Abstract: A particulate sample collector for collecting a particulate sample deposited on a surface of a gas turbine engine component. The particulate sample collector comprises a collection media support, itself comprising a support surface that supports a collection media between an inlet of the particulate sample collector and an exit of the particulate sample collector. The inlet is comprised within the hollow body. The inlet and exit are fluidically coupled. The exit is comprised within either the hollow body or the collection media support. An airflow carrying the particulate sample enters the particulate sample collector at the inlet, so that the collection media collects the particulate sample. The airflow then exits the particulate sample collector at the exit.

Abstract: A method includes: determining first atmospheric agents that are predicted to be ingested by a gas turbine engine during operation in a predefined route of an aircraft and their composition, particle size, and concentration; determining a composition and an amount of a predicted deposit that is predicted to form on the component based on the composition, the particle size, and the concentration of the first atmospheric agents; determining a predicted damage to the component based at least on the composition and the amount of the predicted deposit and a composition of a coating of the component; determining locations at which second atmospheric agents are present in air that reduce the predicted damage to the component and their composition, particle size, and concentration; determining an alternative route including the locations; and operating the gas turbine engine at the locations in the alternative route.

Abstract: A method for reducing damage to a component of a gas turbine engine includes: determining one or more atmospheric agents that are predicted to be ingested by the gas turbine engine during operation and their concentration; determining a composition and an amount of a predicted deposit that is predicted to form on the component based on the concentration of the one or more atmospheric agents; determining a predicted damage to the component based at least on the composition and the amount of the predicted deposit, and a composition of a coating of the component; determining an additive and its concentration based on the composition and the amount of the predicted deposit and the predicted damage, such that the additive changes at least one of thermochemical and thermomechanical properties of the predicted deposit to reduce the predicted damage to the component; and applying, in-situ, the additive to the component.

Abstract: A gas turbine engine and an apparatus for operating the gas turbine engine includes at least one microphone to detect the sound of impacts of particles, a recorder to record the sound of the impacts, an analyzer to analyze the sound of the impacts of the particles, and a store of sounds of impacts, the stored sounds of impacts correspond to unfavorable weather conditions. A comparator compares the sound of the impacts of particles with one or more sounds of impacts stored in the store 68 sounds of impacts and if the comparator determines that the sound of the impacts of particles matches one or more stored sounds of impacts, a signal is sent to a control system for the gas turbine engine to adjust the operation of the gas turbine engine such that it operates in a safe mode of operation.

Abstract: A gas turbine engine and an apparatus for operating the gas turbine engine includes at least one microphone to detect the sound of impacts of particles, recorder to record the sound of the impacts, an analyser to analyse the sound of the impacts of the particles, and a store of sounds of impacts, the stored sounds of impacts correspond to unfavourable weather conditions. A comparator compares the sound of the impacts of particles with one or more sounds of impacts stored in the store 68 sounds of impacts and if the comparator determines that the sound of the impacts of particles matches one or more stored sounds of impacts, a signal is sent to a control system for the gas turbine engine to adjust the operation of the gas turbine engine such that it operates in a safe mode of operation.