Processing Reliability Data for ATA #
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In this page, you can process the reliability data for the ATA by calculating the alert value. The system displays fleet details such as the fleet number, reliability calendar code, the validity of the reliability calendar and the last uploaded date. The ATA chapter number is also displayed in the multiline.
Select the “Process Reliability Data for ATA #” link at the bottom of the “Process Reliability Data for Fleet #” page.
The “Process Reliability Data for ATA #” page appears.
The system displays the following:
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Date Format |
The format in which the date fields must be entered. This format is displayed from the "User Preferences" business component based on the login user ID. In case the format is not defined, the system displays the date format from the “Enterprise Modeling” business component by default. |
The system displays the following field in the “Fleet Details”:
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Fleet # |
A unique number assigned to the fleet. |
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Reliability Calendar Code |
The number identifying the reliability calendar. |
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Cal Valid From Month – Year |
The year and month from which the reliability calendar starts. |
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Cal Valid To Month – Year |
The year and month in which the reliability calendar ends. |
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Period # |
The number identifying the reliability period. |
The system displays the following the in the “ATA Details” multiline.
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ATA # |
A unique number identifying the system in the aircraft. |
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Chapter Description |
The textual description of the ATA chapter. |
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Last Calculated Date |
The date on which the reliability alert for the ATA was last calculated. |
Click the “Calculate Alert Value” pushbutton to calculate the reliability alert value for ATA.
The system calculates for the Monthly Alert Value, and the Reliability Alert from the details existing in the “Reliability Set Up” repository, for the selected period and ATA chapter.
Monthly Alert Value Defect Rate is calculated as,
Number of discrepancy reported for the respective period * 100 / Period Flying Hours
If the selected period is the last period defined for the calendar fleet:
Reliability Alert is calculated as,
D + Multiple for service level as selected in set options * B
Where, D is them mean defect rate for the calendar.
D = R / number of periods
Where, R is the sum of defect rate of all the periods existing in the calendar.
B = Square root of A
Where, B is the standard deviation.
A = J / M
M = Number of Periods - 1
J = H - K
Where, H is the sum of the square of defect rate for all respective periods.
K = Q / Number of Periods
Where, Q is the square of the sum of defect rate.
To proceed, carry out the following
Select the “Process Reliability Data for Part #” link at the bottom of the page to process the reliability data for part number.
