JS-3 Jet Sustainer
Flight Manual Supplement
JS03-AFM-00-002
Issue: 00.32JS
Rev. 00.32JS
Rev. Date: 08.02.2019
Page 4
–13
4.8 Engine Protection modes
Safe mode operation
4.8.1
The system has been designed to enter a Safe mode when RPM signal
is lost temporarily. If safe mode is entered, the fuel flow is reduced to
ensure that the engine will not over-speed. The RPM is monitored
consistently - if reliable RPM signals are restored, the system returns to
normal operation.
The pilot can only increase the power after normal operation has been
restored.
Over temperature protection
4.8.2
If the measured EGT exceeds the normal operation EGT limit for a
duration exceeding a pre-set duration, the throttle will be automatically
reduced. The pilot may increase the power setting, but the system will
not allow an RPM setting with a resulting EGT exceeding the maximum
allowable EGT.
Automatic Shut down
4.8.3
In case the maximum allowable engine temperature is exceeded, the
engine will be shut down instantly. The normal cooling cycle will follow
an automatic shutdown.