20-10 Cleaning (continued)
B. Cleaning Windshield and Windows
CAUTION
Do not use gasoline, other alcohols, benzene, carbon tetrachloride,
thinner, acetone, or window (glass) cleaning sprays.
1. Rinse away loose dirt and debris from windshield and windows with clean water.
2. Apply mild soap and clean warm water solution, or aircraft plastic cleaner, to windshield
and windows using a clean, soft cloth or sponge in a straight back and forth motion. Do
not rub harshly.
3. Remove oil and grease using a cloth wetted with isopropyl alcohol (rubbing alcohol) or
aliphatic naphtha.
4. After cleaning plastic surfaces, apply a thin coat of hard polishing wax. Rub lightly with
a soft cloth. Do not use a circular motion.
5. To remove scratches, rub windshield or windows with jeweler’s rouge then hand polish
with commercial plastic polish. Polish in figure eight motion.
C. Cleaning Seat Assemblies and Back Rests
1. Vacuum and brush, then wipe with damp cloth. Dry immediately.
2. Soiled upholstery, except leather, may be cleaned with a good upholstery cleaner suitable
for the material. Follow manufacturer’s instructions. Avoid soaking or harsh rubbing.
3. Leather should be cleaned with saddle soap or a mild hard soap and water.
D. Cleaning Carpet
Remove loose dirt with a whisk broom or vacuum. For soiled spots and stains, use
nonflammable dry cleaning liquid.
20-20 Lubrication
WARNING
Refer to appropriate Material Safety Data Sheet (MSDS) and
take necessary safety precautions when working in proximity to
hazardous materials.
All R66 bearings are sealed or self-lubricating and do not require periodic lubrication.
The engine oil tank, the main and tail rotor gearboxes, and the hydraulic reservoir require
servicing when indicated by sight gage level. Additionally, change engine, gearbox, or hydraulic
oil and clean respective sight gage when oil becomes so dirty its level cannot be determined.
Change hydraulic oil when notedly odorous.
When installing a new or overhauled main rotor gearbox, replace filter at first 100-hour
inspection after installation. Thereafter, replace filter at scheduled intervals per Section 5-20.
When installing a new or overhauled tail rotor gearbox, drain and flush after first 4 hours
of flight or first chip light, whichever occurs first. Thereafter, drain and flush gearbox at
scheduled intervals per Section 5-20.
Servicing procedures are located in Chapter 12.
Page 20.2 Chapter 20 Standard Practices R66 Maintenance Manual 25 OCT 2010
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