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Documentation anomalies

Issue number: AO-2013-046-SI-03
Who it affects: All owners and operators of Jabiru J230 & J430 aircraft
Issue owner: Jabiru Aircraft Pty Ltd
Operation affected: Aviation: General aviation
Background: Investigation Report AO-2013-046
Date: 19 August 2014

Safety issue description

The engine manufacturer’s documents with respect to the propeller mounting flange were technically inconsistent with regard to painting and torqueing procedures.

Proactive Action

Action organisation: Jabiru Aircraft Pty Ltd
Action number: AO-2013-046-NSA-016
Date: 19 August 2014
Action status: Closed

On the matter of avoiding paint on all the propeller-mounting flange’s faying surfaces – additional text has been included within the engine overhaul manual to emphasise and strengthen the requirement. Additionally, the latest revision of the process specification, covering surface preparation and painting, unambiguously specifies the manuals’ requirement for nil paint below the cap screw washers and the crank and propeller faying surfaces. On the subject of consistency for the torqueing procedure, this has been amended in both relevant manuals to solely specify the one-step, dynamic torqueing process.

   
Current issue status: Adequately addressed
Status justification:

The documentary changes should ensure the increased reliability of the propeller flange/crankshaft joint and the reduced likelihood of propeller loss due to joint fastener failure.

 
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Last update 19 August 2014