CASA has issued a proposed airworthiness directive covering the replacement of tie rods for Tiger Moth aircraft manufactured by Australian company JR Engineering.
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This follows the in-flight break-up of de Havilland DH.82A Tiger Moth VH-TSG off South Stradbroke Island during an aerobatic joy flight in December last year, which killed pilot Alex Rae and French tourist Taissia Umenc.
Notes the proposed AD: “given the criticality of the fuselage lateral tie rods, the ATSB believes that the identification of significant pre-existing fatigue cracking within the JRA-776-1 lateral tie rods on the accident aircraft, which were within the stipulated retirement life, coupled with the current lack of an effective inspection to detect such cracking, presents a safety issue that requires action.”
The incident highlighted risk associated with fatigue cracking leading to failure of lateral tie rods, CASA stated on Thursday.
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Similar proposed Ads have been issued for the DH.60 Moth and DH.83 Fox Moth aircraft.