controlling custodian. The 3M Aviation Organization Code Master Listing, NAMSO 4790.A7065-01, provides a complete listing of these codes. The first character of the organization code identifies the major command. The second and third characters identify specific units within the major command. Refer to the NAMP, volume V, appendix K for more information on organization code structuring. . Enter the JOB CONTROL NUMBER (JCN) in the register. The JCN is a 9-, 10-, or 11-character alphanumeric code that serves as the base for the maintenance data report (MDR) and control procedures. The JCN allows for separate identification of each maintenance action. Also, it provides a link with the maintenance actions performed by the intermediate maintenance activity (IMA) in support of an activity or an O-level maintenance discrepancy. The JCN consists of four parts. They are the organization code, date, serial number, and suffix. The paragraph above describes the organization code. The date is the last three digits of the Julian date. This is the date the JCN was assigned to a maintenance action. It does not necessarily reflect the date when the work started. The serial number maybe a three-digit number that runs sequentially from 001 to 999. Also, it maybe three alphanumeric characters. This number is used in sequence for each new job initiated. After using serial 999, the next number in sequence will be 001. The alphanumeric characters are used only when documenting inspections other than preflight, postflight, turnaround, daily, special, conditional, corrosion, and acceptance/transfer. This element may be omitted for initial issues and issues from pre-expended bins. . Enter the TYPE EQUIPMENT CODE (TEC) that describes the end item on which the work is being performed. This is a four-character code that identifies the end item or category of equipment. Refer to the NAMP, volume V, appendix Q, for additional information about this code. . Enter the BUREAU or SERIAL NUMBER of the equipment or item being worked on. If the number is more than six digits, enter the last six. If it is less than six digits, prefix it with zeros to make six digits. This element maybe omitted, if not applicable. . Enter the WORK UNIT CODE (WUC) that identifies the system, subsystem, or component. Refer to the WUC manual for specific aircraft type. The NAMP, volume V, appendix O, provides a list of general WUC. This element may be omitted for issues on technical directive compliance (RECTYP 64). Also, this element may be omitted for initial issues and issues from pre-expended bins. l Enter the COMMERCIAL AND GOVER- NMENT ENTITY (CAGE) code. This element must contain the engine TEC in lieu of the CAGE when ordering engines. Cognizance symbol 4V identities engines. . Enter the PART NUMBER of the required item. . Enter the QUANTITY needed to do the work . Enter the PROJECT CODE assigned. NAVSUP P-437 and P-485 provide a list of project codes. . Enter the proper REQUISITION PRIORITY DESIGNATOR according to OPNAVINST 4614.1 (series). . When required, enter the REQUIRED DELIVERY DATE (RDD). . When needed, enter the DELIVERY POINT. . Enter the ADVICE CODE when needed. An advice code is mandatory for repairable items. . Enter the DOCUMENT NUMBER assigned from the requisition log. Material for technical directive (TD) modifications are issued and accounted for based on the requirements stated on the TD.TD kits and government-furnished equipment (GFE) that complements these kits are budgeted and issued as NAVAIR-owned material. They are issued for onetime installation in specified equipment during fleet maintenance overhaul, repair, or modification programs. The Naval Aviation Maintenance Office (NAMO) assigns the kit identification numbers for TD kits and GFE. The purpose for assigning the kit number is for identifying, requisitioning, and reporting the items. The Aviation Supply Office (ASO) maintains the records and stock balances of the kits for NAMO on the master data file. The daily receipt and processing of transaction item reports (TIR) updates the master data file. If available, use pre-expended bins (PEB) to get the required items. PEB consist of low-cost, frequently used, maintenance-related items. Items stocked in the PEB are already paid for. Issues made from PEB do not create a charge to a squadron’s account. The value of material in the PEB is charged to the overhead of industrial-type activities. At other activities, the value is charged to the accounts chargeable. The purpose of the PEB is to shorten the issue and accounting procedures 8-3