CHAPTER 20
STANDARD PRACTICES
20-10 Cleaning
NOTE
Remove turbine exhaust stains from engine cowling, tailcone,
empennage, and tail rotor blades after every flight to prevent
permanent discoloration.
CAUTION
Wash helicopter exterior surfaces, windshields, and windows
with mild soap and water. Harsh abrasives, alkaline soaps, or
detergents can scratch painted or plastic surfaces, or cause
corrosion of metal. Protect areas where cleaning solution could
cause damage.
CAUTION
Never use high-pressure spray to clean helicopter. Never blow
compressed air into main or tail rotor blade tip drain holes, pitot
tube, or static ports.
WARNING
Refer to appropriate Material Safety Data Sheet (MSDS) and
take necessary safety precautions when working in proximity to
hazardous materials.
A. Cleaning Exterior Surfaces
1. Rinse away loose dirt and debris from exterior surface with clean water.
2. Apply mild soap and clean warm water solution to exterior surface using a clean,
soft cloth, sponge, or soft bristle brush. Use caution near antennas and sensitive
equipment.
3. Remove oil and grease using a cloth wetted with aliphatic naphtha.
4. Rinse all surfaces thoroughly.
5. If desired, polish painted surfaces with a good quality automotive wax using soft cleaning
cloths, or a chamois cloth, free of abrasive debris.
25 OCT 2010 R66 Maintenance Manual Chapter 20 Standard Practices Page 20.1
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