Figure 3-24. Repair of turbine plenum.
(a) Repair cracks, such as item 1,
sheet 1 of 2) as follows:
progression of crack, then welding per Military
(a) Weld repair cracks to Military
Specification MIL-W-8611 using Inco 62 per AMS5679,
Hasteloy W per AMS5786 or Inco 92A per AMS5676.
All inside flow areas shall be free of excess weld.
Specification MIL-W-8611. Patches shall be 0.040 inch
(b) Repair cracks in nozzle mating
minimum thickness and shall overlap the crack a
minimum of 0.050 inch minimum, no patches allowed
Material removal, not to exceed two inches in length, is
inside plenum. Do not overlap patches.
permissible at one location only.
Cracks within the forged portion
of torus are not repairable.
Condemn the torus if such
damage is found.