APPENDIX A REFERENCES
V VFR Visual Flight Rule
VMC Visual Meteorological Conditions
WUC Work Unit Code
GLOSSARY
Adjusted Changes made to fit regulation specifications, such as, adjustments, corrections or calibrations that affect the performance of the component.
Airframe Condition
Evaluation (ACE) The ACE is the results of an annual evaluation of a specific aviation system, by aspecially trained inspection team.
Cannibalization The authorized removal under specified conditions, of serviceable and unservice- able reparable parts, components, assemblies, and/or sub-assemblies from an item authorized for disposal.
Component A combination of parts mounted together during manufacture, which are replaced, repaired, or tested as one unit; for example, transmissions, starters, and servo as- semblies.
Condemned An item determined to be unsuitable for return to a serviceable condition. It has reached its retirement life, or is of no further value for which it was manufactured or authorized.
Condition Change (CC) Item An item changed or repaired on an "as-required" basis.
Controlled Exchange Removal of serviceable parts, components, assemblies, and/or sub-assemblies from unserviceable but economically reparable equipment and their immediate reuse in order to restore a like item of equipment to a combat mission capable (MC) condition.
Critical Characteristic Any feature; such as, dimension, tolerance, finish, material, or assembly, manufac- turing or inspection process, operation, field maintenance, or depot level overhaul requirement which if non conforming, missing, or degraded could cause the failure or malfunction of a CSI item throughout its life cycle.
Critical Safety Item (CSI) A major component, assembly, sub-assembly, part, or an installation procedure, or a production process that contains a critical characteristic, whose failure or mal- function, or the absence thereof, could cause an un-commanded engine shutdown, or catastrophic failure resulting in loss of life, serious injury, damage to the aviation system/property, or an unsafe operating condition.
Depot Maintenance
Overhaul (DMO) A DMO is a maintenance action which restores an aviation system to a fully service-able condition per the appropriate Depot Maintenance Work Requirement (DMWR).
FED LOG An interactive computer based information system data source to provide a quick and easy reference to Federal logistical information. Included in the FED LOG sys- tem are the Army Master Data File (AMDF), Air Force Ship to Stock Record Account (SRAN), and Navy Master Repairable Item List (MRIL) data files.
Functional Inspection An inspection to determine whether or not the item will function in a prescribed manner when operated with required specialized diagnostic equipment and/or op- erational test stands.
Installation Critical
Characteristics Installation Critical Characteristics are not introduced during the manufacture of theitem; but, are critical in terms of assembly/installation; such as, proper torque.
Maintenance Test Flight
(MTF) A flight used to determine the airworthiness of the aircraft. The MTF ensures theairframe, flight controls, power plant, systems accessories and items of equipment are functioning according to predetermined specifications during flight.
Maintenance Operational
Check (MOC) A check of a system that is accomplished through an engine run-up and/or taxiing.Checks made using auxiliary power or testing equipment to simulate, in so far as possible, actual conditions under which the system is to operate.
Maintenance Parts Task
Trainers Portions of condemned aircraft (such as, tail boom or cabin section) used to trainsoldiers on maintenance tasks. Not reported on DA Form 1352.
Maintenance Training
Airframe (MTA) Condemned and/or retired aircraft/UA used to train maintenance personnel, or forequipment validation procedures. These aircraft/UA are retired, or damaged and/or deteriorated beyond the authorized expenditure limits and permanently grounded. They are reported on DA Form 1352.
(1) Category "A" Aircraft/UA. Aircraft/UA that are temporarily grounded but can be used for ground run operations. Aircraft/UA assigned on a temporary basis not to exceed 365 days to meet special training requirements. Aircraft/UA will be main- tained per applicable publications, and must be capable of being returned to full-fly- able status at the AVUM/AVIM level with, all inspections, maintenance, and required MWOs completed within 60 working days. They are reported on DA Form 1352.
(2) Category "B" Aircraft/UA. Grounded aircraft/UA that can be used for ground run operations, if all required equipment and components, are installed and functioning properly. Aircraft/UA may be returned to flight status only after depot level overhaul or rebuild. Aircraft transfer standards are not mandatory for transfer to depot or any activity authorized the use of Category B aircraft/UA. They are reported on DA Form 1352.
Maintenance Training
Device This is aeronautical equipment other then Category A or B aircraft/UA or mainte-nance training airframes used to facility maintenance training. Normally mainte- nance training devices are uninstalled elements to mockups of major assemblies or functional groups used by students for "practical exercises." Not reported on DA Form 1352.
Manufacturing Critical
Characteristics Critical Characteristics produced during the manufacturing process. Maximum Allowable
Operating Time (MAOT) An interval expressed in hours, cycles, starts, landings or calendar time (days,months, years) established as the maximum finite life usage for an item. The item must be removed from service when it reaches its MAOT and processed per the instructions in Chapter 9 of this manual.
Mutilation The physical act of making an item useless for its intended purpose, by reducing it to scrap; therefore, preventing any reconditioning of the item to a usable condition.
