{"id":"F2006B05444","name":"AD/PA-23/10 - Wing Front Spar Attachment Fitting - Reinforcement","slug":"ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46172,"registerId":"commonwealth-F2006B05444-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/10 - Wing Front Spar Attachment Fitting - Reinforcement","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)  Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/10 Wing Front Spar Attachment Fitting - Reinforcement NK\n\nApplicability: Model PA-23 with S/Nos. prior to 23-322 as detailed in SB. Document:  1. Piper SB No. 142; or\n\n2. FAA AD 55-21-2.\n\n \n\nCompliance: Forthwith.\n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The text does not indicate any amendment or narrowing/widening of scope from a prior instrument. It applies to Model PA-23 aircraft with serial numbers prior to 23-322 as specified and requires reinforcement forthwith, with technical work to follow one of the referenced documents. No statement in the text suggests a change from an earlier stated scope."},"complexity_factors":["Narrow, specific applicability (only Piper PA-23 with S/Ns prior to 23-322) reduces complexity (Applicability line).","Directive is short and prescriptive with a single immediate action required (Compliance: Forthwith).","Technical detail is outsourced to external documents (Piper SB No. 142; FAA AD 55-21-2), which shifts complexity into those referenced materials (Document lines).","No alternative compliance pathways, penalty provisions, or administrative procedures are set out in the text, limiting internal complexity but increasing reliance on external regulatory framework.","Absence of cost, enforcement, or timing detail in the instrument itself creates practical uncertainty for implementers, requiring consultation with the referenced documents or regulator."],"plain_english_summary":"This AD requires immediate reinforcement of the wing front spar attachment fitting on Piper PA‑23 (Apache/Aztec) aeroplanes with serial numbers prior to 23‑322. \n\nAffected owners/operators/maintenance organisations must comply forthwith, using the procedures in Piper Service Bulletin No. 142 or FAA AD 55‑21‑2; the directive itself does not address cost allocation, alternate compliance, or enforcement details."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific structural defect in a specific aircraft model range. It has not expanded beyond its original purpose of mandating wing spar reinforcement."},"complexity_factors":["Very short document (under 200 words)","Only 1 defined term (applicability criteria by serial number)","No cross-references to other legislation beyond two external technical documents (Piper SB and FAA AD)","Single, unambiguous compliance requirement ('forthwith')","No conditional logic, exceptions, or nested provisions","Straightforward applicability test (serial number check)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Piper PA-23 Apache and Aztec aircraft** (serial numbers before 23-322).\n\n**What it requires:**\n- Aircraft owners and operators must **reinforce the wing front spar attachment fitting** — a critical structural component that connects the wing to the fuselage.\n- The work must be done **\"forthwith\"** (immediately, without delay).\n\n**Why it matters:**\n- This addresses a **safety-critical structural weakness**. If the wing spar attachment fails, the wing could separate from the aircraft in flight.\n- The directive references **Piper Service Bulletin No. 142** and **FAA AD 55-21-2**, meaning this is based on known defects identified by the manufacturer and US regulators.\n\n**Who must comply:**\n- Owners and operators of affected Piper PA-23 aircraft with the specified serial numbers.\n- Maintenance organisations servicing these aircraft.\n\n**Key point:** This is a **mandatory safety order**, not optional guidance. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement","history":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement/history","analysis":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement/analysis","conflicts":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement/conflicts","importantCases":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement/important-cases","documents":"/api/acts/ad-pa-23-10-wing-front-spar-attachment-fitting-reinforcement/documents"}}