TM   10-5430-226-20P (a)  The  maintenance  code  entered  in  the  third  position  tells  you  the  lowest  maintenance  level authorized to remove, replace, and use an item. The maintenance code entered in the third position will indicate authorization to the following levels of maintenance. Maintenance Application/Explaination C o d e C - Crew or operator maintenance done within unit/AVUM maintenance. O - Unit level/AVUM maintenance can remove, replace, and use the item. F - Direct support/AVlM maintenance can remove, replace, and use the item. H - General support maintenance can remove, replace, and use the item. L - Specialized repair activity can remove, replace, and use the item. D - Depot can remove, replace, and use the item. (b)  The  maintenance  code  entered  in  the  fourth  position  tells  whether  or  not  the  item  is  to  be repaired and identifies the lowest maintenance level with the capability to do complete repair (i.e., perform all authorized repair functions.) NOTE Some limited repair may be done on an item at a lower level of maintenance, if authorized by the Maintenance Allocation Chart and SMR codes. Maintenance Code O - F - H - L - D - Z - B - Application/Explaination Unit/AVUM is the lowest level that can do complete repair of the item. Direct support/AVIM is the lowest level that can do complete repair of the item. General Support is the lowest level that can do complete repair of the item. Specialized repair activity is the lowest level that can do complete repair of the item. Depot is the lowest level that can do complete repair of the item. Nonreparable. No repair is authorized. No repair is authorized.   No parts or special tools are authorized for the maintenance of a “B” coded item. However, the item may be reconditioned by adjusting, lubricating, etc., at the user level. (3) Recoverability Code.   Recoverability codes are assigned to items to indicate the disposition action on unserviceable items. The recoverability code is entered in the fifth position of the SMR Code as follows: Recoverability Codes Application/Explaination Z - Nonreparable item. When unserviceable, condemn and dispose of the item at the level of maintenance shown in 3d position of SMR Code. O - Reparable item. When not economically reparable, condemn and dispose of the item at unit or AVUM level. F - Reparable item. When uneconomically reparable, condemn and dispose of the item at the direct support or AVIM level. H - Reparable item. When uneconomically reparable, condemn and dispose of the item at the general support level. D - Reparable item. When beyond lower level repair capability, return to depot. Condemnation and disposal of item not authorized below depot level. 3