MIL-STD-1798C
uncharacterized materials, characterization testing shall be conducted in accordance with (insert reference). Asbestos seals and clamps are examples of items which must be replaced.
Depleted uranium flight control counter-weights must be refurbished to prevent hazardous materials contamination. Paint, plating, cleaning, and corrosion control systems must be
updated. The MECSIP Manager shall receive periodic briefings on environmental changes to ensure safe maintenance and operational procedures.
5.5.3.10.5 Update the CSI list.
The CSI list shall be updated if the modification involves CSIs.
5.5.3.11 Tasks for Commercial Derivative Aircraft programs maintained via Contract
Logistics Support (CDA/CLS).
Commercial Derivative Aircraft programs maintained via Contract Logistics Support (CDA/CLS) contain unique MECSIP Tasks. The subsystem design and aircraft maintenance plan for these aircraft are part of the FAA-certified baseline aircraft and the DoD accepts these as fundamentaly safe for operations within similar environments. In addition a CLS maintenance approach assigns the responsibility for achiving the desired level of availability to the contractor.
When the DoD acquires a CDA and operates it as a military aircraft (with a military airworthiness certificate), it becomes a "Public Use Aircraft" and is exempt from mandatory FAR compliance
and FAA oversight. However, the use and compliance of applicable FARs may be required by
the specific service (as detailed by the AFI 21-101 for the USAF). As such, CDA are maintained as closely as possible to the FAA (airworthiness) type certificate requirements except for CDA
whose primary mission is the transport of passengers. Commercial Derivative Aircraft whose
primary mission is the transport of passengers shall be FAA type certified and maintained for the life of the air system.
5.5.3.11.1 Maintenance Planning Data (MPD) Document.
The Single Manager (SM) shall maintain or have access to a current copy of pertinent OEM MPD Document for reference. To support maintenance of the type certificate (which indicates the airplane will be maintained in a condition of airworthiness equal to its certified or properly altered condition), the aircraft manufacturer/OEM provides a MPD Document to operators. The MPD includes both FAA mandatory requirements and OEM recommended (non-mandated) requirements. Mandated tasks are the Certification Maintenance Requirements (CMRs) and Airworthiness Limitations. Other tasks originate from the Maintenance Review Board (MRB) report (which includes tasks derived through MSG analysis, RCM analysis, or other FAA- approved methodology), Service Actions, and other OEM information. The MPD will also address corrosion, structural fatigue/durability, and critical system/part reliability concerns.
5.5.3.11.2 CDA Maintenance Program.
The SM shall develop and sustain a customized scheduled maintenance program based on the applicable OEM MPD document. The purpose of the MPD document is to provide operators with data needed to develop a customized scheduled maintenance program. As such, CDA Program Offices accept the MPD document as the initial scheduled maintenance baseline (by which the FAA type certificate is maintained) and incorporate MPD tasks into a tailored scheduled maintenance program. FAA-mandated inspection requirements and inspection intervals are upheld for CDA and/or changes approved by FAA accordingly. MPD tasks not mandated by FAA are typically incorporated too because OEM's recommendations usually represent best available, "initial" recommendations to optimize maintenance program for cost, reliability, maintainability, etc. With the exception of FAA mandated requirements (which includes MPD revisions and service actions), maintenance program task changes and
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