Aviation safety investigations & reports

Technical assistance to Recreational Aviation Australia in the examination of a rudder control cable from an Aeroprakt A22LS Foxbat aircraft

Investigation number:
AE-2018-018
Status: Completed
Investigation completed
Phase: Final report: Dissemination Read more information on this investigation phase

Final Report

On 1 November 2017, an Aeroprakt A22LS Foxbat was involved in a landing accident that resulted in the aircraft coming to rest inverted adjacent to the airstrip. Examination of the aircraft following the occurrence, identified that the right rudder control cable had failed in flight. Significant damage to the left rudder control cable was also identified at a similar location to where the right cable had failed.

Recreational Aviation Australia requested that the ATSB perform a detailed technical examination of the aircraft’s rudder control cables and associated rigging. The scope of this examination was limited to the identification of factors that contributed to the damage and subsequent failure of the cable. To facilitate this work, the ATSB initiated an external investigation under the Transport Safety Investigation Act 2003.

The ATSB analysis found that the right cable failed as a result of fatigue failure associated with significant wear of the individual wires (see Figure 1). Although the left hand cable did not fail, it was found to be unserviceable based on the standards set in the aircraft maintenance manual, due to fatigue fracturing of the wire strands. Both cables were found to be within material specifications.

Figure 1: Wear and associated fatigue fracture of wires on the right rudder control cable

Figure 1: Wear and associated fatigue fracture of wires on the right rudder control cable. Source: ATSB
Source: ATSB

 

Any further enquiries in relation to the accident investigation should be directed to Recreational Aviation Australia.

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The information contained in this update is released in accordance with section 25 of the Transport Safety Investigation Act 2003.

General details
Date: 01 November 2017   Investigation status: Completed  
Time: 0930 AEDT   Investigation level: Defined - click for an explanation of investigation levels  
Location   (show map): Mt Jack Station   Investigation phase: Final report: Dissemination  
State: New South Wales   Occurrence type: Control - Other  
Release date: 04 October 2018   Occurrence class: Technical  
Report status: Final   Occurrence category: Accident  
  Highest injury level: None  

Aircraft details

Aircraft details
Aircraft manufacturer Aeroprakt Ltd  
Aircraft model A22LS Foxbat  
Aircraft registration 24-7930  
Serial number 088  
Type of operation Private  
Sector Sport and recreational  
Damage to aircraft Substantial  
Departure point Mt Jack Station, NSW  
Destination Mt Jack Station, NSW  
Last update 14 November 2018