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