Review Fault Thresholds

Explanation

Use this activity to review fault thresholds so recurring faults on a system are not missed when you plan the next maintenance window. This is a general process in 7.46.1.1 Review all Upcoming Maintenance Requirements. It is not in the main sequence of open-task, open-fault, and opportunistic-task review. See Line Maintenance Planning.

A fault threshold sends an alert when a specified number of faults occur against a system within a specified number of days. For example, five faults in three days against system 28-00. Each time a fault is raised, CAMO checks whether a fault threshold exists for that configuration slot or any parent configuration slot. If a threshold exists, CAMO increments the fault total.

Faults designated as no fault found, raised in error, or possible faults are not added to the total. You can also limit a threshold to specific tail numbers by specifying an applicability range.

Threshold mode is either of the following:

• Fleet — The count is the sum of faults across all assets of the selected assembly type. For example, all aircraft of type B737.
• Assembly — The count applies to any single asset of that assembly type. For example, one B737 that exceeds the limit.

When the threshold is exceeded for the specified period, an alert is sent to all roles assigned to the alert.

This activity is not available on IFS Cloud Web. Review existing thresholds in CAMO. Do not use due date, extended due date, usage due, or overdue on the Open and Deferred Fault page as the definition of a fault threshold. Those fields belong to the due-before-next-window check. See Review Aircraft Open Faults.

This activity is a review. It does not create a fault threshold.

Prerequisites

• You must have access to CAMO.
• Your role must include the Fault Thresholds to-do list tab. If the tab is not displayed, it is a role or permission issue.
• To receive threshold alerts, your role must be assigned to the alert.

Procedure

Review fault thresholds in CAMO

1. Sign in to CAMO.
2. On your to-do list, select the Fault Thresholds tab.
3. Review the existing thresholds, including assembly, system or configuration slot, number of faults allowed, number of days, Fleet or Assembly mode, and any applicability range.
4. If a threshold alert has been sent, review which system exceeded the count and over which period.

To see how to create a fault threshold, refer to Line Maintenance and MOC / managing faults and shop findings / Create fault thresholds in the IFS CAMO user guide. Creating a threshold is not part of this review.

Review related open faults on IFS Cloud Web

Use this procedure after a threshold alert, to see the related open and deferred faults. These pages are not the fault threshold list.

1. Go to Aviation Maintenance > Fleet Management > Faults Management > Open and Deferred Faults.
2. Search by assembly code or registration code, and then review faults for the system that exceeded the threshold. See Review Aircraft Open Faults.
3. If required, use Fault Search in Line Maintenance Execution to search a wider set of faults. See Fault Search.

System Effects

• None. Reviewing fault thresholds does not create or change a threshold and does not change a fault.
• When a threshold is exceeded, CAMO sends an alert to the roles assigned to that alert.