GE MS-6001B - MS-6001 B DLN-1 Borescope Access Holes Location

Scheduled Turbine MaintenanceInspection and Maintenance — GEK 107048
STM-17
Table 4-2
MS-6001B DLN-1 Borescope Access Holes Location
Location
Casing Hole
Thread Size
*Dimension From Forward
Face of Compressor
Discharge Case Flange
Number
of Holes
Seventeenth-stage
compressor
1.00-8UNC-2B 18.7 in. (Forward) 1
Combustion liners 3/4 in. NPT Combustion outer
casing radial outside
10
First-stage nozzle
trailing edge &
first-stage bucket
leading edge
1.50-8UN-2B 26.4 in. (Aft) 8
Second-stage nozzle
leading edge &
first-stage bucket
trailing edge
1.50-8UN-2B
Eddy Current &
Borescope
29.3 in. (Aft) 1
Second-stage nozzle
trailing edge &
second-stage bucket
leading edge
1.00-8UNC-2B
1.50-8UN-2B
Nozzle Deflection Only
36.2 in. (Aft)
36.4 in. (Aft)
3
1
Third-stage nozzle
leading edge &
second-stage bucket
trailing edge
1.50-8UN-2B
Eddy Current &
Borescope
39.1 in. (Aft) 1
Third-stage nozzle
trailing edge &
third-stage bucket
leading edge
0.75-10UNC-2B 46.3 in. (Aft) 4
Forward
Aft
Turbine Shell
Compressor
Discharge Casing