group C ballistic firing tests (see 6.2.1). Failure of the

sample to meet the requirements of the Group C firing tests shall be cause for

lot rejection.

4.6 Inspection methods.

4.6.1 Visual and mechanical. The projectile shall be visually and mechanically

inspected for conformance to the applicable drawing (see 3.3), identification and

marking (see 3.8), and workmanship (see 3.10).

4.6.1.1 Certification. The contractor shall have available for the Government

representative written certification, accompanied by objective quality evidence

(see MIL-STD-109), that the components and processes used as a part of the pro-

jectile meets the requirements specified herein. A certified analysis of each

melt of metal used shall also be available to the procuring activity.

4.6.1.2 Soundness. The MARK 11 MOD 1 and MARK 12 MOD 0 bodies, MARK 13

MOD 0 adapter, and the MARK 14 MOD 0 windshield shall be inspected automatic-

ally for metal discontinuities with the eddy current flaw detector (Drawing D11075203)

in accordance with NAPEC-OI-2 instructions. Projectiles failing to meet the

requirements of 3.5.2.1 shall be rejected.

4.6.1.3 Fractures or inclusions. The MARK 13 MOD 0 body (Drawing 1350781,

Item 1A) and the MARK 14 MOD 0 body (Drawing 1381197, Item 1A) shall be ultra-

sonically tested against the production standards outlined in NAPEC-0182. Pro-

jectile bodies failing to meet the requirements of 3.5.2.2 shall be rejected.

4.6.2 Static forces.

(a) Torque (pressure test and MARK 11 MOD 1). Sample projectiles

shall be clamped in a suitable fixture, which can subject the contacting

area of the body to the torque load. With the nose plug immobilized,

apply a minimum of 40 inch-pounds torque to the projectile body.

(The nose plug of the test projectiles may be modified to facilitate

application of test loads.) The projectiles shall meet the requirements

of 3.5.3(a).

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