Form No. ASI/MD-81
Revision 3 – July 2020
Page 3 of 4
NO.
DESCRIPTION
MECH. ENG.
5 Measure the quantity of the fuel in the container.
Quantity: _______________
6 Make sure the difference between the fuel used totalizer indication and the quantity of
fuel in the container is not more than ± 1 liter (± 0.26 US gals).
7 Calculate the fuel rate for 1 hour as follows:
−
Quantity of fuel in container after 5 minutes x 12 = Flow rate/hour.
8
Compare the calculated fuel flow with the actual fuel flow recorded at step (2):
−
The difference between the calculated fuel flow and the actual fuel flow must be
the same ± 12,5 liter/hour (± 3,3 gals/hour)
9
If the difference between the actual and calculated fuel flow is out of limits, replace
the indicators, signal conditioner or fuel flow transmitter.
NOTE: IT IS RECOMMENDED THAT THE FUEL FLOW TRANSMITTER IS
REPLACED FIRST.
10 Empty the container.
D. High Fuel Flow Indication Check Using the Auxiliary Fuel Pump System (Ref. Fig. 1)
1 Set the AUX F PUMP switch to ON.
2
Move the fuel-system valve-lever towards the CLOSED position to get an indicated
fuel flow of between 189 and 285 liters/hour (50 and 75 US gals/hour). Record the
indicated fuel flow.
Fuel flow:
NOTE: TO MAKE THE TEST EASIER, YOU CAN MAKE AN ORIFICE TO GET THE
CORRECT FUEL FLOW. USE A METAL BLANK DRILLED WITH A 2,4
mm (3,32 in) HOLE INSTALLED IN THE END OF THE DISCONNECTED
OUTLET HOSE (2). THIS WILL GIVE THE REQUIRED FUEL FLOW WITH
THE FUEL-SYSTEM VALVE-LEVER FULLY “OPEN”.
3
When the fuel flow is correct and constant, get a second person and do these steps at
the same time.
−
Reset the fuel totalizer.
−
Record the quantity of fuel in the container.
−
Start the stopwatch.
4 After 5 minutes, set the fuel-system valve-lever to CLOSED and the AUX F PUMP
switch to OFF.
5 Record the fuel used from the fuel used totalizer.
Fuel flow:
6
Measure the quantity of the fuel in the container and subtract the quantity recorded in
Step (3).
Quantity:
7 Make sure the difference between the fuel used totalizer indication and the quantity of
fuel in the container is not more than ± 1 liter (±0,26 US gals).
8 Calculate and record the flow rate for 1 hour as follows:
−
Quantity of fuel measured at step (6) x 12 = Fuel flow rate /hour.
9 Make sure that the flow rate recorded at step (8) is not more than ± 12,5 liters/hour
(±3.3 US gals/hour) different to the fuel flow indication recorded in Step (2).
10
If the difference between the actual and calculated fuel flow is out of limits, replace
the indicators, signal conditioner or fuel flow transmitter.
NOTE: IT IS RECOMMENDED THAT THE FUEL FLOW TRANSMITTER IS
REPLACED FIRST.
E. Close Up (Ref. Fig. 1)
1 If necessary, remove the orifice from the outlet hose (2).
Summary of Contents for PILATUS PORTER PC6
Page 2: ...MAINTENANCE PROGRAM PILATUS PC 6 DOCUMENT NUMBER SAP 27 REISSUE 2 REVISION 1 JULY 2020...
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