TM 55-2840-254-23
2-35 INSTALL COMPRESSOR ROTOR BLADES (Continued)
2-35
2. Install second through seventh stage compressor
blades as follows:
a. Weigh serviceable balde and damaged blade
that is to be replaced using balance scale.
NOTE
Weight of blades shall be within 0.1 gram
of each other.
NOTE
Damaged blade may have excessive miss-
ing material. If this occurs, remove op-
posite blade 180 degrees away. Weigh
and select serviceable blade having same
weight within 0.1 gram difference. If
correct blade weight iS not available,
select two serviceable blades of equal
weight. InstalI blades 180 degrees apart.
NOTE
If more than 10 single blades are re-
placed, each additional serviceable blade
must exactly match weight of blade re-
moved. It may not be possible to match
weights of old and serviceable blades. If
this happens, additional blades must be
replaced in matched sets.
NOTE
Number of blades and stages in which
they were replaced must be entered in
engine record. Maximum of 50 blades
may be replaced on compressor rotor
between overhaul cycles.
NOTE
This procedure shows third stage com-
presser blades. It is also applicable to
second, fourth, fifth, sixth and seventh
stage compressor blades.
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