TOMARK, s.r.o.
Airplane Maintenance Manual
Chapter 05 Inspection and Maintenance
Page 56
Issue: 04.APR 2016
The Viper SD-4 RTC features a number of dry bearings which in
essence do not need any lubrication, if those bearings are
questionable in their status just clean and inspect. In case the bearing
shows signs of wear they need to be replaced.
The wheel bearings are life time lubricated - in case of questionable
status they need to be replaced.
05-20-03 Drain Holes
Drain holes are located in fuselage and empennage bottom and one
drain hole is located at the bottom of additional exhaust muffler.
Drain holes must be inspected regular for obstruction.
Figure 2
Drain holes areas
Issue: 25.APR 2017