{"id":"F2006B11331","name":"AD/MSR/31 - Nose Landing Gear - Yoke Pivot Assembly","slug":"ad-msr-31-nose-landing-gear-yoke-pivot-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57206,"registerId":"commonwealth-F2006B11331-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/MSR/31 - Nose Landing Gear - Yoke Pivot Assembly","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/31 Nose Landing Gear - Yoke Pivot Assembly 5/95\n\nApplicability: All models, all serial numbers Morane Saulnier and Rallye aeroplanes except Rallye 235F model.\n\n \n\nRequirement: Inspect the yoke pivot assembly for cracks using dye penetrant.\n\n \n\nInspect in accordance with Socata Service Bulletin 151.\n\n \n\nNote: DGAC AD 93-143(A) refers.\n\n \n\nCompliance: 1. Inspect in accordance with Requirement within 50 hours time in service from 27 April 1995.\n\n \n\nBackground: Reports have been received that fatigue cracks could form in the nose landing gear yoke pivot assembly due to a manufacturing defect.\n\n \n\nThis AD requires a once only inspection for cracks.\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 discrete, targeted safety directive addressing a specific manufacturing defect in a specific aircraft part. It has not expanded beyond its original purpose of mandating a one-time inspection for crack detection."},"complexity_factors":["Very short document (approximately 200 words)","Only 1 defined term implicitly referenced (dye penetrant — explained via context)","Single, unambiguous compliance requirement with clear deadline","No cross-references to other legislation (only references to technical service bulletin and French aviation authority document)","No conditional logic or exceptions beyond the single model exclusion (Rallye 235F)","Straightforward applicability statement with simple 'all except' structure"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:**\nIt requires owners and operators of certain French-made aeroplanes (the Aerospatiale Rallye series, also known as Morane Saulnier Rallye) to inspect a specific part of the nose landing gear — the \"yoke pivot assembly\" — for cracks.\n\n**Who it affects:**\n- Owners and operators of all Morane Saulnier and Rallye aircraft models\n- **Except** the Rallye 235F model (which is excluded)\n\n**What must be done:**\n- A **one-time inspection** using a technique called **dye penetrant testing** (a method that uses coloured dye to reveal tiny cracks not visible to the naked eye)\n- The inspection must follow specific instructions in **Socata Service Bulletin 151**\n- This must be completed within **50 hours of flying time** after 27 April 1995\n\n**Why it matters:**\nFatigue cracks were discovered in this part due to a manufacturing defect. If left unchecked, these cracks could cause the nose landing gear to fail — potentially during landing, with serious safety consequences. This AD ensures the defect is caught before it causes an accident.\n\n**Key point:** This is a **one-off inspection**, not a recurring requirement. Once done, no further action is required under this directive."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument’s scope, as presented, is concrete and limited: it applies to all Morane Saulnier / Rallye models except the Rallye 235F and mandates a single dye‑penetrant inspection performed per Socata Service Bulletin 151 within 50 hours TIS from 27 April 1995. There is no indication in the provided text that the scope was altered from its stated applicability or requirements. (Applicability; Requirement; Compliance; This AD requires a once only inspection for cracks.)"},"complexity_factors":["Narrow technical focus: single part (nose landing gear yoke pivot assembly) and single defect mode (cracking). (Requirement; Background.)","Single, one‑off action reduces ongoing regulatory complexity but creates a short scheduling window. (This AD requires a once only inspection for cracks; Compliance.)","Use of a specified non‑destructive inspection method (dye penetrant) requires technical competence and facilities. (Requirement.)","Procedural detail is delegated to an external document (Socata Service Bulletin 151), adding a dependency on a separate technical publication. (Inspect in accordance with Socata Service Bulletin 151.)","Regulatory clarity is high (clear applicability and deadline), but the AD text as provided does not state follow‑on repair actions, which pushes complexity into the referenced service bulletin or maintenance procedures. (Requirement; Inspect in accordance with Socata Service Bulletin 151.)"],"plain_english_summary":"This airworthiness directive mandates a one‑time dye‑penetrant inspection of the nose landing gear yoke pivot assembly on Aerospatiale/Morane Saulnier Rallye aeroplanes (all models except Rallye 235F), to be done per Socata Service Bulletin 151 within 50 hours TIS from 27 April 1995. Owners/operators must arrange and fund the inspection. It responds to reported manufacturing‑related fatigue cracks and imposes a short, one‑off compliance cost and downtime risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly","history":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly/history","analysis":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly/analysis","conflicts":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly/conflicts","importantCases":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly/important-cases","documents":"/api/acts/ad-msr-31-nose-landing-gear-yoke-pivot-assembly/documents"}}