text: Chapter 5
  AVIATION MAINTENANCE COMPANY/TROOP
  5-200. The aviation maintenance company/troop manages the battalion/squadron maintenance program,
  operates a centralized tool room, and performs field-level maintenance and scheduled services. The primary
  mission of the aviation maintenance company/troop is to sustain combat power in support of the
  battalion/squadron mission. The aviation maintenance company/troop conducts field-level maintenance,
  troubleshoots airframe and component malfunctions, performs maintenance and repair actions, removes and
  replaces aircraft components, and performs maintenance test flights and maintenance operational checks.
  5-201. The aviation maintenance company/troop provides sustainment support by processing, requesting,
  and storing Class IX shop stock and bench stock. Supply personnel operate unit-level Army logistics
  information systems and requisition and manage the battalion/squadron Class IX (Air) serviceable spares.
  The aviation maintenance company/troop performs unit-level repairs on aviation life support systems.
  Aviation maintainers operate and maintain assigned ground support equipment.
  5-202. During defensive operations, the aviation maintenance company/troop must remain mobile and be
  prepared to move often to provide responsive support and repair to the supported battalion/squadron. The
  aviation maintenance company/troop possesses enough organic vehicles to transport 75 percent of its table
  of organization and equipment in a single lift and will require external support coordinated through the
  battalion and brigade staff to move the remaining 25 percent.
  5-203. Maintenance assets will move as far forward as the tactical situation permits to repair unserviceable
  and damaged aircraft to return them to the fight as quickly as possible. The aviation maintenance
  company/troop utilizes field maintenance teams and split-based operations to conduct both scheduled and
  unscheduled maintenance to meet the maintenance requirements for their supported battalion/squadron.
  When mission requirements exceed aviation maintenance company/troop capacity, the company coordinates
  with the ASB to receive additional field maintenance teams from the ASB’s aviation support company.
  AREA DEFENSE
  5-204. Area defense is a defensive operation that concentrates on denying enemy forces access to designated
  terrain for a specific time rather than destroying the enemy outright (ADP 3-90). The focus of the area defense
  is on retaining terrain where the bulk of the defending force positions itself in mutually supporting, prepared
  positions. Units maintain their positions and control the terrain between these positions.
  SUSTAINMENT PREPARATION FOR AREA DEFENSE
  5-205. To the extent possible, sustainment operators deliver combat-configured loads to maneuver units on
  a scheduled basis during the area defense. Combat-configured loads are packages of potable and non-potable
  water; CBRN defense supplies; barrier materials; ammunition; POL; medical supplies; and repair parts
  tailored to a specific size unit. This eliminates the need to request supplies and reduces the chance that a lapse
  in communications will interrupt the sustainment flow and jeopardize the integrity of the defense. The
  commander resupplies the supported maneuver unit using this push system until it requests otherwise.
  Commanders use sustainment information systems to accurately tailor these combat-configured push
  packages to the demands of the supported maneuver units.
  5-206. In contiguous operations, the commander positions echelon sustainment facilities farther away from
  the forward edge of the battle area in a defense than in the offense to avoid interfering with the movement of
  units between battle positions or the forward movement of counterattack forces. These facilities are located
  far enough behind friendly lines that likely enemy advances will not compel the relocation of critical
  sustainment capabilities at inopportune times. However, those sustainment capabilities supporting the unit
  are located close enough to provide responsive support. In noncontiguous operations, the commander
  positions sustainment facilities in bases and base clusters within the perimeters of ground maneuver units to
  provide security and avoid interrupting their sustainment functions.
  5-207. Commanders provide maintenance support as far forward as possible at maintenance collection points
  to reduce the need to evacuate equipment. The thrust of the maintenance effort is to fix as far forward as
  possible those systems that can be quickly returned to the unit in combat-ready condition, as sustainers focus
  on preparing the defensive force to go on the attack. Commanders ensure that multifunctional forward