A-A-2687A
4.2 Inspection: It shall determined that the sample units meet all salient characteristics stated in the requirements section of this document. Any sample containing one or more defects shall be rejected, and if the number of rejected units exceeds the acceptance number for that sample, the lot represented by the sample shall be rejected.
4.3 Test conditions: All tests shall be conducted with an air supply of 90 psig (620 kPa) or at the manufacturers recommended pressure measured as close to the tool as practicable. The test tool shall be connected to the air supply line by means of a 10 floor length of air hose having a hose size of 5/16 inch (inner diameter). The air supply line shall be equipped with a filter, air pressure regulator and lubricator.
4.4 First article inspection. When specified, the contractor shall furnish one sample of a completely fabricated tool for first article inspection. The sample shall have been manufactured and inspected using the same materials, processes, and methods that will be used in the production of the tool used to fulfill the terms of the contract or purchase order. The sample shall meet the requirements of this Commercial Item Description. Approval of the first article sample shall not relieve the contractor of the responsibility to furnish tools in accordance with the requirements of this Commercial Item Description. First article inspection shall consist of the following evaluation in the sequence listed: Inspection, Air consumption test, Performance test, Sound pressure level test, Practical service test, Service test, and Examination after service test.
4.5 Production lot inspection and testing: Production lot testing shall consist of the following evaluations conducted in the sequence listed: Inspection, Air consumption test, speed test, and Practical service test. A sample lot shall consist of all items of same NSN offered for delivery at one time. Sampling procedures shall be in accordance with ANSI/ASQC Z1.4 at an Inspection Level of S-3. The acceptable quality level (AQL) shall be 1.5 defects per 100 units tested. A sample unit shall consist of one completely fabricated tool.
4.6 Air consumption test: Air consumption shall be measured with either a certified liquid displacement meter or a flowmeter.
4.7 Speed test: Each sample tool shall be tested to determine compliance with the speed requirement specified herein. A stroboscope, tachometer or other suitable device, of sufficient capacity and accuracy, shall be used.
4.8 Sound pressure level test: The sound pressure level test shall be conducted in accordance with the applicable provisions of the Compressed Air and Gas Institute’s “CAGI-PNEUROP Test Code for the Measurement of Sound from Pneumatic Equipment”.
4.9 Performance test: A 10 pound weight shall be placed on top of the sander. The sander shall be operated using 80 grit sandpaper on a pine wood surface. The sander shall operate smoothly without any excessive vibration. The sander load speed shall be measured using a troboscope or equivalent device. The load speed shall not be less than 80 percent of the no-load speed.
4.10 Practical service test: Each sample tool shall be operated for 5 minutes. The test shall duplicate a typical work application. During the test, the tool shall be checked for throttle operation, rotation, excessive noise or vibration, ease of operation, and general serviceability.
4.11 Service test: A simulated service test shall be conducted for 150 hours. A test sample shall be installed in a fixture in a manner that the tool can be loaded and automatically actuated 150 hours. A load of 5 pounds, in addition to the weight of the tool, shall be applied perpendicular to the plane of the sanding pad during the load portion of the test cycle. Each cycle shall be 2 minutes ON and 2 minutes OFF.
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