performed at this level includes line operations, such as servicing, preflight inspections, and minor adjustments in preparation for flight; periodic inspections of aircraft and equipment and the associated tests, repairs, and adjustments that do not require shop facilities; and component removal and installation. This work is done in facilities assigned to the operating units. These facilities may be used exclusively by a single large squadron or they may be shared by one or more smaller units. In an operating activity, permanently assigned personnel perform O-level maintenance. O-level maintenance at a naval air station (on aircraft assigned to the station) is a function of the operations maintenance division (OMD). When directed by higher authority, the OMD also provides O-level maintenance and other assistance to transient aircraft. Intermediate-level maintenance is work performed in centrally located facilities for the support of operating activities within a designated geographical area. I-level maintenance work is performed at a particular base or station, or aboard aircraft carriers (CVs/CVNs), and amphibious assault ships (LHDs/LHAs/LPDs). This level of maintenance consists of calibration, off-equipment repair, or replacement of damaged or unserviceable components or assemblies. It also consists of the manufacture of nonavailable parts, periodic inspections, and technical assistance on aircraft components and equipment from supported units. NOTE: The aircraft I-level maintenance department is commonly referred to as the SUPPORTING activity, and the O-level maintenance activity (squadron) is referred to as the SUPPORTED activity. I-level maintenance activities are manned by a small number of permanently assigned personnel and sea operational detachment (SEAOPDET) personnel, a sea duty component assigned to the shore AIMD, used to augment the aircraft carrier AIMD in support of carrier air wing embarkations. Personnel assigned TAD to intermediate maintenance activities (IMAs) from non-CV deploying squadrons or shore IMA SEAOPDETs should be assigned for the complete deployment cycle. Shore-based Navy squadrons who have I-level billets authorized should assign personnel to the supporting IMA for a minimum of 12 months. Depot maintenance is work that must be done in industrial-type facilities. Navy depot maintenance activities are manned primarily by civilians, and are known as naval aviation depots (NAVAVNDEPOTs or NADEPs). The Commander, Naval Air Systems Command (COMNAVAIRSYSCOM or NAVAIR) manages NADEPs. This level of maintenance (standard depot-level maintenance or SDLM) includes overhaul and major repair or modification of aircraft, components, and equipment. It also includes the manufacture of specified aeronautical parts to be stocked as spares, the manufacture of kits for authorized aircraft and the modification of equipment. Installation of these spare parts and incorporation of modification kits may be done at this level or at a lower level of maintenance. Depot-maintenance activities also perform special rework. Some military personnel are usually assigned to the NADEPs for training or to help in performing the I- and O-level maintenance connected to the depot facility. You can see by the above descriptions that the three levels of aircraft maintenance provide an orderly separation of the various maintenance tasks. These three separate levels of maintenance are needed because of task and equipment complexity, space requirements, the skill level of the assigned personnel, and the scope of support responsibility. Q10. Q11. Q12. Q13. Q14. Aircraft maintenance functions are divided into how many distinct levels? What are the distinct levels of aircraft maintenance? Describe organizational-level maintenance. What level of maintenance includes the manufacture of non-available parts? Depot-level maintenance is performed in what type of facility? Responsibilities The Chief of Naval Operations (CNO) sponsors and directs the NAMP. Program administration is through the operational chain of command. The Naval Supply Systems Command (NAVSUP) provides material in support of the operation and maintenance of aeronautical equipment. NAVAIR is responsible for research, design, development, testing, acquisition, and logistic support of all naval aviation procurement relating to aircraft missile targets and associated material and equipment. Some activities may be assigned the intermediate maintenance responsibility for an entire logistic area if requested by the cognizant controlling custodian. Specific activities designated to perform intermediate maintenance are authorized to 1-3