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MARINE CORPS FORMS - TM-10-1670-277-23P_215
EXPLANATION OF COLUMNS IN THE MAC, TABLE 1 - TM-10-1670-277-23P_218

TM-10-1670-277-23P Parachute Cargo Type: 28-Foot Diameter Cargo Extraction Parachute Assembly NSN 1670-00-040-8135 Manual
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TM 10-1670-277-23&P 0056 00 SUPPORTING INFORMATION 28-FOOT DIAMETER CARGOR EXTRACTION PARACHUTE MAINTENANCE ALLOCATION CHART (MAC) 0056 00-1 THIS WORKPACKAGE COVERS:   Introduction   Maintenance Functions   Explanation of Columns in the MAC   Explanation of Columns in Tool and Test Equipment Requirements   Explanation of Column in Remarks INTRODUCTION The Army Maintenance System MAC This section provides a general explanation of all maintenance and repair functions authorized at various maintenance levels under the standard Army Maintenance System concept. The Maintenance Allocation Chart (MAC) designates overall authority and responsibility for the performance of maintenance functions on the identified end item or component.  The application of the maintenance functions to the end item or component will be consistent with the capacities and capabilities of the designated maintenance levels, which are shown in the MAC in column (4) as: Unit – includes two sub-columns, C (operator/crew) and O (unit) maintenance Direct Support – includes an F sub-column General Support – includes an H sub-column Depot – includes a sub-column The tools and test equipment requirements (immediately following the MAC) list the tools and test equipment (both special tools and common tool sets) required for each maintenance function as referenced from the MAC. The remarks (immediately following the tools and test equipment requirements) contain supplemental instructions and explanatory notes for a particular maintenance function. MAINTENANCE FUNCTIONS Maintenance functions will be limited to, and defined, as follows: Inspect.  To determine the serviceability of an item by comparing its physical, mechanical, and/or electrical characteristics with established standards through examination (e.g. by sight, sound, feel, etc.). Test.  To verify serviceability by measuring the mechanical, pneumatic, hydraulic, or electrical characteristics of an item and comparing those characteristics with prescribed standards. Service.  Operations, periodically required, to keep an item in proper operating condition, i.e., to clean (includes decontaminate, when required), to preserve, to drain, to paint, or to replenish fuel, lubricants, chemical fluids, or gases. Adjust.  To maintain or regulate, within prescribed limits, by bringing into proper or exact position, or by setting the operating characteristics to specified parameters. Align.  To adjust specified variable elements of an item to bring about optimum or desired performance. Calibrate.  To determine and cause corrections to be made or to be adjusted on instruments or test, measuring, and diagnostic equipments used in precision measurement.  Consists of comparisons of two instruments, one of which is a certified standard of known accuracy, to detect and adjust any discrepancy in the accuracy of the instrument being compared.







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