Piper COMANCHE PA-24-180 Service Manual page 283

Figure 3. Internal Cable Wear
D. Corrosion
Carefully examine any cable for corrosion that has a broken wire in a section not in contact with
wear producing airframe components such as pulleys, fairleads, etc. It may be necessary to remove
and bend the cable to properly inspect it for internal strand corrosion as this condition is usually not
evident on the outer surface of the cable. Replace cable segments if internal strand rust or corrosion
is found.
Areas especially conducive to cable corrosion are battery compartments, lavatories, wheel wells,
etc., where concentrations of corrosive fumes, vapors, and liquids can accumulate.
-Note-
Check all exposed sections of cable for corrosion after a cleaning and/or metal-
brightening operation has been accomplished in that area.
E. Cable Maintenance
Frequent inspections and preservation measures such as rust prevention treatments for bare cable
areas will help to extend cable service life. Where cables pass through fairleads, pressure seals, or
over pulleys, remove accumulated heavy coatings of corrosion prevention compound. Provide
corrosion protection for these cable sections by lubricating with a light coat of graphite grease or
general purpose, low-temperature oil.
- CAUTION -
AVOID USE OF VAPOR DEGREASING, STEAM CLEANING,
METHYLETHYLKETONE (MEK) OR OTHER SOLVENTS TO REMOVE
CORROSION-PREVENTATIVE COMPOUNDS, AS THESE METHODS
WILL ALSO REMOVE CABLE INTERNAL LUBRICANT.
Added: 8/15/98 APPENDIX NO. 1
PIPER COMANCHE SERVICE MANUAL
IL19