{"id":"F2006B09697","name":"AD/F27/130 Amdt 3 - Ageing Aircraft Modifications","slug":"ad-f27-130-amdt-3-ageing-aircraft-modifications","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115856,"registerId":"commonwealth-F2006B09697-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/130 Amdt 3 - Ageing Aircraft Modifications","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)  \nFokker F27 Series Aeroplanes\n\nAD/F27/130\n\nAmdt 3\n\n  \nAgeing Aircraft Modifications 11/94\n\nApplicability: Model F27 (except Mk 050), with serial numbers as listed in Appendices I and II of the Requirement Document.\n\nRequirement: Action in accordance with the technical requirements of RLD AD 91-058/5 (A) Correction.\n\nNote: Fokker Report No SE-278, Issue No 3 refers.\n\nCompliance: As specified in the Requirement Document.\n\nThe compliance of the previous issue of this Directive remains unchanged. This Amendment is effective from 13 October 1994.\n\nBackground: The Country of Origin Airworthiness Authority requires terminating action in lieu of special repetitive inspections to insure the continued structural integrity of older aircraft.\n\nAmendment 1 introduced a revision of SB F27/55-61.\n\nAmendment 2 introduced a revision of SB F27/57-68, and the re-issue of Fokker Report No SE-278.\n\nAmendment 3 is issued to introduce a correction of Fokker SB F27/57-68 Revision 1 in Appendix I of the Requirement Document.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This amendment is purely corrective — it fixes a technical error in Appendix I of the requirement document without expanding the scope of affected aircraft or changing the fundamental safety requirement. The original intent (mandating structural modifications for ageing Fokker F27 aircraft) remains unchanged across all three amendments."},"complexity_factors":["Heavy reliance on external technical documents not reproduced in the directive itself (RLD AD 91-058/5, Fokker Report SE-278 Issue 3, SB F27/55-61, SB F27/57-68)","Multiple amendment history requiring cross-referencing (Amendments 1, 2, and 3) to understand current state","Applicability limited by specific serial numbers in appendices not included in the text","Technical aviation terminology requiring specialised knowledge (terminating action, special repetitive inspections, structural integrity)","Nested document references: the directive references a requirement document, which references service bulletins, which reference a Fokker report"],"plain_english_summary":"This CASA Airworthiness Directive orders owners/operators of older Fokker F27 aircraft (excluding Mk 050) to carry out permanent structural modifications to eliminate fatigue-prone areas rather than rely on repetitive inspections. It affects airlines and maintenance engineers responsible for those serial-numbered aircraft and provides a terminating action to prevent catastrophic metal-fatigue failure. Effective 13 October 1994, this amendment corrects an earlier bulletin error without changing the original safety requirements or deadlines."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Amendment 3 corrects a Fokker service bulletin entry in the Requirement Document (see 'Amendment 3') but does not alter the Directive's obligations: 'The compliance of the previous issue of this Directive remains unchanged.' The scope of affected aircraft and the requirement to follow RLD AD 91‑058/5 therefore remains the same."},"complexity_factors":["Cross‑references to external technical material: RLD AD 91‑058/5 and Fokker Report SE‑278 (see 'Requirement' and 'Note').","Dependence on a separate Requirement Document for detailed steps and serial‑number lists (Applicability; 'Compliance').","Serial‑number‑specific applicability (Applicability: Model F27 except Mk 050; serials listed in Appendices I and II).","Amendment history and iterative corrections (Background; 'Amendment 1/2/3' notes) requiring operators to track revisions.","Compliance timing and precise actions are not specified in the AD itself (‘Compliance: As specified in the Requirement Document’), increasing reliance on external documents for obligations."],"plain_english_summary":"This amendment requires owners/operators of certain Fokker F27 aeroplanes (specific serial numbers listed in the Requirement Document) to carry out ageing‑aircraft modifications set out by the country‑of‑origin airworthiness authority. Mechanically, it mandates following the technical instructions in RLD AD 91‑058/5 and associated Fokker service documentation; operators pay for and perform the work. The stated purpose is to provide terminating action instead of repeated inspections to maintain structural integrity."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications","history":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications/history","analysis":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications/analysis","conflicts":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications/conflicts","importantCases":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications/important-cases","documents":"/api/acts/ad-f27-130-amdt-3-ageing-aircraft-modifications/documents"}}