The two JRA-776-1 fuselage lateral tie rods fitted to de Havilland DH82A Tiger Moth, registered VH-TSG, had significant, pre-existing fatigue cracks in the threaded sections. The parts’ service life was significantly less than the published retirement life for DH82A tie rods of 2,000 flight hours or 18 years).
Initial advice of the safety issue
After determining the nature and significance of the fatigue cracking on the tie rods from VH-TSG, the ATSB advised the following organisations of the safety issue during the period 3-6 February 2014: the Australian Civil Aviation Safety Authority (CASA), the Australian manufacturer of the lateral tie rods, the operator and current maintainer of VH-TSG, the UK Air Accidents Investigation Branch (AAIB), the type certificate holder for Tiger Moth aircraft and the United Kingdom Civil Aviation Authority (UK CAA). Subsequently the Transport Accident Investigation Commission of New Zealand (TAIC) and the Civil Aviation Authority of New Zealand (CAANZ) were also informed.
In addition, on 24 February 2014, the ATSB released the following safety advisory notice to DH82 and DH82A Tiger Moth owners and operators.