{"id":"F2006B04895","name":"AD/CERES/6 Amdt 2 - Airframe - Inspection, Modification and Retirement","slug":"ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44713,"registerId":"commonwealth-F2006B04895-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CERES/6 Amdt 2 - Airframe - Inspection, Modification and Retirement","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)  \nC.A.C. CA-28 (Ceres) Series Aeroplanes\n\nAD/CERES/6\n\nAmdt 2\n\n  \nAirframe \\- Inspection, Modification and Retirement 9/99\n\nApplicability: For Paras. 1 and 2 of the requirement all models incorporating wing centre sections with more than 3000 hours time in service and which are not modified in accordance with C.A.C. SB No. 42.\n\nFor Para. 3 of the requirement all models.\n\nRequirement: 1. Inspect the centre section spars in accordance with C.A.C. Service Bulletin No. 42.\n\nNote 1: Particular care must be taken to mask the edges of the composite spar cap before applying paint stripper.\n\n    2. Modify the centre Section spars in accordance with C.A.C. Service Bulletin No. 42.\n\n    3. Retire the aircraft from service.\n\nNote 2: Inspections/Modifications performed in accordance with AD/CA-28/6 Amdt 1 satisfy the requirements of this Directive.\n\nCompliance: For Para. 1: Within 250 hours time in service after 25 November 1969.\n\nFor Para. 2: For aircraft incorporating centre sections from production aircraft S/Nos. 1 & 2 - within 250 hours time in service.\n\nFor aircraft incorporating centre sections from production aircraft S/Nos. 3 and subsequent - within 500 hours time in service after 25 November 1969.\n\nFor Para. 3: On or before achieving 14000 hours total time in service. This Amendment becomes effective on 9 September 1999.\n\nBackground Amendment 1 of this Airworthiness Directive became effective on 31 May 1977.\n\nThe original issue of this Airworthiness Directive became effective on 25 November 1969.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment maintains the original safety purpose of ensuring structural integrity of aging agricultural aircraft. The 1999 amendment appears to be a procedural update (Amendment 2) that references previous compliance (Note 2 states earlier modifications still count) without expanding beyond the original airworthiness safety mandate."},"complexity_factors":["Multiple applicability conditions based on aircraft serial numbers and modification status","Three distinct compliance deadlines tied to flight hours and calendar dates","Cross-reference to external technical document (C.A.C. Service Bulletin No. 42)","Nested applicability: different rules apply to different paragraphs of the requirement","Historical amendment tracking (references to Amendment 1 and original 1969 issue)"],"plain_english_summary":"The Civil Aviation Safety Authority requires owners/operators of C.A.C. Ceres (CA-28 series) crop‑dusters to inspect and strengthen the centre wing spars and to permanently retire each airframe at 14,000 total hours.  \n\nThis targets vintage, heavily used agricultural Ceres aircraft because centre‑section fatigue from decades of low‑level, heavy work can lead to catastrophic wing failure; the rule forces early detection, repair, and eventual grounding to prevent crashes."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument continues to require inspection, modification and mandatory retirement of CA‑28 centre‑section spars. This amendment specifies applicability thresholds (>3,000 hours unless modified), serial‑numbered compliance windows, and a 14,000‑hour retirement limit, and confirms that work done under Amdt 1 meets the directive's requirements."},"complexity_factors":["Conditional applicability: Paras 1 & 2 apply only to aircraft with wing centre sections >3,000 hours and not modified per C.A.C. SB No. 42 (Applicability).","Staggered compliance windows by production serial numbers and service hours (Compliance: Para. 2).","A fixed retirement life-limit of 14,000 total hours applies to all models (Requirement 3; Compliance).","Operational detail and workmanship are deferred to an external document—C.A.C. Service Bulletin No. 42—which contains inspection and modification procedures (Requirements 1–2).","Technical precaution specified for composite spar cap handling (Note 1), adding a specific process requirement during inspection/modification.","Prior-amendment equivalence: actions performed under AD/CA‑28/6 Amdt 1 satisfy this AD (Note 2), which affects enforcement and record assessment."],"plain_english_summary":"This airworthiness directive requires operators of **C.A.C. CA‑28 (Ceres)** aeroplanes to inspect and, if necessary, modify wing centre‑section spars per C.A.C. Service Bulletin No. 42 and to retire aircraft by 14,000 total hours. It applies to models with centre sections exceeding 3,000 hours unless already modified.\n\nOperators must schedule and fund the inspections/modifications within the specified time windows. Work done under the earlier amendment satisfies this directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement","history":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement/history","analysis":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement/analysis","conflicts":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement/conflicts","importantCases":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement/important-cases","documents":"/api/acts/ad-ceres-6-amdt-2-airframe-inspection-modification-and-retirement/documents"}}