{"id":"F2006B06347","name":"AD/PROCTOR/8 (Re-Issue) - Aileron Mass Balance Weight - Inspection","slug":"ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47552,"registerId":"commonwealth-F2006B06347-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PROCTOR/8 (Re-Issue) - Aileron Mass Balance Weight - 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)  Percival Proctor Series Aeroplanes\n\n \n\nAD/PROCTOR/8\n\n(Re-Issue)\n\n\nAileron Mass Balance Weight - Inspection 6/50\n\n \n\nApplicability: All marks not modified in accordance with Proctor Mod. No. C1236. Requirement:  1. Percival Civil Technical Instruction No. 4; or\n\n2. DCA/PROCTOR/8, or 3. A.N.O. 105.1.26.2.6.3.\n\nCompliance: At intervals not exceeding 50 hours time in service.\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":4,"scope_assessment":{"changed":false,"description":"The instrument is labelled a re‑issue but the text supplied sets out the same applicability (all marks not modified by Proctor Mod. No. C1236), the same compliance interval (not exceeding 50 hours TIS) and the same listed compliance documents. The supplied text contains no indication that the scope (which aircraft are covered or what inspections are required) has been expanded or narrowed compared with the original; therefore no change of scope is detectable within the text provided."},"complexity_factors":["Narrow technical focus on a specific component (aileron mass balance weight) which requires domain knowledge to inspect and interpret (title and Requirement).","Multiple external cross‑references for compliance (Percival Civil Technical Instruction No. 4; DCA/PROCTOR/8; A.N.O. 105.1.26.2.6.3) increase implementation complexity and document‑management burden (Requirement).","Short recurring compliance interval (every 50 hours time in service) increases operational and scheduling complexity for operators (Compliance).","Applicability condition tied to a specific modification (Proctor Mod. No. C1236) creates a binary exemption path that operators must track for each airframe (Applicability).","The AD text provides prescriptive requirements but no explanatory detail or procedures in itself, so implementers must obtain and rely on the referenced documents for the actual inspection steps (Requirement)."],"plain_english_summary":"This AD mandates recurring inspections of the aileron mass‑balance weight on Percival Proctor aeroplanes not modified by Proctor Mod. No. C1236, to be carried out every 50 hours TIS using one of three specified technical documents. It affects owners, operators and maintenance providers; owners bear inspection and repair costs and can avoid the recurring burden only by adopting the specified one‑off modification."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive focused on a specific mechanical component of a specific vintage aircraft type (Percival Proctor). It has not expanded beyond its original safety purpose."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 1 defined term implied ('time in service')","No cross-references to other legislation beyond the three alternative technical documents listed","Simple conditional logic: applies to all marks EXCEPT those modified per Proctor Mod. No. C1236","Single compliance requirement with clear time interval (50 hours)","No nested exceptions or sub-delegations"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety notice) issued by Australia's Civil Aviation Safety Authority for **Percival Proctor series aeroplanes**.\n\n**What it does:**\n- Requires owners and operators to inspect the **aileron mass balance weights** — small counterweights attached to the aircraft's ailerons (the hinged flaps on the wings that control roll). These weights prevent dangerous flutter (rapid, uncontrolled vibration) that could damage the aircraft or cause loss of control.\n\n**Who it affects:**\n- Anyone who owns or operates a Percival Proctor aircraft **that has NOT been modified according to \"Proctor Mod. No. C1236\"**.\n\n**What must be done:**\n- The inspection must follow one of three specified technical documents:\n  1. Percival Civil Technical Instruction No. 4; or\n  2. DCA/PROCTOR/8; or\n  3. A.N.O. 105.1.26.2.6.3.\n\n**How often:**\n- Every **50 hours of flight time** (\"time in service\").\n\n**Why it matters:**\n- Mass balance weights can crack, corrode, or detach over time. If they fail, the ailerons can flutter at high speeds, potentially causing catastrophic structural failure. This directive prevents accidents by ensuring these critical components are regularly checked."}},"importantCases":[],"_links":{"self":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection","history":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection/history","analysis":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection/analysis","conflicts":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection/conflicts","importantCases":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection/important-cases","documents":"/api/acts/ad-proctor-8-re-issue-aileron-mass-balance-weight-inspection/documents"}}