a result of the RIP, some allowances at an operating site may or may not get adjusted. Increases in depth and additions to the range to the ship’s allowance are implemented during the re-AVCAL. Preliminary AVCAL Aids The Naval Inventory Control Point-Philadelphia (NAVICP-Phil) forwards the preliminary AVCAL review aids to the applicable ship and cognizant TYCOM 45 days before the scheduled conference date. AVCAL Quality Review Conference (AQRC) The NAVICP-Phil convenes the conference to negotiate the allowance requirement of the operating site. The information in the site’s maintenance data collection system is the primary element in negotiations of repairable items. The information includes the number of items processed as BCM, items repaired, and the TAT of repairs. The NAVICP-PMI adjusts the preliminary requirement levels to reflect the negotiated allowance. Authorized changes will be incorporated in the final AVCAL products that are forwarded to the operating site. NOTE: The ACR-F is used to request an increase or decrease in allowance after the re-AVCAL. Miscellaneous Requirements Other OSI requirements include the industrial support package (ISP) and the supplemental aviation spares support (SASS). The ISP is designed to provide an 8-month range and depth support for an aircraft carrier’s LRCA and is currently incorporated in the community SAVAST. The SASS is supplemental and not additive to the operating site’s AVCAL quantity. These requirements are based on several factors, as follows: The level of repair The number and type(s) of aircraft to be supported Predicted removals The flying hours expected over an endurance period LEVEL OF REPAIR.— OverhauI, repair, and maintenance of aeronautical material and weapons systems are performed within the broad guidelines of three levels of maintenance. They are the organizational, intermediate, and depot levels. A list of aircraft maintenance functions classified to the maintenance levels is provided in OPNAV Instruction 4790.2. It is important that you have a thorough knowledge of the maintenance that can be performed by your particular activity. Organizational Maintenance.— The classifica- tion of O-level maintenance is applied to those maintenance functions normally performed by an operating unit on a day-to-day basis of its own operation. O-level maintenance can generally be grouped to include aircraft inspections: servicing, handling, removal and replacement of defective parts and components; aircraft service changes and modifications; and necessary recordkeeping and reports peculiar to O-level maintenance. Intermediate Maintenance.— The I-level maintenance includes the repair and test of aircraft components and items requiring shop facilities and/or skills and equipment not available in O-level maintenance activities. Incorporation of aircraft service changes and modifications beyond O-level capabilities is also a function of I-level maintenance. Depot Maintenance.— The classification of D-level maintenance is applied to those functions performed at industrial-type activities such as naval aviation depots (NADEPs). The NADEPs are normally located at major air stations and perform overhaul and major rework on aircraft, engines, and components on a scheduled basis as directed by NAVAIR. They also perform a customer service program for nonscheduled overhau/repair on components to satisfy not mission capable supply (NMCS) requirements. Change of Maintenance Level.— When the maintenance level designation of an activity is changed, the range of supporting repair parts carried in stock as well as the equipment is involved. A change to a higher level of maintenance requires additional spare repair parts. It is also possible that the supply level could be changed at the same time. Each NAVAIR outfitting and allowance list in use is screened carefully to make sure that all items required to support the higher level are procured. A change to a lower maintenance level involves almost the same steps except in reverse manner. Many of the items required for support of a higher level are no longer required or allowed. Therefore, they must be returned to the supply system, and the equipment will normally be transferred to another activity for use. 4-21