Decision making process and manual for diagnostic trend analysis
First Claim
1. A decision making process for evaluating performance shifts identified during a diagnostic trend analysis of data obtained from a gas turbine engine, said process comprising the steps of:
- determining whether each performance shift is actionable; and
determining what maintenance action is required for actionable performance shifts by identifying potential causes of said actionable performance shifts and ranking said identified potential causes in most likely order.
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Accused Products
Abstract
A decision making process for evaluating performance shifts identified during a diagnostic trend analysis of gas turbine engine data includes first determining whether each performance shift is actionable, and then determining what maintenance action is required for actionable performance shifts. The maintenance action is determined by identifying potential causes of the actionable performance shifts and ranking the identified potential causes in most likely order. A manual is provided for guiding a user through the decision making process. The manual includes a flow chart flow chart setting forth the steps of the decision making process and a number of tables used in the process. The tables include a false data check table having a number of questions designed to determine whether performance shifts can be attributed to a cause not related to an engine condition requiring maintenance, a persistence and magnitude table for indicating whether a performance shift'"'"'s persistence and magnitude is sufficient to consider taking action on the performance shift, a notification criteria table having a number of questions designed to determine whether the gas turbine engine data indicates that an urgent condition may exist, and traditional and historical pattern match tables that identify potential causes of performance shift.
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Citations
28 Claims
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1. A decision making process for evaluating performance shifts identified during a diagnostic trend analysis of data obtained from a gas turbine engine, said process comprising the steps of:
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determining whether each performance shift is actionable; and
determining what maintenance action is required for actionable performance shifts by identifying potential causes of said actionable performance shifts and ranking said identified potential causes in most likely order. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A decision making process for evaluating performance shifts identified during a diagnostic trend analysis of data obtained from a gas turbine engine, said process comprising the steps of:
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determining whether each performance shift can be attributed to a cause not related to an engine condition requiring maintenance;
for performance shifts that cannot be attributed to a cause not related to an engine condition requiring maintenance, checking the persistence and magnitude of each performance shift;
for performance shifts not having a sufficient persistence and magnitude, determining for each performance shift whether said gas turbine engine data indicates that an urgent condition may exist;
for performance shifts having a sufficient persistence and magnitude or where said gas turbine engine data indicates that an urgent condition may exist, determining whether said gas turbine engine has been subject to a recent maintenance action;
where said gas turbine engine has been subject to a recent maintenance action, determining if each performance shift can be attributed to said recent maintenance action;
for performance shifts that cannot be attributed to said recent maintenance action and that have a sufficient persistence and magnitude, determining for each performance shift whether said gas turbine engine data indicates that an urgent condition may exist;
for performance shifts that cannot be attributed to said recent maintenance action, using traditional and historical performance shift patterns to identify potential causes of each performance shift; and
subsequently ranking said identified potential causes in most likely order. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A manual for guiding a user through a decision making process for evaluating performance shifts identified during a diagnostic trend analysis of data obtained from a gas turbine engine, said manual comprising:
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a flow chart flow chart setting forth the steps of said decision making process;
a false data check table having a number of questions designed to determine whether performance shifts can be attributed to a cause not related to an engine condition requiring maintenance;
a persistence and magnitude table for indicating whether a performance shift'"'"'s persistence and magnitude is sufficient to consider taking action on said performance shift;
a notification criteria table having a number of questions designed to determine whether said gas turbine engine data indicates that an urgent condition may exist; and
traditional and historical pattern match tables that identify potential causes of performance shift. - View Dependent Claims (25, 26, 27, 28)
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Specification