CHAPTER  3 AVIATION  SUPPLY Previous chapters introduced you to some of the purposes for the various levels of maintenance and the associated maintenance reports and publications. This chapter discusses the actions you perform that affect the logistics support (supply) of your activity. ORDERING AIRCRAFT REPLACEMENT  PARTS LEARNING  OBJECTIVES:  Identify  the purpose  and  composition  of  Project/Priority codes.  Define  the  purpose  of  Force/Activity and Urgency of Need Designators. Describe how  the  supply  department  justifies  stocking replenishment items. The information you provide so readily about your car cannot be given as easily about aircraft parts. Therefore, the Navy has shop supervisors and material specialists,  Aviation  Storekeepers  (AKs),  available  to help you identify components and bits and pieces of components.  The  AK  is  the  representative  of  the aviation supply department, and fills a position similar to that of the clerk in the automobile parts store. Remember how you removed the broken water pump from your car and obtained a replacement for it? The clerk in the parts store ordered the part by filling out  a  form  or  even  more  recently,  responding  to questions asked by a computer. When you discover a part on an aircraft that needs replacement, you order that  part  on  a  Visual  Information  Display System/Maintenance  Action  Form  (VIDSMAF)  or  in Naval Aviation Logistics Command Management Information  System  (NALCOMIS). When entering data on the VIDS/MAF (a 5-part form), you must use a black ballpoint pen. Press hard so that all copies are readable, and PRINT LEGIBLY. Failure to write clearly cannot only cause receipt of the wrong part, but the AK might order an item that costs thousands of dollars simply because YOU DID NOT WRITE A PART NUMBER CLEARLY. There are many reasons for mistakes. Often: mistakes are as simple as a transposed part number or NSN. The lack of a dash number (-1, -2, -3) can cause supply to put the next higher assembly on order. When entering a part number, you need to make sure that the part number is 100-percent correct. DO NOT  GUESS!  You  should  use  the  publications available and, if in doubt, ask for help. Not all items for  a  particular  type  of  aircraft  are  interchangeable. Some  examples  of  differences  are  different  part numbered items for different models of the same type of aircraft, and different dash numbers in a part number to  designate  which  side  (left-hand  or  right-hand)  an item is designed for. PROJECT AND PRIORITY CODES Once your work center determines that a part is required, maintenance control assigns the Project and Priority codes that material control uses to requisition the  part. Project Codes Project codes identify requisitions and related documents that apply to specific projects or programs. They  are  mandatory  on  Navy  requisitions.  Their absence is cause for rejection. The codes consist of a combination of three codes (alpha/alpha/numeric) constructed from a matrix that relates to the type of activity or weapon, the reason, and the cause/effect (fig. 3-1). Some commonly used Project  codes  in  an  organizational  maintenance activity are as follows: AK0.  Assigned  by  organizational  maintenance activities only when they requisition material to restore an aircraft to mission capable (MC) status. AK7. Assigned by organizational maintenance activities when they requisition material to return mission   essential   subsystems   to   an   operational condition when an aircraft is in a partial mission capable (PMC)  status, ZA9. Forced high-time removal items required for immediate end use on primary mission weapons systems. The aircraft concerned is within days of becoming not mission capable supply (NMCS) or partial mission capable supply (PMCS) due to high time forced removal of the required item (15 days in CONUS and 20 days outside continental limits of the United 3-1