Engine Flameout; Failure Of Automatic Fuel Scheduling - THRUSH S2R-H80 Flight Manual

3.10.

ENGINE FLAMEOUT

The indications of any engine flameout will be a drop in the ITT (inter-turbine temperature),
torque pressure and RPM. The flameout may result from the engine running out of fuel
or possibly by unstable engine operation. Once the fuel supply has been restored to the
engine or the cause of the unstable operation eliminated, the engine may be restarted in
the manner described in Section 3.12: "Normal Air Starts".
a. Auto start enable switch
b. Engine start switch
c. If engine restarts:
d. If engine fails to start -
3.11.

FAILURE OF AUTOMATIC FUEL SCHEDULING

Please refer to Section 6 Emergency Circuit of Fuel Control Unit and its application
(Engine manufacturer Operation Manual GE H80-100 – 0983302).
Normally the fuel scheduling is automatic, the engine power lever is positioned by the pilot
and the fuel control schedules the fuel in a manner that allows smooth increases and
decreases of power while not exceeding any engine limitations during acceleration or
deceleration. In the event the automatic fuel scheduling fails, the engine will experience a
"low side" failure, sometimes called a "roll back". The engine goes to minimum fuel flow,
which is slightly below normal Ng idle speed. Fortunately the GE H-80 is equipped with an
emergency governor which will allow the pilot to regain full control of the engine and safely
return. While in Emergency Governor, all automatic fuel scheduling is lost and power is
controlled by the fuel condition lever. Too rapid of movement of the fuel condition lever
while in Emergency Governor can cause ITT exceedences, Ng speed exceedences, and
compressor stalls. It's imperative that any power changes while in Emergency Governor
be made smoothly and slowly allowing the engine to accelerate normally. Full power is
available while in Emergency Governor. In the event automatic fuel scheduling is lost and
the engine goes to minimum fuel flow.
a. Raise the switch guard and place Emergency Governor Switch ON.
b. Smoothly advance the ENGINE FUEL CONDITION LEVER until power is
restored and a climb is established.
c. LAND AS SOON AS PRACTICABLE.
d. If power is not restored, LAND AS SOON AS POSSIBLE.
AFM H8001 SINGLE & DUAL COCKPIT Revision A
FAA APPROVAL DATE: 8/05/2014
S2R-H80 Single & Dual Cockpit
LAND AS SOON AS
PRACTICABLE
(Reference 3.14: Forced Landing)
AIRPLANE FLIGHT MANUAL
ON
START
LAND AS SOON AS POSSIBLE
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