TM 55-2840-254-23
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1-117 STANDARD MAINTENANCE PRACTICES (Continued)
(7) When a cotter pin is required, cotter pin holes will be aligned within allowable torque range.
C. When a nut is tightened or loosened on a bolt, the bolt head will be held with a wrench.
D. Guide lines will be used when any item is hoisted overhead.
E. Manufactured item specifics are listed in Appendix E.
F. Before a component or the parts of a component are inspected, they are to be cleaned as required.
G. Nicks, burrs, and scratches are acceptable unless specific criteria is called out in inspection task steps.
Sharp projections shall be blend repaired, within specific criteria.
H. Blend-repair shall be accomplished using small files and Carborundum stones (E10), Use crocus cloth
(E15) for final polishing; do not use power tools. Blend all repairs and finish smoothly. Lines, scratches,
or sharp edges, which are sharp bottomed, are not permitted. The finish stroke of all compressor and
turbine blade repair work shall be parallel to leading and trailing edges of blade. When blade is repaired
on leading or trailing edges, blend edges with smooth radius as part of repair.
I. Components and installation area will be inspected for condition before installation.
J. Prior to installation, paint will be touched up as required.
K. Following maintenance, work area will be inspected for foreign objects.
L. Test setups are shown as schematics. Specific attaching hardware is not listed to allow you flexibility
in using equivalent equipment.
M. General maintenance procedures such as magnetic particle inspection and threaded insert replacement
are not included in maintenance instructions. A reference is made to applicable general maintenance
manual for procedures.
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