TM 1-2840-252-23-2
3-8
INSTALL COMBUSTION SECTION AND POWER TURBINE (AVIM) (Continued)
3-8
3.
Calculate axial clearance between second turbine
disc assembly (12) and third turbine nozzle (5) as
follows
a.
Place locating bar (T33) (6) on combustion
chamber mounting flange (7). Measure from top
of locating bar (T33) (6) to third turbine nozzle
inner shroud (13). Subtract thickness of locating
bar (T33) (6). Record as dimension A.
b.
Place locating bar (T33) (6) on second turbine
disc assembly aft face (9). Measure from top of
locating bar (T33) (6) to outer aft face of disc next
to blade platform (14). Record as dimension B
Measure from top of locating bar (T33) (6) to air
diffuser outer flange (11). Record as dimension C
Subtract dimension B from dimension C. Record
result as dimension D.
c.
Subtract dimension D from dimension A Result is
axial clearance. Axial clearance shall be 0.066
inch minimum.
If axial clearance cannot be met, replace
d.
power turbine combustor chamber shim (Ref.
INSPECT
GO TO NEXT PAGE
3-98
