MAINTENANCE MANUAL
SAVANNAH S
Doc. No.:
MM-SVNH-EN
Revision:
07
Rev. Date:
07/11/2022
Proj. Ref.:
SVNH S
A/C:
Savannah S
Applies to Generic Serial Number:
yy-mm-54-xxxx
Page:
108/132
DOC
FMM00
7.7. Engine oil level verification
CAUTION
The complete instruction for this verification is described in the approved
manufacturer manual of the engine installed. The Maintenance Manual
can be downloaded in the technical documentation section of the Rotax
website www.flyrotax.com . The following checklist is just a brief resume
N°
Action
01.01
Verify magnetos switch OFF
01.02
Open the oil tank cup
01.03
Remove the oil dipstick and clean it, paying attention to oil drops outside of the engine
compartment
01.04
Rotate the propeller (slowly during the compression) until the oil tank gurgles
01.05
Insert the oil dipstick in the fuel tank
01.06
Remove the oil dipstick and monitor the level
01.06
Verify quality of the oil: clean, not burnt, no impurity
01.08
Insert the dipstick and close the oil cup
Table 38: Engine oil level
7.8. Oil change
According to the Rotax engine manufacturer approved Maintenance Manual for 912ULS installed
model, the following procedure must be followed to drain and change the engine lubricating oil:
-
Run the engine and warm up to 40 to 50 [°C] of oil temperature;
-
Shut off the engine and check magnetos and master are off;
-
Open the engine cowling and let cool down the engine just a couple of minutes;
-
If not necessary a complete drainage, jump this step. Differently perform the following
actions: disconnect the return line (IN) from the oil tank, remove one spark plug from each
cylinder, pressurize at 1 [bar] the vent line of the tank, rotate the engine by hand up to the oil
is completely drained out from the return line. If necessary, disconnect also the oil radiator
before this procedure and clean it. If necessary clean/flush or replace the oil lines and
radiator. When completed, tight the return line on the oil tank at 25 [Nm] and install the spark
plugs at 20 [Nm];
-
Open the oil tank cup;
-
Crank the engine by hand to transfer the oil from crankcase to oil tank, let the oil tank gurgling
many times;
-
Remove the lower drain screw and its safety wire from the bottom of oil tank;
-
Drain the oil (or the remaining oil) from tank and dispose of as per environmental protection;
-
If required, clean the oil tank with the dedicated procedure of the engine manufacturer;
-
Install on the tank the lower drain screw with a new sealing washer and tight at 25 [Nm] of
torque. Perform the safety wiring of the screw;