Which of the following is NOT a level of maintenance in the Army?

Operational support is not recognized as a formal level of maintenance in the Army. The Army identifies maintenance levels to ensure equipment readiness through a structured approach to repairs and services. Maintenance is organized into four primary levels: unit maintenance, general support maintenance, direct support maintenance, and depot maintenance.

Unit maintenance is performed by the operators or unit maintenance personnel on equipment within their unit, primarily dealing with routine checks and minor repairs. General support maintenance is provided by higher-level maintenance organizations and can cover multiple units, focusing on more complex repairs and services. Depot maintenance involves comprehensive repairs and overhauls that require specialized facilities, tools, and trained personnel, often for serious deficiencies or extensive failures.

Since "operational support" does not correspond to a defined category of maintenance within these recognized levels, it is identified as the incorrect option. Understanding these structures is crucial for promoting efficiency and effectiveness in Army logistics and equipment management.