APPENDIX I ABBREVIATIONS, ACCRONYMS, AND GLOSSARY OF TERMS ACC—Aircraft Controlling Custodian—A term applied to air commands and COMNAV- AIRSYSCOM for exercising administrative control of assignment, employment, and logistic support of certain aircraft and aircraft engines as specified by the CNO. The following ACCs have been designated by CNO: COMNAVAIRLANT, COMNAVAIRPAC, CNATRA, COMNAV- AIRESFOR, and COMNAVAIRSYSCOM. ACCEPTANCE—Assumption of responsibility for, or legal title to, an aircraft from another party. Receipt of new aircraft from a manufacturer (or of any aircraft from a non-Navy custodian) by a representative authorized to do so by the Navy. Provisional acceptance is the acceptance of an aircraft for which certain obligations with respect to the aircraft have not yet been fulfilled by the contractor. ACCEPTANCE INSPECTION—An inspection performed at the time a reporting custodian accepts a newly assigned aircraft, from any source, and on return of an aircraft from SDLM or other major D-level rework. It includes an inventory of all equipment listed in the AIR, verification of CADs and AEPSs, a configuration verification, hydraulic fluid sampling, a daily inspection, and a complete FCF. For acceptance inspection purposes, verification of CADs, AEPSs, and configuration is accomplished by visual external inspection and record examination only. Disassembly beyond the daily inspection requirements of applicable PMS publications is not required. The accuracy of flight hours on the Monthly Flight Summary (OPNAV 4790/2 IA) is verified by checking the PERIOD and SINCE NEW blocks and operating hours on the Equipment Operating Record (OPNAV 4790/3 IA) in the ACCUM block. Activities may elect to increase the depth of the inspection if equipment condition, visual external inspection, or record examination indicates such action is warranted. ACCEPTANCE INSPECTION (SE)—An inspection performed at the time a reporting custodian accepts a newly assigned item of SE. It includes an inventory of all records and components that make up the item of SE, a configuration verification, a preoperational inspection as required by the applicable MRCs, hydraulic fluid sampling, and a functional test. The activity receiving the item of SE may elect to increase the depth of inspection if the SE condition indicates such action is warranted. ACCUM—Accumulated. ACCUMULATED WORK HOURS—Hours that are expended against a job by individuals within the same work center. ACOMTRAK—Aircraft  Composition  Tracking (System)-An automated system for tracking the composition, location, and operating time/cycle counts of the life limited components of aircraft. ACOMTRAK is used to develop schedules for inspections, replacement procurements, and forced removal actions for these components based on usage requirements and fixed or variable hour or cycle counts or limits. It provides important support to the RCM Program. ACTION DATE—The Julian date on which a maintenance form is completed by a work center. ACT ORG—Action Organization-The activity that actually performs the maintenance action. It is identified by a three-character, alphanumeric code. ACTION TAKEN CODE—A one-character alphabetic or numeric code that describes what action has been accomplished on the item identified by a WUC. ACTIVE AIRCRAFT—Aircraft currently engaged in supporting flying missions either through direct assignment to aircraft units or reassignment through any of the logistic processes of supply, maintenance, or modification. AD—Aviation Machinist’s Mate. ADB—Aircraft Discrepancy Book. AI-1