{"id":"F2006B08521","name":"AD/CFM56/16 Amdt 1 - High Pressure Turbine Rotor - Inspection","slug":"ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51265,"registerId":"commonwealth-F2006B08521-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CFM56/16 Amdt 1 - High Pressure Turbine Rotor - Inspection","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n![](image.002.png)  \nCFM International Turbine Engines \\- CFM56 Series\n\nAIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD)AD/CFM 56/16 and issues the following AD under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nAD/CFM56/16\n\nAmdt 1\n\n  \nHigh Pressure Turbine Rotor \\- Inspection 9/2000\n\nApplicability: CFM International (CFMI) CFM56-2, \\-3-B1, \\-3B-2, and \\-3C-1 series engines.\n\nRequirement: Perform an eddy current inspection of the High Pressure Turbine front rotating air seal in accordance with procedures in CFM I service bulletin CFM56-2 SB 72-869 dated November 12, 1999, CFM56-3/3B/3C SB 72-922 dated November 12, 1999.\n\nNote: DGAC AD 2000-018(B) and FAA AD 2000-05-22 Amendment 39-11632\n\nrefers.\n\nCompliance: As detailed in the Compliance Requirement contained in CFMI service bulletin CFM56-3/3B/3C SB 72-922 dated November 12, 1999.\n\nThis Amendment becomes effective on 7 September 2000.\n\nBackground: This directive mandates a one time eddy current inspection for cracks in the high pressure turbine front rotating air seal.\n\nThis amendment corrects an engine model reference in the Applicability section of the AD.\n\nThe original issue of this Airworthiness Directive became effective on 10 August 2000.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 1 August 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 9 August 2000.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment makes a minor technical correction to an engine model reference in the applicability section. The scope remains identical to the original AD — a one-time inspection requirement for the same engine family addressing the same safety concern (cracks in the high pressure turbine front rotating air seal)."},"complexity_factors":["Very short document (approximately 250 words)","Only 4 defined engine model variants in applicability section","Single requirement with direct reference to external technical documents (manufacturer service bulletins)","No nested exceptions or conditional logic — straightforward mandate","Simple amendment correcting a single reference error","Minimal cross-referencing (only references superseded AD and foreign regulatory equivalents for information)"],"plain_english_summary":"This AD revokes and replaces an earlier notice to require a one‑time eddy‑current inspection of the high‑pressure turbine front rotating air seal on certain CFM International CFM56‑2, ‑3‑B1, ‑3B‑2 and ‑3C‑1 engines. It affects owners/operators of those engines (commonly used on Boeing 737 Classic and some military types) to detect cracks before failure. This version corrects a typo in the engine model listing; compliance follows the manufacturer service bulletin."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment corrects an engine model reference in the Applicability section, thereby changing which engines the directive applies to compared with the original AD issued 10 August 2000. The delegate revoked the earlier AD and reissued this AD effective 7 September 2000 (Applicability; Background)."},"complexity_factors":["Dependence on external CFMI service bulletins (CFM56-2 SB 72-869 and CFM56-3/3B/3C SB 72-922) for procedures and the compliance schedule (Requirement; Compliance).","Applicability spans multiple CFM56 engine models and the amendment corrects an engine-model reference, altering which engines are covered (Applicability; Background).","The AD revokes and replaces a prior AD, requiring alignment with earlier regulatory actions (revocation language; Background).","Technical nature of the mandated eddy-current inspection requires specialist equipment and skills not specified in the AD itself (Requirement; Background).","Cross-references to foreign ADs (DGAC AD 2000-018(B) and FAA AD 2000-05-22) introduce coordination or conformity considerations (Note)."],"plain_english_summary":"This amendment requires operators of CFM International CFM56‑2, ‑3‑B1, ‑3B‑2 and ‑3C‑1 engines to carry out a one‑time eddy‑current inspection of the high‑pressure turbine front rotating air seal, following the procedures set out in specified CFMI service bulletins (Requirement; Compliance). The CASA delegate revoked the earlier AD and corrected an engine model reference in the Applicability; operators must follow the CFMI compliance schedule to detect cracks (Background; Applicability)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection","history":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection/history","analysis":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection/analysis","conflicts":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection/conflicts","importantCases":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection/important-cases","documents":"/api/acts/ad-cfm56-16-amdt-1-high-pressure-turbine-rotor-inspection/documents"}}