TOMARK, s.r.o.
Airplane Maintenance Manual
Chapter 05 Inspection and Maintenance
Page 62
Issue: 04.APR 2016
05-21-26
System
General
Verify that the database is current. Verify that software settings are
applicable to the Viper SD-4 RTC and unchanged versus the
information contained in the flight manual.
Verify EMS page on RHS display is always on minimum 50% screen
layout.
Skyview Artificial Horizon
Check the logical functioning of the artificial horizon. It should be
possible to see the effects from both roll and pitch on the instrument
instantaneous and reflecting actual pitch and roll. The aircraft
indicator symbol should be adjustable both up and down.
Turn and Bank Indication
Check the logical functioning of the turn and bank indicator. It should
be possible to see the effects from both left and right bank on the
instrument. Furthermore check the functioning of the slip indicator.
Slipping the aircraft both to the left and to the right should result in a
logical indication. Check accuracy of the instrument by timing a full
360 turn.
GPS
Check the functionality of the GPS. See whether the reception of
satellite signals is sufficient. Furthermore check the navigation facility
by trying to navigate for a short period to an airfield or beacon in the
neighborhood which is available in the data base.
OAT Indicator
The OAT indicator shows the outside air temperature measured at the
interface between VST and HST. The temperature indication can be
correlated to the temperature ATC has available on the airfield at the
moment of take-off. The functionality can further be checked by the
fact that usually the temperature decreases with increasing altitude
(note that OAT values have a noticeable time delay – remain on level
