B2 Emergency Procedures Flashcards
Relight Procedure
The normal relighting ceiling is 13000 feet, but, relighting may be attempted throughout the altitude envelope.
Proceed as outlined below:
- Booster pumps -on
- Generator on
- Wait until Ng falls below 30% then carry out normal starting procedure.
In order to avoid any jerk on resynchronization, accelerate the engine progressively, when free turbine speed approaches rotor speed.
Gov. Failure - Low Side
Same symptoms as for complete engine failure but after a few seconds, Ng stabilizes at a low r.p.m. value (less than 70%).
Establish autorotation I.A.S. 65 kts, then advance the fuel flow control into the emergency sector. Ng and t4 should rise.
Control engine speed to 70 % Ng.
If necessary. increase collective pitch to bring rotor speed to 350 r.p.m.
Increase fuel flow until rotor speed is approximately 380 r.p.m.
Trim collective pitch and fuel flow control to hold level flight at this rotor speed.
Gov. Failure - High Side
Ng, t4, NR and torque increase. Do not reduce collective pitch.
Reduce fuel flow until rotor speed corresponds to a position of the indicator pointer in the centre of the green area.
Continue flight with the governor out of action. Any reduction of collective pitch will cause an increase in rotor speed which must be counteracted by adjusting the fuel flow control position.
In both cases mentioned above, the landing approach should be made along a low gradient path, at 65 knots (120 km/hr) I. A. S., holding the rotor speed at the upper limit of the green area (394 r.p.m.) using the fuel flow control. In final approach, reduce forward speed without touching the fuel flow control.
The rotor speed will drop when the on touchdown.
After touchdown, reduce fuel flow control before decreasing the collective pitch.
Surging
Surging is evidenced by hunting and jerks in the yaw axis.
Change the collective pitch setting.
If surging persists while fuel pressure and engine oil pressure are correct, reduce fuel flow slightly to leave the governed range.
If surging still persists, land as soon as possible and shut down the engine if there is a tendency to divergence.
Fire During Start
Fire during Engine Start
- Close the fuel shut-off cock and apply the rotor brake if necessary.
- Switch off the booster pumps.
- Crank the engine for 10 seconds then switch off the battery.
- Use the nearby extinguishers to fight the fire.
Fire During Flight
(FIRElight on)
- Enter autorotation.
- Close the fuel shut-off cock to shut down the engine.
- Switch off the booster pumps, generator and alternator (if installed).
- Switch off the electrical master ALL OFF switch if there is a smell of burning.
Smoke in Cabin
If Source of Smoke is identified -- -Shut off the corresponding system. -If necessary, use the fire extinguisher-. -Air the cabin by opening: The front ventilator The ventilation ports The bad weather windows.
If source of Smoke is not identified –
- Shut off the heating -demisting If the smoke does not clear:
- Switch off the electrical master
- When the smell of smoke has cleared, set all switches to OFF, including the generator and alternator (if installed), close the cabin ventilators.
- Reset the *ALL OFF- electrical master switch to normal position.
- Switch on the generator, check voltage and current.
- If everything is normal, switch on the circuits one by one until the malfunction
NOTE, If the electrical power supply system is faulty, carry out the procedure, as detailed in Section 3.3.
Tail Rotor Failure
Tail Rotor Drive Failure –
Loss of the tail rotor in power-on flight results in a yaw movement to the left; the extent of such rotation will depend on the power and speed configuration at the time the failure occurs.
Failure of the Tail Rotor in Hover or at Low Speed –
- I.G.E. : bring the aircraft to the ground by reducing collective pitch before the yaw rate is too high.
- O.G.E. : reduce collective pitch moderately, to reduce yaw torque, and simultaneously start to pick up speed.
CAUTION: LANDING IS MADE EASIER BY A WIND COMING FROM THE RIGHT. IF THE AIRSPEED is LOWER THAN 20 kt (36 km/h), GO-AROUND IS iMPOSSIBLE DUE TO THE LOSS OF EFFICIENCY OF THE FIN.
Failure in Forward Flight
- In forward flight reduce the power as much as possible and maintain forward speed (weathercock effect), select a suitable landing area for a steep approach at a power enabling a reasonably coordinated flight.
- On final approach, shut down the engine and make an autorotative landing at the lowest possible speed.
Tail Rotor Control Failure
- Set I.A.S. 70 knots, in level flight.
- Press the hyd. accumulator test push-button (this cuts off hydraulic power to the yaw servo control and depressurizes the load-compensating servo accumulator). After 5 seconds, reset the test button to the normal position.
Make a shallow approach to a clear landing area with a slight side slip to the left. Perform a run-on landing; the side slip will be reduced progressively as power is applied.
No Fuel Pressure
Confirmed by FUEL P. warning light.
If not confirmed, gauge is faulty. Flight may be continued.
Low Fuel Pressure
Confirmed by F. FILT warning light.
If not confirmed, gauge is faulty. Flight may be continued.
Low Engine Oil Pressure
Test Warning Caution Advisory Panel and check ENG. P. light illuminates.
Light does not illuminate when tested:
If torquemeter reading is much too low, shut down engine and make an autorotation landing.
If torquemeter reading is correct, land as soon as possible.
Light illuminates when tested:
If torquemeter reading is much too low, land as soon as possible.
If torquemeter is correct as soon as practicable.
Oil Temp High
At Low Speed or in Hover
- Land if possible.
- Stop the engine.
- Check that the cooler fan operates.
If landing impossible:
-Increase speed and reduce power
-Fly at approximately 80 knots (148 km/hr)
The temperature should fall rapidly.
If this result is not obtained, land as soon as possible.
In Cruising Flight
- Reduce power, proceed as above.
NG Difference Indicator Failure
Do not exceed authorized torque.
Below 15C, limit t4 below 730C
Above 15C, limit t4 below 750C
t4 Indicator Failure
Comply with NG limitations.
Do not attempt to start the engine.
NR/NF Below Green Arc
Excessive power demand. Reduce collective. Governor failure.
