{"id":"F2006B04443","name":"AD/BELL 206/129 Amdt 1 - Main Landing Gear Cross Tubes","slug":"ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44280,"registerId":"commonwealth-F2006B04443-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BELL 206/129 Amdt 1 - Main Landing Gear Cross Tubes","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters\n\nAD/BELL 206/129\n\nAmdt 1\n\n  \n\nMain Landing Gear Cross Tubes 9/95 DM\n\nApplicability: All Bell and Agusta Bell 206A, 206B and 206C series.\n\nRequirement: Remove from service, and permanently mark as unserviceable, the cross tube assemblies as follows:\n\na. BHTI P/Nos. 206-050-107, 206-050-119, 2060-50-134, 206-050-157, 206-050-\n\n169, 206-053-109, 206-053-119 and 206-053-129, (all dash numbers); or\n\nb. Airborne Supply Inc. P/Nos AB206-050-107, AB206-050-119, AB206-053-\n\n109, (all dash numbers); or\n\nc. unidentified assemblies.\n\nNote: FAA AD 95-11-14 and Bell Alert Service Bulletins 206-94-78, 206-94-81, 206- 94-82, 206-94-83, 206L-94-93, 206L-94-97 and 206L-94-98 refer.\n\nCompliance: Prior to 30 September 1995.\n\nBackground: A number of Bell 206 cross tubes have failed, or nearly failed, in Australia and overseas. Some failures have resulted in roll-overs causing serious injury and extensive damage. The cracking that causes failure is unpredictable and hard to detect before safety is compromised.\n\nAmendment 1 aligns the requirements of the Australian Directive with those of the FAA by deleting the eddy current inspection, deleting reference to an approved inspection scheme, and mandating a later terminating action compliance date.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2007},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The amendment narrowed the scope of permitted compliance actions by deleting the eddy current inspection option and references to approved inspection schemes, making removal the sole terminating action. Simultaneously, it extended the compliance deadline, altering the temporal scope."},"complexity_factors":["Specific enumeration of part numbers across two manufacturers plus unidentified assemblies","Reference to external FAA directives and manufacturer service bulletins for technical context","Amendment structure modifies previous compliance options (deletion of inspection alternatives)"],"plain_english_summary":"This airworthiness directive mandates permanent removal and marking as unserviceable of certain main landing-gear cross tubes on Bell 206A/B/C helicopters (specific Bell- or Airborne-made or unidentified assemblies). Removal is a terminating action: the tubes cannot be returned to service.\n\nIt responds to unpredictable, hard-to-detect cracking that has caused rollovers, serious injuries, and damage. The rule eliminates the prior eddy‑current inspection option but gives operators additional time to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes","history":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes/history","analysis":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes/analysis","conflicts":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes/conflicts","importantCases":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes/important-cases","documents":"/api/acts/ad-bell-206-129-amdt-1-main-landing-gear-cross-tubes/documents"}}