Which sequence correctly lists the maintenance echelons from first to fifth?

Which sequence correctly lists the maintenance echelons from first to fifth?

• A. Organizational, Intermediate, 3rd Echelon: Diagnosis/parts replacement, 4th Echelon: Calibrate, align, repair, Depot/5th Echelon: Major overhaul or rebuild
• B. Organizational, Depot/5th Echelon, Intermediate, 3rd Echelon, 4th Echelon
• C. Depot/5th Echelon, 4th Echelon, 3rd Echelon, Intermediate, Organizational
• D. Organizational, 4th Echelon, 2nd Echelon, 3rd Echelon, Depot/5th Echelon

Answer: (A)

Maintenance echelons are arranged in ascending order of capability, moving from on-site, routine work to the most comprehensive, depot-level tasks. At the first level, units perform Organizational maintenance—routine checks, basic upkeep, and minor repairs right where the equipment is used. The next level up is Intermediate, a base or field facility that handles more extensive servicing than the unit can, still closer to the operator than higher-level shops. The third echelon takes on diagnostic work and parts replacement that the unit and unit-level technicians can’t complete. The fourth echelon covers calibration, alignment, and repairs that require specialized tools and procedures. The fifth echelon, Depot, handles major overhauls or rebuilds. So the sequence from first to fifth is Organizational, Intermediate, 3rd Echelon (diagnosis/parts replacement), 4th Echelon (calibrate, align, repair), Depot/5th Echelon (major overhaul or rebuild). Other sequences violate this progression by moving depot ahead of the intermediate levels or misplacing the 3rd and 4th echelons, which doesn’t reflect how repair capability escalates across echelons.

Maintenance echelons are arranged in ascending order of capability, moving from on-site, routine work to the most comprehensive, depot-level tasks. At the first level, units perform Organizational maintenance—routine checks, basic upkeep, and minor repairs right where the equipment is used. The next level up is Intermediate, a base or field facility that handles more extensive servicing than the unit can, still closer to the operator than higher-level shops. The third echelon takes on diagnostic work and parts replacement that the unit and unit-level technicians can’t complete. The fourth echelon covers calibration, alignment, and repairs that require specialized tools and procedures. The fifth echelon, Depot, handles major overhauls or rebuilds.

So the sequence from first to fifth is Organizational, Intermediate, 3rd Echelon (diagnosis/parts replacement), 4th Echelon (calibrate, align, repair), Depot/5th Echelon (major overhaul or rebuild). Other sequences violate this progression by moving depot ahead of the intermediate levels or misplacing the 3rd and 4th echelons, which doesn’t reflect how repair capability escalates across echelons.