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9 Cards in this Set

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Engine Overspeed
Engine overspeed will be indicated by a right yaw, rapid increase in both rotor and engine RPM, and an increase in engine and rotor and engine noise. If engine overspeed is experienced:

1. Collective- increase to load the rotor and sustain engine RPM below the maximum operating limit.

2. Throttle- Adjust until normal operating RPM is attained

3. Land As Soon As Possible- Perform a power-on approach and landing by controlling the RPM manually with the throttle.

If RPM cannot be controlled by throttle adjustment:

4. Autorotate when over a safe landing area.

5. Emergency Shutdown- Accomplish during descent if time permits.
Engine Underspeed
If an engine underspeed occurs, the collective must be adjusted downward to maintain rotor PM within limits. If powered flight with the rotor in the green can be accomplished:

Land as soon as possible in an area that will permit a run-on landing.

An engine underspeed below 90% results in rotor RPM decay below minimum safe limits. Should this occur:


Emergency shutdown- Accomplish during the descent if time permits.
Engine Surges
a. Gov INCR switch- INCR for maximum RPM
b. Throttle- adjust to 97% N2
c.Land as Soon as possible

If engine surges cannot be controlled in steps a and b, proceed as follows:

a. Autorotate- When over a safe landing area

b. Emer shutdown- Accomplish during descent if time permits.
Fuel boost pump failure
a. descend below 6000 feet pressure altitude

b. Land as soon as practicable
Low inlet pressure
1.Engine alternate air switch- Open
2.If caution light remains on, land as soon as possible
3. If caution light goes out, Land as soon as practicable. Related engine parameters should be monitored frequently until landing.
Engine Icing
1. Engine anti-icing switch- ON(if conditions warrant)
2. Turb out temp- maintain within limits
Main drive shaft failure
a. Autorotate- Establish a power on autorotation
b. Emer shutdown- Accomplish after landing.
Clutch fails to disengage
a. Throttle- open.
b. Land as soon as possible.
Power Turbine (N2) limits
R- 97% minimum operation

G- 97 to 100% continuous operation

R- 100 maximum

N2 75 to 88%, 60 seconds max (time not cumulative)