Engine Overhaul Manual
Jabiru Aircraft
Pty Ltd
Jabiru 2200 & 3300 Aircraft Engines
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ISSUE
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Dated : 28/10/2014
Issued By: AS
Page: 62 of 201
L:\files\Manuals_For_Products\Engine_Manuals\Overhaul_Manual\JEM0001-7_Overhaul_Manual_DRAFT_(29_10_14).docx
5.9.2.2
Mandatory Discard
In any case where a rod has been subjected to severe loads
– for example if the piston struck a valve –
the rod must be discarded.
5.9.2.3
Cleaning
Clean out the threads in the end cap with a 5/16” UNF tap.
Extract the locating pins from the rods and wash out all debris from the holes.
It may be necessary to lightly polish the inner bore of the little end of the rod. A build up of burnt oil or
varnish here can make fitting the gudgeon pin difficult. This can be done by hand using fine emery
paper or using a fine-grade flapper wheel on a die-grinder or Dremel. Only oil deposits must be
removed
– not metal.
Wash the connecting rods thoroughly with kerosene and blow dry.
Coat with engine oil or other corrosion preventative.
5.9.2.4
Inspection
Inspect each rod visually for straightness and marking. Note that each rod/end cap pair is marked with a
unique ID number and must only be refitted as a matched pair.
The connecting rods must now be inspected for structural integrity with MPI (Magnetic Particle
Inspection). Note that for MPI the rod must be as clean as possible
– usually all burnt oil deposits must
be removed.
The rods must be subjected to a thorough visual inspection for straightness / trueness. As noted
above, any rod which has been subjected to unusual loads must be discarded but otherwise a careful
visual inspection of these parts is sufficient. Uneven bearing wear or abnormal little end wear are
indicators of an untrue rod.