Document Title Document No. Revision
Date Section
Supplement S3 to the AMM CTLS-LSA –
CTLS-LSA with ROTAX 912iS
AF 0480 0011 00 05-Aug-12 12-10-3
Approval Ref.: Approved on the Basis of Manufacturer Self Declaration
12-10.2.3 Fuel Flow Rate Check
12-10.2.3.1 Type of Maintenance
Line
12-10.2.3.2 Minimum Level of Certification
Repairman, Light Sport Aircraft-Maintenance (RLSA-M) or higher.
12-10.2.3.3 Procedure
A. Recommended Special Tools and Parts
Item Quantity Unit
Transparent container 1 pcs
Measuring jug, fuel and ethanol resistant, min. 4 l (1 US.gal).
Alternatively, transparent container as above with calibrated
volume markings
1 pcs
Marking pen that will write on the transparent container 1 pcs
B. Fuel Flow Rate Check
Check the fuel flow per minute of each tank through the gascolator exactly and note and
compare with the previous fuel flow rate. If there is a drop more than 5%, then check full
system (bows in fuel lines) and if still a difference, check the fuel filters in the wings.
Step Action Reference
1 Set the plane on the prepared platform.
2 Set a fuselage on horizon level, using supports under the main wheels.
3
Fill fuel tank in the left wing with minimum 5 liters of fuel. Open the gascolator
drain valve. Fuel will drain by gravity.
4
When fuel does not drain automatically, close the drain valve and then push the
tail of the aircraft down and hold it in this position for a minute. This will start the
fuel flow. Re-open the drain valve again.
6
Let fuel flow for 3 minutes. Apply markings of the fuel level on the container after
each minute.
7 Close drain valve after exactly 3 minutes
8
Use measure jug to measure the drained volume per minute.
Required minimum flow rate is 40 liter (10.6 US.gal) per hour. This is equal to
667 ml (0.176 US.gal/min) per minute
9 Drain all fuel from the left wings tank. 12-10.2.1
10 Repeat procedure for the right wing tank.
C. Troubleshooting.
If fuel flow rate on either or both sides is less than 40 l / hour, it is necessary to check:
Step Action Reference
1 Check fuel hoses for absence of kinks. Fix, when found.
2 Check gascolator filter mesh for contamination and clean. 28-00.3.1
3 Repeat the fuel flow test.
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