TM 55-2840-231-23
2-11. Compressor Case - Repair - Continued
COMPRESSOR/-
Continued
2. Corrosion Removal
3. Vane Surface Blend
Repair
Abrasive Paper (item 27, Appendix D)
Remove corrosion deposits
from the stator vanes by
polishing with abrasive
paper. Polish vanes in a
longitudinal direction
only. Blending to remove
corrosion pitting is not
required. Pitting must not
exceed the limits of
paragraph 2-10.2.
Blend out nicks, dents,
and scratches on the
airfoil surface. Final
polish to remove blending
marks. Blended areas
must be within the limits
shown below. No vane
OUTER 1/2 OF VANE
AIRFOIL SURFACE NICKS AND DENTS
MAX DEPTH OF 1/4 AIRFOIL THICKNESS AFTER
BLEND. MAINTAIN 3/64 IN. (1.2 MM) MIN BOTTOM
RADIUS ON ALL BLENDING. MAX OF TWO
BLENDS PER VANE AND BLENDS MUST NOT
BE IN LINE PARALLEL WITH CASE CENTER
straightening allowed.
INNER 1/2 OF VANE
MAX DEPTH OF 1/2 AIRFOIL THICKNESS AFTER -
BLENDING. MAINTAIN 3/64 IN. (1.2 MM) MIN
BOTTOM RADIUS ON ALL BLENDING. BLENDS
MUST NOT BE IN LINE PARALLEL WITH CASE
CENTER LINE.
LINE.
2-38
Change 11
