ENGINEMAN 1 & Crepair work to be done whenever the need for suchwork arises.Review the Maintenance and MaterialManagement (3-M) Manual, OPNAVINST4790.4, it will make your planning and schedul-ing considerably easier.Materials and Repair PartsThe responsibility for maintaining adequatestocks of engineroom repair parts and repairmaterials belongs at least as much to you as it doesto the supply department. The duties of the supplyofficer are to procure, receive, stow, issue, andaccount for the support of the ship. However, thesupply officer is not the prime user of repair partsand repair materials; the initiative for maintain-ing adequate stocks of repair materials, parts, andequipment must come from the personnel who aregoing to use such items. Namely You!Basic information on supply matters is givenin Military Requirements for PO 3 & 2, NAVED-TRA 10056 (current edition), Military Re-quirements for PO 1 & C, NAVEDTRA 10057(current edition), and OPNAVINST 4790.4,volume II.Identification of RepairParts and MaterialsIdentification of repair parts and materials isnot usually a great problem when you are deal-ing with familiar equipment on your own ship;but it may present problems when you are doingrepair work for other ships, as you would ifassigned to the machine shop on a repair ship ortender.The materials and repair parts to be used arespecified for many repair jobs but not for all.When materials or parts are not identified in theinstructions accompanying a job, you will eitherhave to use your own judgment or do researchto find out just what material or part should beused. When you must make the decision yourself,select materials on the basis of the service condi-tions they must withstand. Operating pressure andoperating temperature are primary considerationsin selecting materials and parts for mostengineroom repair work.The fact that materials and repair parts arenot specified in the instructions accompanying ajob does not mean that you are free to use yourown judgment in selecting parts and materials toaccomplish a job. Instead, it usually means thatyou must know where to look for information onthe type of material or repair parts needed, thenlocate and requisition them in order to completethe assigned job.There are several shipboard sources of infor-mation that will be useful to you in identifyingthe equipment and/or the repair parts needed.They include the Coordinated ShipboardAllowance List (COSAL); nameplates on theequipment; manufacturer’s technical manuals;and ships’ plans, blueprints, and other drawings.COORDINATED SHIPBOARD ALLOW-ANCE LIST (COSAL).—The COSAL isboth a technical and a supply document preparedfor an individual ship. It lists the equipment orcomponents required for the ship’s operation; therepair parts and special tools required, theoverhaul and repair equipment, and themiscellaneous portable items necessary for thecare and upkeep of the ship.For your purpose, the COSAL is the basicsource of information on repair parts andmaterials needed for a job. A COSAL gives youinformation on such items as the noun name ofa system (engine, pump, ejector, etc.), themanufacturer’s name and the I.D. number(General Motors Corporation #3255), thetechnical manual number for the system, themanufacturer’s drawing numbers, and theAllowance Parts List (APL) numbers for relatedsystems (governor’s, starters, transmissions, etc.).In addition, COSAL provides specific informa-tion about National Stock numbers (NSNs), unitsof issue, costs, and the number of items needed.It may also include lists of part numbers andFederal Stock Numbers (FSNs) for crossoverchecks.To request materials and repair parts from thesupply department aboard ship, you must fill outand submit a NAVSUP Form 1250, a single itemconsumption/management document. If the itemis not stocked aboard ship, the supply departmentwill requisition the material from a supply activity,using the identifying information that you havegiven on the NAVSUP Form 1250. However, if2-20
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