TM10-5411-200-24PTO35E4-177-4CODEADXAXBXCXDDEFINITIONItem to be assembled at depot maintenancelevels.Item is not procured or stocked because therequirements for the item will result in thereplacement of the next higher assembly.Item is not procured or stocked. If not avail-able through salvage, requisition.Installation drawing, diagram, instructionsheet, field service drawing that is identifiedby manufacturers’ part number.A support item that is not stocked. Whenrequired, item will be procured throughnormal supply channels.(*) NOTE: For USAF and the USA Safeguard Pro-gram only Code “F” will be used to denote intermedi-ate maintenance On joint programs use of either codeFor H by the joining service will denote intermediatemaintenance to USAF and USA Safeguard Program.(2) Uniform Maintenance Code applicable to allMilitary Services: GENERAL; Maintenance Codesare assigned to indicate the levels of maintenanceauthorized to USE and REPAIR support items. TheMaintenance Codes are in the third and fourth posi-tion of the Uniform SMR Code Format.(a) USE (THIRD POSITION): The Main-tenance Code entered in the third position indicatesthe lowest level maintenance level authorized toremove, replace and use the support item. The Main-tenance Code entered in the third position indicatesone of the following levels of maintenance.CodeOFGHD(b)Application/ExplanationSupport item is removed, replaced, used atthe organizational level of maintenance.Support item is removed, replaced, used atthe following intermediate levels:USAF–Intermediate (*)USA–Direct Support (*)USN–AfloatUSMC–Third EchelonSupport item is removed, replaced, used atboth afloat and ashore intermediate levels:Navy only.Support item is removed, replaced, used atthe following intermediate levels:USAF–Intermediate (*)USA–General Support (*)USN–Ashore (Only)USMC–Fourth EchelonSupport items that are removed, replaced,used at Depot only:USAF–Depot, Mobile Depot and Special-ized Repair ActivityUSA–Depot, Mobile Depot and SpecializedRepair ActivityUSN–Aviation Rework, Avionics andOrdinance Facilities and Shipyard.USMC–DepotREPAIR (FOURTH POSITION): The main-tenance code entered in the fourth position indicateswhether the item is to be repaired and identifies thelowest maintenance level with the capability to perform complete repair (i.e. all authorized maintenancefunctions).3
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