Gas turbine engine probes and methods of detecting an engine condition

A method of detecting a blockage condition in a turbine section of a gas turbine engine comprising port adjacent the turbine section, the method comprising the steps of:

• providing a housing comprising at least one passage;
• mounting the housing in the borescope port such that the passage is in fluid communication with an engine coolant flow path and an engine main flow path;
• operating the gas turbine engine in a working operational mode;
• and
• detecting a condition of the housing to obtain an indication of engine blockage.

A probe, comprising:

• a housing adapted to be secured in a borescope plug of a gas turbine engine wherein the housing comprises an inner passage that is adapted to conduct coolant through the housing;
• an inner tube surrounding the inner passage;
• an outer passage surrounding the inner tube;
• an outer housing portion surrounding the outer passage;
• a plurality of holes extending through the inner tube from the inner passage to the outer passage;
• at least one outlet port extending outwardly from the outer passage and adapted to conduct coolant into an engine main flow path;
• at least one sensor carried by the housing and in fluid communication with the coolant, wherein the at least one sensor is adapted to develop an output signal representing a condition of the turbine section;
• and
• a circuit coupled to the at least one sensor, the circuit adapted to develop an indication of engine blockage from the output signal.