AMP Driven Maintenance Standards
Whilst the Operators CAMO is responsible for the delivery of an effective and viable maintenance planning process, it is the EASA part 145 Aircraft Maintenance Organisation (AMO) which has the responsibility to perform the maintenance in accordance with the work package.
EASA AMP Obligations
EASA requires Operator Reviews of Validity and Effectiveness of the AMP - EASA Annex I – Part M - Subpart C - M.A. 302 Aircraft Maintenance Programme - (g) … The aircraft maintenance programme shall be subject to periodic reviews and amended accordingly when necessary. These reviews shall ensure that the programme continues to be valid in light of the operating experience.
Operators are able to strongly influence the success of a continuous development of scheduled maintenance program data but providing a virtuous circle of feedback to the Type Certificate Holder (TCH), A continuous review of TCH and Original Equipment Manufacturer (OEM) service bulletins, reliability data, service letters, airworthiness directives provides source material for optimisations.
A major challenge is for the CAMO Quality Control (QC) process is to assess the effectiveness of the total maintenance planning and maintenance delivery process which is crucial to ensuring that all objectives are met.
Considering Optimization
One example of a process to support the observation of the total cost of maintenance is to deploy statistical techniques to identify the opportunities to optimise the packaging and delivery process whilst ensuring the maintenance system dependability.
Utilization Factors can result in FH, FC and calendar-based tasks not aligning for packaging purposes. In addition Operators check packaging often designed to meet the least common denominator of the individual tasks within the package as a result the tasks are not necessary optimised for economic benefit.
Successful engagement in this process offers the ability to maintain airworthiness through maintenance optimization with an additional potential benefit of a reduction in maintenance costs and unscheduled defects.
One key performance indicator related to effective validation of the Aircraft Maintenance Program requires careful analysis of the Reliability Program.
Assessing the actual cost of Aircraft Maintenance is an essential feature of the overall assessment process considering:
a) How many man hours are required for a given series of maintenance tasks
b) How effective is the task packaging process to minimise down time
c) How efficient is the supply chain process to ensure on time availability of required tools, equipment, parts and materials
Typical improvements to the MPD are driven through the MRB review process and are based on the analysis of in ‑ service data collected from the worldwide fleet. These improvements optimize the content and interval of maintenance tasks identified in the MPD whilst at the same time continuing to maintain safety and reliability as well as to achieve cost efficiencies.
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