4-36 INSTALL FOURTH STAGE POWER TURBINE ROTOR (AVIM) (Continued)
24. Check axial clearance between fourth stage
power turbine rotor (4) and fourth stage power
turbine nozzle (24) at blade roots (43). Use
0.104 inch and 0.228 inch bent wire gage
(Appendix E) (44) inserted between fourth
stage power turbine rotor blades (45). Axial
clearance shall not be less than 0.104 inch or
more than 0.228 inch.
If axial clearance is not within limits, do
steps 13 through 24. Ring spacer may be
installed or removed as necessary. Recheck
clearance. If clearance still is not within
limits, replace power turbine assembly
(Ref. Task 3-6 and 3-7).
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