Figure 8-17. Compressor Blade Damage
Compressor Cleaning. Compressor cleaning
consists of internal washing of the compressor with a
cleaning compound which is intended for use on an
engine displaying definite evidence of performance
deterioration due to an accumulation of foreign material
deposits on the compressor blading. Refer to the
applicable maintenance manual for specific procedures.
Cold Section Maintenance. Maintenance to cold
section components consists of repairing and replacing
Compressor. Blade Inspection and Repair.
Compressor blades should be inspected for cracks,
nicks, scores, scratches, buckling, and burns, as shown
in figure 8-17. Minor damage can be repaired if the
damage can be removed without exceeding the
allowable limits established by the manufacturer.
Typical compressor limits are shown In figure 8-18.
Repair In accordance with the applicable maintenance
Hot Section Maintenance. The following are
repairs that can be made to the hot section of a turbine
Weld cracks in combustion chambers that do
not exceed repair limitations, using method and
procedure which keeps distortion to a minimum.
Replace any turbine wheel blade found to have
be out of repair limits. Check applicable
maintenance manual. Turbine blades will only
be changed in matched pairs.
Replace tailpipes when cracked, bent, or
Maintenance of the turbine and exhaust components
consists of repairing and replacing components as
outlined in the specific engine maintenance manual.
Ignition System Maintenance. Maintenance of
the ignition system consists primarily of cleaning,
explained by the following paragraphs.
(1) Wiring harness. Perform wiring harness
maintenance as explained by the following procedures: