{"id":"F2006B04004","name":"AD/BEECH 55/60 Amdt 1 - Fuselage Fatigue Life Limitation","slug":"ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43613,"registerId":"commonwealth-F2006B04004-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 55/60 Amdt 1 - Fuselage Fatigue Life Limitation","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)  \n![](image.002.png)  \nBeechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes\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/BEECH 55/60 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/BEECH 55/60\n\nAmdt 1\n\n  \nFuselage Fatigue Life Limitation 12/2000\n\nApplicability: All models 58P and 58PA series. Requirement: Retire the pressure cabin from service. Compliance: Before exceeding 12,830 pressurised flights.\n\nThis Amendment becomes effective on 30 November 2000.\n\nBackground: Analysis and fatigue tests by the manufacturer have established the above pressure cabin life. Amendment 1 clarifies the intent that the applicability includes all pressurised Baron aircraft.\n\nThe original issue of this Airworthiness Directive became effective in February 1981.\n\n![](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 17 October 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 1 November 2000.","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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies that the AD applies to all pressurised Baron aircraft but does not change the substantive requirement to retire the pressure cabin before 12,830 pressurised flights (Requirement; Background). The effective action and threshold remain the same as the AD's original safety measure."},"complexity_factors":["Narrow, model-specific applicability (Applicability): only Beechcraft 58P and 58PA pressurised series are targeted.","Single, bright-line compliance metric (Compliance): retirement triggered at 12,830 pressurised flights — straightforward threshold but requires accurate counting.","Clear, single corrective action (Requirement): 'Retire the pressure cabin from service' is unambiguous in effect but lacks procedural detail on replacement or disposition.","Operator record-keeping burden (Compliance): operators must track and verify pressurised‑flight counts for each pressure cabin.","Financial/operational impact on operators (Requirement/Background): retiring cabins imposes direct costs (replacement or aircraft withdrawal) and potential operational disruption.","Limited administrative discretion (Header/Background): CASA delegate revokes prior AD and issues this one; the instrument itself leaves little discretionary detail for operators."],"plain_english_summary":"This Airworthiness Directive requires operators of pressurised Beechcraft Baron 58P and 58PA aeroplanes to retire the aircraft's pressure cabin from service before it has completed 12,830 pressurised flights (Compliance). CASA’s delegate issues and enforces the directive; operators bear the cost of retiring or replacing the cabin and must maintain and verify pressurised‑flight counts. Amendment 1 clarifies that the applicability covers all pressurised Baron aircraft (Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment does not expand scope beyond the original 1981 directive. It merely clarifies existing applicability to ensure all pressurised Baron aircraft are captured. The core safety requirement (12,830 pressurised flight limit) remains unchanged from the original issue."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability categories (58P and 58PA series)","Single, unambiguous requirement with no exceptions or conditional logic","No cross-references to other legislation beyond the enabling regulation (CAR 1998, subregulation 39.1(1))","Clear compliance deadline (specific flight cycle count)","Straightforward background explanation with no technical sub-paragraphs"],"plain_english_summary":"This AD requires all pressurised Beechcraft Baron 58P and 58PA aeroplanes to be permanently retired from pressurised service once they reach 12,830 pressurised flights, to prevent metal‑fatigue failure of the fuselage. \n\nAmendment 1 updates the 1981 directive to clarify the retirement rule applies to every pressurised Baron; owners/operators must track cycles and comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation","history":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation/history","analysis":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation/analysis","conflicts":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation/conflicts","importantCases":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation/important-cases","documents":"/api/acts/ad-beech-55-60-amdt-1-fuselage-fatigue-life-limitation/documents"}}