12-20 Tail Rotor Gearbox
WARNING
Refer to appropriate Material Safety Data Sheet (MSDS) and
take necessary safety precautions when working in proximity
to hazardous materials.
12-21 Servicing
NOTE
Inspect tail rotor gearbox for leaks when “top off” is required.
NOTE
Verify aircraft is on level ground when evaluating gearbox oil
level.
A. Draining Fluid
1. Refer to Figure 12-3. Cut and discard ty-raps as required and disconnect chip detector
wiring from airframe harness at connectors.
2. Place a suitable drain container under gearbox to catch oil, then remove chip
detector.
B. Adding Fluid
1. Install chip detector per Section 12-22.
2. Refer to Figure 12-3. Remove filler-vent plug and fill gearbox with A257-22 lubricant
to center of sight glass.
3. Install plug and special torque per Section 20-33.
SEP 2012 R66 Maintenance Manual Chapter 12 Servicing Page 12.7
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