Aircraft auxiliary power unit fuel supply circuit equipment surveillance method and device
AssigneeAirbus Operations GmbH
InventorThomas CAILLOL
Life of this patent
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Abstract
A method and a system for surveillance of equipment in a fuel supply circuit of an auxiliary power unit of an aircraft. The method includes determining if the fuel supply circuit was during a predetermined period in a configuration such that these conditions were satisfied: (i) the auxiliary power was in an “on” operating state, and ii) the fuel supply circuit was in a “trim tank fueling” operating mode, and (iii) the trim tank had an “empty” fuel filling status, then determining a duration for which the configuration was maintained and, if the duration is above a first predetermined threshold, storing an event, and if a number of events stored is above a second predetermined threshold generating an alert message.
Claims7
A method for surveillance of an equipment unit of a fuel supply circuit of an auxiliary power unit of an aircraft, said method being implemented by a surveillance device comprising electronic circuitry, said method comprising:
- determining when said fuel supply circuit was in a configuration during a predetermined period P in which these following conditions were fulfilled:
- (i) said auxiliary power unit was in an “on” operating state, and
- (ii) said fuel supply circuit was in a so-called “trim tank fueling” operating mode, and
- (iii) said trim tank had a so-called “empty” fuel filling status;
- for each time that the fuel supply circuit was in said configuration, determining a duration D during which said configuration was maintained and, when said duration D determined is above a first predetermined threshold, storing an event indicating that said determined duration D was above the first predetermined threshold;
- and,
- determining for said predetermined period P a number of events stored and when said number of events determined is above a second predetermined threshold generating an alert message.
A device for surveillance of an equipment unit of a fuel supply circuit of an auxiliary power unit of an aircraft, said device including electronic circuitry configured to:
- determine when said fuel supply circuit was in a configuration during a predetermined period P such that the following conditions were fulfilled:
- (i) said auxiliary power unit was in an “on” operating state, and
- (ii) said fuel supply circuit was in a so-called “trim tank fueling” operating mode, and
- (iii) said trim tank had a so-called “empty” fuel filling status;
- for each time that the fuel supply circuit was in said configuration, determine a duration D during which said configuration was maintained and, when said duration D determined is above a first predetermined threshold, to store an event indicating that said determined duration D was above the first predetermined threshold;
- and,
- determine for said predetermined period P a number of events stored and when said number of events determined is above a second predetermined threshold generating an alert message.
Dependencies are inferred from the claim text.