TM-9-2920-257-30&P Maintenance and Parts Manual for 200 Amp M113 Generator Download
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TM 9-2920-257-30&P C-3. Explanation of Columns. a. Illustration. This column is divided as follows: (1) Figure number. Indicates the figure number of the illustration in which the item is shown. (2) Item number. The number used to identify each item called out in the illustration. b. Source, Maintenance, and Recoverability (SMR) Codes. (1) Source code. Source codes indicate the manner of acquiring support items for maintenance, repair, or overhaul of end items. Source codes are entered in the first and second positions of the Uniform SMR Code format as follows: Code Definition PA - Item procured and stocked for anticipated or known usage. PB - Item procured and stocked for insurance purpose because essentiality dictates that a minimum quantity be available in the supply system. PC - Item procured and stocked and which otherwise would be coded PA except that it is deteriorative in nature. PD - Support item, excluding support equipment, procured for initial issue or outfitting and stocked only for subsequent or additional initial issues or outfittings. Not subject to automatic replenishment. PE - Support equipment procured and stocked for initial issue or outfitting to specified maintenance repair activities. PF - Support equipment which will not be stocked but which will be centrally procured on demand. C-2