TM 55-2840-254-23
4-35 INSPECT FOURTH STAGE POWER TURBINE ROTOR (AVIM) (Continued)
4-35
(7)
Inspect inner half non-critical area (8) as
follows:
(a)
There shall be no more than four
nicks (9) or dents (10) in surface
(11) longer than 0.094 inch or
deeper than 0.015 inch.
(b)
There shall be no more than two
nicks (12) or dents (13) on edges
(14) longer than 0.125 inch or
deeper than 0.031 inch.
(8)
Inspect outer half non-critical area (15)
as follows:
(a)
There shall be no more than four
nicks (16) or dents (17) in surface
(18) longer than 0.203 inch or
deeper than 0.020 inch.
(b)
There shall be no more than two
nicks (19) or dents (20) on edges
(21) longer than 0.219 inch or
deeper than 0.078 inch.
(9)
There shall be no nicks deeper than 0.015
inch at tip labyrinth (22).
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