2-35 INSTALL COMPRESSOR ROTOR BLADES (Continued)
1. Install first stage blade (1) into disc
a. Weigh serviceable blade and damaged blade
that is to be replaced using balance scale.
Weight of blades shall be within 0.1 gram
of each other.
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. Install blades 180 degrees apart.
If more than 10 single blades are replaced,
each additional serviceable blade must
exactly match weight of blade removed.
It may not be possible to match weights
of old and serviceable blades. If this
happens, additional blades must be re-
placed in matched sets.
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.
b. Select serviceable blade (1) that is within 0.1
gram in weight of blade to be replaced. Re-
fer step a. above for weighing procedure.
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