{"id":"F2006B06129","name":"AD/PC-6/26 - Aileron and Flap Support Bracket - Inspection and Modification","slug":"ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46905,"registerId":"commonwealth-F2006B06129-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PC-6/26 - Aileron and Flap Support Bracket - Inspection and Modification","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)  Pilatus Porter PC-6 Series Aeroplanes\n\n \n\n# AD/PC-6/26 Aileron and Flap Support Bracket - Inspection\n\nand Modification Applicability: All models including S/Nos. prior to 544 excluding S/No. 540. Document:               Pilatus SB No. 84.\n\n# 11/68\n\nCompliance: Within 100 hours time in service from 4 November 1968. Modify before 1 July 1969.\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\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a historical airworthiness directive from 1968 with a narrow, specific scope addressing a known structural defect in a particular aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 substantive requirements (inspection and modification)","Single defined applicability criterion (serial number range)","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","Clear, fixed deadlines with no conditional logic or exceptions","References only one technical document (Pilatus Service Bulletin No. 84)","No nested definitions or interpretive provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to **Pilatus Porter PC-6 series aeroplanes** (a type of single-engine turboprop aircraft used for transport, skydiving, and utility work).\n\n**What it requires:**\n- **Inspection:** Owners and operators must inspect the **aileron and flap support brackets** (metal parts that connect the wing flaps and ailerons to the aircraft structure) within **100 hours of flying time** starting from 4 November 1968.\n- **Modification:** The brackets must be modified before **1 July 1969**.\n\n**Why it matters:**\nThese brackets are critical structural components. If they fail, the pilot could lose control of the aircraft's roll (aileron) or lift devices (flaps), potentially causing a crash. This directive forces operators to check for defects and install improvements to prevent structural failure.\n\n**Who must comply:**\nAnyone operating a Pilatus PC-6 with serial numbers before 544 (except serial number 540), regardless of where they fly in Australia."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD text states a single, focused requirement covering specific Pilatus PC-6 serial numbers and sets explicit compliance deadlines (Applicability; Compliance). There is no indication in the provided text that the applicability or obligations have been amended or expanded from the directive as written; the scope appears unchanged."},"complexity_factors":["Narrow, clearly stated applicability limited to specific serial-number ranges (Applicability).","Short, explicit compliance timeline that uses both flight hours from a start date and a fixed calendar deadline (Compliance: \"Within 100 hours time in service from 4 November 1968. Modify before 1 July 1969.\").","Technical detail is delegated to an external manufacturer service bulletin (Pilatus SB No. 84), requiring operators to obtain and follow that document (Document: Pilatus SB No. 84).","No technical steps or alternatives are set out in the AD text itself, so understanding exact work scope depends on the service bulletin (Document: Pilatus SB No. 84).","Administrative clarity is high (who must act, when), but operational complexity depends on maintenance capacity and access to the referenced service bulletin."],"plain_english_summary":"Owners/operators of specified Pilatus PC‑6 (Porter) aircraft must have the aileron and flap support bracket inspected and modified per Pilatus Service Bulletin No. 84. CASA mandates compliance within 100 flight hours from 4 Nov 1968 and completion by 1 July 1969; operators arrange and pay for qualified maintenance. The directive enforces airworthiness while the manufacturer’s SB provides the technical steps."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification","history":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification/history","analysis":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification/analysis","conflicts":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification/conflicts","importantCases":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification/important-cases","documents":"/api/acts/ad-pc-6-26-aileron-and-flap-support-bracket-inspection-and-modification/documents"}}