{"id":"F2006B05528","name":"AD/PA-24/3 - Nose Wheel Steering Arm Mounting Bracket - Reinforcement","slug":"ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46419,"registerId":"commonwealth-F2006B05528-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-24/3 - Nose Wheel Steering Arm Mounting Bracket - 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-24 (Comanche) Series Aeroplanes\n\n \n\nAD/PA-24/3 Nose Wheel Steering Arm Mounting NK\n\nBracket - Reinforcement\n\n \n\nApplicability: Model PA-24-250 with S/Nos. 24-105, -107, -109, -111, -113, -117, -119, -121, -123,\n\n-125, -128, -129, -131, -134, -139 to -141.\n\n \n\nDocument: Piper SB No. 164 Para. VI. Compliance:  Forthwith.\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 airframe component on a limited production run of aircraft. It has not expanded beyond its original purpose of mandating a manufacturer-recommended structural reinforcement."},"complexity_factors":["Extremely short document (approximately 150 words)","Only one substantive requirement (reinforcement per Piper SB 164)","Simple applicability test (specific serial number list)","No defined terms section","No cross-references to other legislation beyond the single service bulletin","Single compliance deadline ('Forthwith' — immediate)","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Piper PA-24-250 Comanche aircraft to reinforce the nose wheel steering arm mounting bracket.\n\n**What it does:**\n- Mandates immediate reinforcement of a specific structural component on the nose landing gear\n- References Piper Service Bulletin No. 164, Section VI as the technical standard for the repair\n\n**Who it affects:**\n- Owners and operators of Piper PA-24-250 Comanche aircraft with specific serial numbers: 24-105, -107, -109, -111, -113, -117, -119, -121, -123, -125, -128, -129, -131, -134, and -139 through -141\n\n**Why it matters:**\nThe nose wheel steering arm mounting bracket is critical for ground control of the aircraft. Without reinforcement, this component could fail during taxiing, takeoff, or landing, potentially causing loss of directional control and a runway excursion or accident. The \"Forthwith\" compliance requirement means this fix must be done immediately — before further flight."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD, as published, applies only to the listed Model PA-24-250 serial numbers and mandates reinforcement per Piper SB No. 164 paragraph VI with immediate compliance. The text gives no indication that the scope has been changed from an earlier version; it states a targeted, serial-numbered applicability and a single mandated corrective action. (see \"Applicability\", \"Document\", \"Compliance\")"},"complexity_factors":["Very narrow applicability limited to specific serial numbers (reduces scope complexity but increases targeting complexity). (see \"Applicability\")","The AD does not include technical instructions; it depends on an external document (Piper SB No. 164, para. VI) for the required work, creating an implementation dependency. (see \"Document\")","Immediate compliance requirement ('forthwith') shortens the available time for planning, parts procurement and scheduling. (see \"Compliance\")","The AD is concise and leaves procedural details (parts, labour, inspection criteria, record-keeping) to the referenced service bulletin and standard regulatory practice, requiring cross-referencing. (see header and \"Document\")"],"plain_english_summary":"This AD mandates immediate reinforcement of the nose‑wheel steering arm mounting bracket on specified Piper PA‑24‑250 Comanche aircraft (listed serial numbers). Owners/operators must obtain and follow Piper Service Bulletin No. 164, paragraph VI, arrange and pay for the work, and comply forthwith—incurring required parts, labour and downtime to address the identified safety issue."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement","history":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement/history","analysis":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement/analysis","conflicts":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement/conflicts","importantCases":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement/important-cases","documents":"/api/acts/ad-pa-24-3-nose-wheel-steering-arm-mounting-bracket-reinforcement/documents"}}