{"id":"F2006B06338","name":"AD/PROCTOR/1 Amdt 1 (Re-Issue) - Wing Rib to Aileron Spar Joint - Inspection","slug":"ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47523,"registerId":"commonwealth-F2006B06338-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PROCTOR/1 Amdt 1 (Re-Issue) - Wing Rib to Aileron Spar Joint - 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/1\n\nAmdt 1 (Re-Issue)\n\n\nWing Rib to Aileron Spar Joint - Inspection 9/67\n\n \n\nApplicability: All Mk. I, Mk. II and Mk. III not modified in accordance with Percival Mods. Nos.\n\n130 or 590 as appropriate.\n\n \n\nRequirement: 1. Inspect the points of attachment of the outer wing ribs to the aileron false spar.\n\n \n\n2. If the areas show signs of faulty gluing or failure of joints, strengthen the rib to spar attachment in accordance with Proctor Modifications Nos. 130(Mk. I) and 590 (Mk’s II and III), or\n\n \n\nDCA/PROCTOR/1A, or A.N.O. 105.1.26.0.2.1\n\nCompliance: At intervals not exceeding 12 months or 100 hours time in service, whichever occurs first.\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 routine re-issue of an existing Airworthiness Directive (originally issued 9/67). The scope remains tightly focused on the specific structural inspection requirement for Percival Proctor aircraft. No expansion of scope is evident."},"complexity_factors":["Single, specific mechanical inspection requirement with clear trigger condition","Only 3 defined model variants in applicability (Mk. I, II, III) with 2 explicit modification exemptions","Simple binary compliance logic: inspect → if failed, repair using one of 3 prescribed methods","Straightforward temporal compliance trigger (12 months OR 100 hours — whichever first)","No nested exceptions, no cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Document is essentially a one-page safety bulletin, not a statute with operative provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of **Percival Proctor Series aeroplanes** (specifically Mk. I, Mk. II, and Mk. III models) to regularly inspect a particular part of the wing structure — where the outer wing ribs connect to the aileron false spar (a structural component near the wing's control surfaces).\n\n**Who it affects:**\nAnyone who owns or operates these specific Percival Proctor aircraft models, **unless** the plane has already been modified according to Percival Modifications 130 or 590.\n\n**What must be done:**\n- **Inspect** the wing rib-to-spar attachment points for signs of glue failure or joint weakness\n- **If problems are found:** Strengthen the connection using one of three approved methods:\n  - Percival Modification 130 (for Mk. I) or 590 (for Mk. II and III)\n  - Alternative repair scheme DCA/PROCTOR/1A\n  - Air Navigation Order 105.1.26.0.2.1\n\n**How often:**\nEvery **12 months** or every **100 hours of flight time** — whichever comes first.\n\n**Why it matters:**\nStructural failures in wing attachments can lead to catastrophic loss of control. This directive prevents accidents by catching glue degradation and joint failures before they become dangerous."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text is an amendment/re‑issue of AD/PROCTOR/1 but does not state any expansion or narrowing of applicability or requirements within this instrument. It applies to Percival Proctor Mk. I, II and III aircraft not already modified per Percival Mod. No. 130 or No. 590 (Applicability), requires inspection of the rib-to-spar attachment and prescribes remedial modification options (Requirement 1–2), with a specified recurring interval (Compliance). The instrument itself does not indicate a change of scope from prior versions within the supplied text."},"complexity_factors":["Narrow and specific technical scope limited to outer wing rib to aileron false spar joint (Requirement 1).","Simple binary inspection criterion (presence of faulty gluing or joint failure) (Requirement 2).","Clear remedial pathways but multiple referenced documents (Percival Mods Nos. 130 and 590, DCA/PROCTOR/1A, A.N.O. 105.1.26.0.2.1) which require locating and following external technical instructions (Requirement 2).","Recurring compliance interval with an either/or trigger (12 months or 100 hours TIS) adds administrative recurrence (Compliance).","Applicability carve‑out for aircraft already modified increases need to verify modification status for each aircraft (Applicability)."],"plain_english_summary":"This directive requires owners/operators of Percival Proctor Mk I–III aircraft not already modified by the specified Proctor mods to carry out periodic safety inspections of the outer wing rib-to-aileron-false-spar attachment and, where faulty gluing or joint failure is found, to strengthen the attachment using the approved modification or alternative documents.  \n\nInspections repeat every 12 months or 100 flight hours (whichever first); owners bear inspection and repair costs and must use qualified maintenance organisations to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection","history":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection/history","analysis":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection/analysis","conflicts":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection/conflicts","importantCases":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection/important-cases","documents":"/api/acts/ad-proctor-1-amdt-1-re-issue-wing-rib-to-aileron-spar-joint-inspection/documents"}}