On Condition Maintenance
(OCM) A concept for selecting aircraft for input to depot maintenance based on a technicalevaluation of designated key points of the aircraft to measure the degree of struc- tural stress or deterioration.
Overhaul Maintenance performed to restore equipment or components to a completely ser- viceable condition with a measurable (expected) life. This process involves in- spection and diagnosis according to the appropriate Depot Maintenance Work Re- quirement (DMWR), National Maintenance Work Requirement (NMWR), or similar technical directions that identify components exhibiting wear and directs the re- placement or adjustment of those items IAW the applicable technical specifications. When a TC item is overhauled a new service life will start. This action will "zero" Time Since Overhaul, but not Time Since New.
Part An item or piece part that is not normally disassembled or repaired. The design is such that disassembly or repair is impractical; for example, brackets, gears, bolts, resistor, toggle switch or bearings.
ProfileIndex (PI) The profile index, of an aviation system, is the summation of the weighted factors assigned to each condition found and is a relative measure of airframe, structural distress or deterioration.
Rebuild Maintenance performed to restore an item to a like new condition in appearance, performance, and life expectancy. This is accomplished by inserting new technol- ogy where practical to improve reliability and maintainability. This is done by com- plete disassembly, inspection, and repairing or replacing all worn or unserviceable elements with new parts or parts that have been reworked to original manufactur- ing specifications. When an item is rebuilt it starts a new life cycle. This action will "zero" Time Since New, and Time Since Overhaul.
Recapitalization Current fielded systems rebuilt to like new condition to ensure operational readi- ness and near zero time. Near zero time standard means that selected compo- nents within the system will be replaced with new items or items overhauled to National Maintenance Program (NMP) repair standards by depot overhaul with a measurable (expected) life. Obsolete parts will be replaced and selected technol- ogy insertions will be made.
Receiving activity The unit or activity that is receiving accountability for the aviation system and/or associated mission equipment from a transferring activity.
Removed and Reinstalled Removing a component from aviation systems or associated mission equipment to aid maintenance and installing the same component back on the same aviation system or associated mission equipment in the same location without doing any maintenance or inspection other than a visual inspection to the component.
Repair Maintenance performed to restore an item to serviceable condition by correcting a specific failure or unserviceable condition thru replacement of parts and/or compo- nents. This allows a TC or RC item to complete its MAOT/TBO cycle. This action will not "zero" Time Since New or Time Since Overhaul.
Repair Kit A group of selected expendable material that is packaged, identified, and issued, as a single item under one National Stock Number.
Replaced Removing a component from aviation systems or associated mission equipment and installing a different component in its place.
Retirement Change (RC)
Item An item assigned a safe maximum allowable operating time since new that it maybe used (referred to as a MAOT).
Salvage Materiel classified as condemned that has some value in excess of its basic material content. It may contain serviceable components that have the potential of being repaired or altered by the purchaser to increase its value.
Scrap Materiel classified as condemned that has no value except its basic material con- tent.
Standards of Serviceability Wear limits, fits, tolerances and specifications contained in aircraft, component, or general maintenance manuals or DMWRs that are used to determine the condition of an aircraft or component, and used to determine the maintenance required to assure a high degree of serviceability, availability and safety.
Thorough Inspection A comprehensive visual examination and evaluation of an item with established standards and specifications. This type inspection is performed to prove service- ability or to determine the extent of damage/deterioration. Disassembly will be kept to the minimum.
Thrust/Weight Bearing
Components Components attached to the airframe that are used to physically lift the aircraft/UAor provide thrust to rotate the aircraft/UA; for example, the forward transmission, forward accessory gear box, aft accessory gear box.
Time Between Overhaul
(TBO) The established maximum usage interval since new or overhaul, that an item maybe operated before it must be removed from service and returned to a depot level facility.
Time Change (TC) Item An item assigned a safe maximum allowable operating time between overhaul be- cause of safety and/or design limitations. The item must be replaced with a fully serviceable item after the expiration of the specified operating time interval and overhauled.
Transfer Move accountability from one organization to another organization.
Transfer Standards of
Serviceability The established amount of maintenance, inspection and component time that willensure ample flight hours are remaining to satisfy immediate operational and logis- tical requirements within CONUS, OCONUS and/or combat operations at time of transfer.
Transferring activity The unit or activity that is losing accountability for the aviation system and/or asso- ciated mission equipment to another activity.
Un-Programmed Depot
Maintenance Level Repair Repairs that may occur between scheduled depot maintenance due to the repairbeing allocated to depot level in the Maintenance Allocation Chart (MAC) or it is required maintenance that cannot be accomplished by the supporting units due to capacity or capability. A depot maintenance action that corrects a specific fault or deficiency.
By Order of the Secretary of the Army:
RAYMOND T. ODIERNO
General, United States Army Chief of Staff
Official:
JOYCE E. MORROW
Administrative Assistant to the Secretary of the Army
1209302
Distribution:
To be distributed in accordance with the initial distribution number (IDN) 313115, requirements for TM 1-1500-328-23.