Table 2-2.—Area Visible From Borescope Inspection Portsof the borescope inspection ports are showni n f i g u r e 2 - 7 .CompressorFifteen borescope inspection ports are in thecompressor near the 3 o’clock split line. A port islocated at every compressor stator stage. These vaneports start at the IGVs and work aft in the same directionas the airflow (except for stage 8, which is internallyblocked). Stator stages 9 and 13 borescope ports requireyou to remove piping interferences.Combustor and HP TurbineAft of the right-hand side compressor ports are sixcircumferentially positioned ports, just forward of themidflange of the compressor rear frame. From theseports you can inspect the combustor, the stage 1 HPturbine nozzle assembly, and a few fuel nozzles. Nearthe aft flange of the compressor rear frame on theright-hand side of the engine are two HP turbine statorports that you can use for viewing the air-cooled turbineblades. The Pt5.4 pressure probe harness adjacent to theafter flange of the turbine midframe is located aft of the2-5
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