Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3899

c) a margin between the continuity of service objective and that achieved is required in order to reduce the chance of falsely rejecting the suitability of an equipment for a particular level of service due to statistical uncertainty. Note.— The Level 3 and 4 continuity of service values include a factor that accounts for the pilot s capability to avoid a fatal accident in the event of a loss of guidance. It is particularly desirable to reduce this factor to the maximum extent practical by achieving the best possible continuity of service for Level 3 and 4 equipment. 11.2.8 Experience has shown that there is often a difference between the calculated continuity of service and that experienced in an operational environment both because the performance of the equipment may be different from the calculated value and because of the impact of operational factors, i.e. airport environment, inclement weather conditions, power availability, quality and frequency of maintenance, etc. For these reasons, it is recommended that the equipment MTBF and continuity of service be confirmed by evaluation in an operational environment. Continuity of service may be evaluated by means of mean time between outages, where an outage is defined as any unanticipated cessation of signal-inspace. It is calculated by dividing total facility up-time by the number of operational failures. For integrity and continuity of service Levels 2, 3 or 4, the evaluation period is to be sufficient to determine achievement of the required level with a high degree of confidence. To determine whether the performance record of an individual equipment justifies its assignment to Levels 2, 3 or 4 requires judicious consideration of such factors as:

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