{"id":"F2006B05614","name":"AD/PA-28/57 - Nose Landing Gear Trunnion - Inspection","slug":"ad-pa-28-57-nose-landing-gear-trunnion-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135243,"registerId":"commonwealth-F2006B05614-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/57 - Nose Landing Gear Trunnion - 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)  Piper PA-28 Series Aeroplanes\n\n \n\nAD/PA-28/57 Nose Landing Gear Trunnion - Inspection 8/76\n\nApplicability: All model 28R-200 with S/Nos. 7635001 to 7635249, 7635251 to 7635299, 7635302 to 7635318 and 7635321. In addition all models PA-28R-180 and PA-28R-200 that have had nose landing gear trunnion assembly P/N 67054-00V replaced since August 1975.\n\n \n\nDocument: Piper SB No. 510.\n\n \n\nCompliance: Within 100 hours time in service after 31 August 1976.\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":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument sets a targeted inspection requirement limited to specified serial numbers and to aircraft with a particular replacement part history; it does not indicate any expansion or narrowing beyond those enumerated criteria. The AD makes compliance with Piper SB No. 510 mandatory within a single, specified time window and does not amend that scope within the text provided (Applicability; Document; Compliance)."},"complexity_factors":["Narrow, clearly enumerated applicability by model and distinct serial number ranges (low scope breadth) (Applicability).","Single mandatory action (inspection) referenced to an external manufacturer service bulletin (Document) — technical detail delegated to another document.","Fixed, straightforward compliance window (within 100 hours time in service after 31 August 1976) (Compliance).","Requirement to check maintenance records for any nose trunnion assembly P/N 67054‑00V replacements since a historical date increases practical compliance work (Applicability).","No branching or conditional requirements in the AD text itself (simple structure)."],"plain_english_summary":"This directive mandates a one‑time inspection of the nose landing gear trunnion (per Piper Service Bulletin No. 510) for specified Piper PA‑28R‑200/180 aeroplanes identified by serial‑number ranges or by having had trunnion P/N 67054‑00V replaced since August 1975. The inspection must be done within 100 hours TIS after 31 August 1976. Compliance costs (inspection, any repairs/parts) fall to the aircraft owner/operator; CASA enforces the requirement under the Civil Aviation Regulations."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific mechanical defect in a limited aircraft population. It has not expanded beyond its original purpose of mandating a one-time inspection for structural integrity of a specific component."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 4 defined elements: applicability criteria, reference document, compliance deadline, and affected part number","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1998","Simple conditional logic: serial number ranges OR replacement history","Single compliance action with clear deadline (100 hours time in service after fixed date)","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Piper Cherokee Arrow aircraft to inspect the nose landing gear trunnion (the pivot point that connects the front wheel assembly to the aircraft frame).\n\n**Who it affects:**\n- Owners of Piper PA-28R-200 aircraft with specific serial numbers (7635001 to 7635249, 7635251 to 7635299, 7635302 to 7635318, and 7635321)\n- Owners of PA-28R-180 and PA-28R-200 models that have had a specific replacement part (nose landing gear trunnion assembly part number 67054-00V) installed since August 1975\n\n**What it requires:**\n- A mandatory inspection of the nose landing gear trunnion\n- Must be completed within 100 hours of flight time after 31 August 1976\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety instructions. Failure to comply means the aircraft cannot be flown legally. This particular AD addresses potential structural failures in the nose landing gear — a critical component for safe takeoff and landing. The reference to Piper Service Bulletin 510 suggests the manufacturer identified a defect or wear pattern requiring urgent fleet-wide attention."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection","history":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection/history","analysis":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection/analysis","conflicts":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection/conflicts","importantCases":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection/important-cases","documents":"/api/acts/ad-pa-28-57-nose-landing-gear-trunnion-inspection/documents"}}