Jabiru Aircraft
Pty Ptd
Aircraft Service Manual
Jabiru J230-C
REVISION
0
Dated : Feb 2006
Issued By: RAS
Page: 23 of 171
L:\files\Technical_manuals\J230_J430\J230.J430_Work_files\J230-C_Tech_Rev_1.doc
Print Date: 14/01/2009 4:41:00 PM
8.
Install spark plugs – torque to 20 Nm (180 inch/lbs).
9.
Check fuel filter – replace if necessary.
10.
Check brake fluid level.
11.
If returning to service after indefinite storage, fill fuel tanks with correct grade of
fuel.
12.
Check fuel tank and fuel lines for moisture and sediment. Drain enough fuel to
eliminate any moisture and sediment.
13.
Check fuel tank breather is clear.
14.
Perform a thorough pre-flight inspection.
15.
Start and warm engine.
3.2
WEIGHING
3.2.1
SCALE LOCATIONS
For weighing three scales are used. Position one under each main wheel and one under
the nose wheel.
3.2.2
PROCEDURE
1. Position the aircraft on the scales on a level surface, preferably one that positions
can be marked on to, in the configuration to be weighed.
2. Chock the main wheels and make sure the brake is released. (If the chocks are of
significant weight their weight will need to be subtracted from the relevant scale
reading).
3. Level the aircraft using technique in 3.1.4 Levelling. If the nose needs to be raised
place packers under the nose wheel. If the nose needs to be lowered pack under
main wheels or deflate nose wheel. (remember to re-inflate to operating pressure
before use)
4. Using a square or a plumb bob mark the wheel centres on to the floor or scale
surface. Both sides of the nose wheel axle must be marked to eliminate any error if
it isn’t exactly straight. Also again using a plumb bob or a level mark the datum
(wing leading edge) onto the floor. Use points outboard of the main wheels on the
wing leading edge for the datum.
5. Take the wheel weights. When the wheel weights are being taken there must be nil
wind blowing on the aircraft. Due to the light nature of the J230 even a small
breeze can cause significant weight transfer and so C of G errors.
6. Using a string line or similar mark the datum across under the aircraft on the floor.
Measure the horizontal for/aft distance for each wheel (both sides of nose wheel) to
the datum. All distances aft of the datum are consider positive and all distances
forward of the datum are negative. See Figure 2: Weighing Diagram.