Jabiru 3300 - Flywheel Screw Basic Inspection; Flywheel Screw Detailed Inspection; Use of Safety Wire

Engine Maintenance Manual
Jabiru Aircraft Pty Ltd
JEM0002-5
Jabiru 2200 & 3300 Aircraft Engines
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Dated : 2nd June 2015
Issued By: AS
Page: 74 of 103
L:\files\Manuals_For_Products\Engine_Manuals\Engine Maintenance Manual 22 & 33\JEM0002-5.docx
9.22 Flywheel Screw Basic Inspection
Required Tools:
Torch
Parts and Material:
Replacement Flywheel Screws (if required)
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
 Remove the alternator stator to allow access to the flywheel. Where equipped the vacuum
pump must also be removed.
 Visually inspect the flywheel screws, checking for sings of deformation and damage. Feel with
fingers to check that no screws rotate or are loose
 If there is any movement then ALL flywheel screws must be removed and replaced with new,
approved, screws. The procedure for replacing these screws must be followed precisely.
Details are provided in the Jabiru Engine Overhaul Manual.
9.23 Flywheel Screw Detailed Inspection
Required Tools:
Screwdrivers
Spanners / Socket Wrench
Torque wrench
Parts and Material:
Replacement Flywheel Screws (if required)
Type of Maintenance:
Line Maintenance
Level of Certification:
L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L2 or LAME (A&P or LSA Repairman / Maintenance)
 Remove the alternator stator to allow access to the flywheel. Where equipped the vacuum
pump must also be removed.
 Set a torque wrench to one of the following settings depending on the engine configuration
o 15 ft.lb for engines equipped with 1/4" screws
o 24 ft.lb for engines equipped with 5/16” screws
o 30 ft.lb for engines equipped with 3/8” screws
 Check each screw using the torque wrench to see if any are loose or broken.
 If any rotate at this tension then ALL flywheel screws must be removed and replaced with new,
approved, screws. The procedure for replacing these screws must be followed precisely.
Details are provided in the Jabiru Engine Overhaul Manual.
 Flywheel Bolts must be replaced every 500 hours regardless of condition. (Note - this only
applies for approved propeller installations, see section 8.14 for non-approved propellers)
9.24 Use of Safety Wire
Required Tools:
Lock wire pliers
Parts and Material:
Stainless Steel Safety wire
Type of Maintenance:
Line Maintenance
Level of Certification:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
Return to Service:
L1, L2 or LAME (A&P or LSA Repairman / Maintenance)
 Only stainless steel safety wire is used on the Jabiru Aircraft Engine.
 There are two methods of safety wiring; the double-twist method that is most commonly used,
and the single-wire method used on screws, bolts, and/or nuts in a closely-spaced or closed-
geometrical pattern such as a triangle, square, rectangle, or circle. The single-wire method may
also be used on parts in electrical systems and in places that are difficult to reach. Single-wire
safetying is not used on the Jabiru Aircraft Engine.