{"id":"F2006B11322","name":"AD/MSR/23 - Wing Attachment Fittings - Inspection","slug":"ad-msr-23-wing-attachment-fittings-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57179,"registerId":"commonwealth-F2006B11322-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MSR/23 - Wing Attachment Fittings - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Aerospatiale Rallye Series Aeroplanes\n\n \n\nAD/MSR/23 Wing Attachment Fittings - Inspection 6/78\n\nApplicability: All models MS880B, MS880B-D, MS881, MS883, MS885, MS887, Rallye 100S, 100S-D, 100ST, 100ST-D, 150-ST, 150ST-D, with S/Nos. to 2962, 5050 to 5750 and\n\nMS880 S/No. 3000 (except Models 150ST with S/Nos. 2859 to 2861, 2928, 2930 to\n\n2932 and 100St with S/Nos. 2942, 2952 to 2957).\n\n \n\nDocument: Rallye SB No. 129.\n\n \n\nCompliance: Unless already accomplished, before 1 August 1979.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The source text sets out a narrowly targeted requirement (inspect wing attachment fittings on specified Rallye models/SNs) and gives a single compliance deadline. The AD text provides no indication that its scope has been altered from an earlier or original version; it applies as stated to the listed models and serial numbers. (Applicability; Compliance)"},"complexity_factors":["Narrow, specific applicability limited to enumerated models and serial-number ranges (Applicability)","Single required action (inspection) with a single fixed deadline (Compliance)","Delegation of procedural detail to an external service bulletin rather than inclusion in the AD (Document: Rallye SB No. 129)","No alternative compliance paths or deferral options provided in the AD text (Compliance)","Historical fixed compliance date (1979) — administrative/time-bound requirement adds urgency but no ongoing complexity (Compliance)"],"plain_english_summary":"What this instrument does (mechanical effect)\n\n- This is an airworthiness directive (AD) that requires an inspection of the wing attachment fittings on identified Aerospatiale Rallye series aeroplanes. The AD refers operators to the technical instructions in \"Rallye SB No. 129\" for the inspection. (Document: Rallye SB No. 129)\n- The inspection must be carried out unless it has already been done, and it must be completed before 1 August 1979. (Compliance)\n\nWho it affects\n\n- Owners and operators of the listed Aerospatiale Rallye models and serial numbers specified under \"Applicability\". Only aircraft whose model and serial number fall within the ranges shown are required to comply. (Applicability)\n\nWhy it matters (stated purpose and practical implications)\n\n- The AD imposes a mandatory technical check on a specific aircraft part (wing attachment fittings) for the enumerated aircraft. The AD text itself does not set out a narrative rationale beyond the regulatory requirement; it instead directs the operator to the referenced service bulletin for inspection procedures and specifies the compliance date. (Document; Compliance)\n\nWho pays, who decides, and what behaviour changes\n\n- Who decides: The Civil Aviation Safety Authority issued this AD under the Commonwealth Civil Aviation Regulations Part 39 framework. (header: Civil Aviation Safety Authority; Schedule of Airworthiness Directives)\n- Who pays: Owners/operators of the affected aircraft bear the cost of performing the inspection and any follow-up maintenance required by the inspection results. (Applicability; Compliance)\n- Behaviour change required: Affected operators must arrange and complete the wing attachment fittings inspection per Rallye SB No. 129 before 1 August 1979, unless the inspection has already been performed. (Document; Compliance)\n\nCompliance burden, discretion and implementation mechanics\n\n- Compliance burden: The AD imposes a single mandatory action (an inspection) to be completed by a fixed date. The exact inspection steps and acceptance criteria are not included in the AD text itself; operators must consult Rallye SB No. 129 for procedural detail. (Document; Compliance)\n- Discretion: The AD text includes no alternative compliance pathway or deferral mechanism; the only explicit exception is if the action has already been accomplished. (Compliance)\n- Concentration of effect: The requirement applies only to the enumerated models and serial-number ranges, so the cost and operational impact are concentrated on the owners/operators of those specific aircraft. (Applicability)\n\nTrade-offs, incentives and implementation risk (source-grounded observations)\n\n- Incentives and costs: Because the AD mandates inspection, operators incur direct costs (labour, possible parts, aircraft downtime). Any safety or operating benefit claimed by a regulator or manufacturer is not stated in the AD text itself; the AD instead relies on the service bulletin for technical detail. (Document; Compliance)\n- Opportunity cost and downtime: The fixed compliance date creates a scheduling requirement that could cause short-term aircraft unavailability while inspections are carried out. (Compliance)\n- Enforcement and clarity risk: The AD is concise and delegates the technical method to the service bulletin; this concentrates implementation knowledge in the referenced SB. If the SB is ambiguous or unavailable to an operator, that could create practical implementation risk. (Document)\n\nKey textual references from the AD\n\n- Applicability: lists the specific Rallye models and serial-number ranges required to comply. (Applicability)\n- Document: Rallye SB No. 129 — the technical instructions to be followed for the inspection. (Document: Rallye SB No. 129)\n- Compliance: the inspection must be completed before 1 August 1979, unless already accomplished. (Compliance)\n"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive focused on a specific safety inspection for a defined aircraft type. It has not expanded beyond its original purpose of ensuring wing attachment fitting integrity."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 defined elements: applicability, document reference, compliance date, and subject matter","Simple conditional logic: applies to listed models AND specific serial number ranges, with explicit serial number exclusions","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Single compliance action required with clear deadline","No nested exceptions or layered conditional provisions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA) that mandates a safety inspection for specific models of Aerospatiale Rallye series aeroplanes.\n\n**What it does:**\n- Requires owners/operators to inspect the **wing attachment fittings** — the critical metal components that connect the wings to the aircraft fuselage\n- The inspection must follow the procedures outlined in **Rallye Service Bulletin No. 129**\n\n**Who it affects:**\n- Owners and operators of specific Aerospatiale Rallye aircraft models (MS880B, MS881, MS883, MS885, MS887, Rallye 100S, 100ST, 150-ST variants, and others)\n- Only applies to aircraft with specific serial numbers (generally those built up to serial number 2962, plus certain ranges)\n- Some serial numbers are explicitly excluded from this directive\n\n**Why it matters:**\nWing attachment fittings are **flight-critical components** — if they fail, the wing could separate from the aircraft with catastrophic consequences. This AD was issued to detect potential structural defects before they cause accidents.\n\n**Compliance deadline:**\nThe inspection had to be completed before **1 August 1979** unless already done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection","history":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection/history","analysis":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection/analysis","conflicts":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection/conflicts","importantCases":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection/important-cases","documents":"/api/acts/ad-msr-23-wing-attachment-fittings-inspection/documents"}}