Aircraft Service Manual
Jabiru Aircraft
Pty Ltd
JTM001-1
J120, J160, J170, J200/J400, J230/J430, J250/J450 Variants
REVISION
1
Dated: Nov 2011
Issued By: SW
Page: 169 of 233
13.10.3
EXHAUST INSPECTION
As all exhaust systems are subject to burning, cracking and general deterioration from alternate
thermal stress and vibration, inspection is very important and should be carried out every 100
hours of operation.
In addition, an inspection of the exhaust system must be undertaken anytime exhaust fumes are
noticed in the cabin.
1.
Remove engine cowlings.
2.
Inspect complete system, starting at the connection to the head; securing bolts and moving
outwards. Especially check areas adjacent to welds. Look for exhaust gas deposits in
surrounding areas, indicating that exhaust gas is escaping through a hole or crack.
For a more thorough inspection, the following procedure is recommended.
1.
Remove manifolds and/or muffler.
2.
Use rubber expansion plugs to seal openings.
3.
Using a manometer or gauge, apply approximately 1-1/2 psi (3 inches of mercury) air pressure
while the manifold and/or muffler are submerged in water. All leaks will appear as bubbles and
can be readily detected.
4.
It is recommended that any exhaust system component found to be defective is replaced with a
new part before the next flight.
13.10.4
EXHAUST INSTALLATION
For installation reverse the removal procedure given above.
If the exhaust manifolds / extractors have been loosened or removed, then during installation
care must be taken to position the muffler correctly. Carry out a test fit of the muffler to the
system, then stand back and check that it is positioned at the engine centreline and is true and
straight. If necessary adjust the manifold or extractors. Before final fit ensure that extractors /
manifolds are aligned well with the exhaust ports. Poor alignment will result in exhaust port
damage (particularly for 2-bolt flanges). Tighten all extractor screws & assemble.
Figure 141
– 2200 Exhaust System