TM 55-2840-254-23
4-51 INSPECT THIRD STAGE POWER TURBINE ROTOR (AVIM) (Continued)
4-51
(6)
Inspect inner half non-critical area (9) as
follows:
(a)
There shall be no nicks or dents
(10) in airfoil surface (11) longer
than 0.078 inch or deeper than
0.010 inch.
(b)
There shall be no nicks or dents
(12) in edges (13) longer than
0.125 inch or deeper than 0.031
inch.
(c)
There shall be no pitting deeper
than 0.010 inch.
(7)
Inspect outer half non-critical area (14)
as follows:
(a)
There shall be no nicks or dents
(15) in airfoil surface (16) longer
than 0.156 inch or deeper than
0.015 inch.
(b)
There shall be no nicks or dents
(17) in edges (18) longer than
0.219 inch or deeper than 0.078
inch.
(c)
There shall be no pitting deeper
than 0.010 inch.
(8)
There shall be no nicks deeper than
0.015 inch at tip labyrinth (19).
GO TO NEXT PAGE
4-307
