{"id":"F2006B06257","name":"AD/PL 12/11 Amdt 1 - Nose Wheel Pivot Pin - Inspection and Replacement","slug":"ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47247,"registerId":"commonwealth-F2006B06257-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PL 12/11 Amdt 1 - Nose Wheel Pivot Pin - Inspection and Replacement","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nTransavia PL 12 Series Aeroplanes\n\nAD/PL 12/11\n\nAmdt 1\n\n  \n\nNose Wheel Pivot Pin \\- Inspection and Replacement\n\n  \n5/75\n\nApplicability: All models with S/Nos. prior to G576 not incorporating SB No. 27.\n\nRequirement: 1. Check nosewheel pivot pin P/N 6-24 for correct torque in accordance with Transavia PL-12 Maintenance Manual.\n\n    2. Replace nose wheel pivot pin if torque is found incorrect.\n\n    3. Remove pivot pin and inspect for wear, cracks and signs of abnormal loading. Compliance: For Para. 1 - Within 10 hours time in service after 10 September 1973.\n\nFor Para. 2 \\- Before further flight.\n\nFor Para. 3 \\- At next inspection for issue of maintenance release completed after 10 September 1973 and thereafter at intervals not exceeding 100 hours time in service.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is an Airworthiness Directive (AD)—a standard safety instrument issued under the Civil Aviation Regulations. It addresses a specific technical defect in a specific aircraft type. There is no indication of scope creep; it remains tightly focused on the nose wheel pivot pin issue for the Transavia PL-12 series."},"complexity_factors":["Single, specific aircraft type and serial number range","Only 3 procedural requirements with clear compliance deadlines","Minimal defined terms (only standard aviation abbreviations like P/N, S/Nos., SB, TIS implied)","No cross-references to other legislation or complex conditional logic","Straightforward temporal compliance framework (hours in service, calendar dates)"],"plain_english_summary":"This is a **safety directive for specific small aircraft** (Transavia PL-12 series, also known as the \"Airtruk\"). It mandates urgent inspections and potential replacement of a critical part—the nose wheel pivot pin—on older models.\n\n**Who it affects:**\n- Owners and operators of Transavia PL-12 aircraft with serial numbers before G576 that haven't had a specific factory modification (Service Bulletin No. 27).\n- Licensed aircraft maintenance engineers who perform inspections.\n\n**What it requires:**\n1. **Torque check:** Within 10 flight hours after 10 September 1973, mechanics must check that a specific bolt (part number 6-24) holding the nose wheel is tightened to the correct tension.\n2. **Immediate replacement:** If the bolt isn't tight enough (or is too tight), it must be replaced before the plane flies again.\n3. **Ongoing inspections:** At every regular maintenance check after September 1973, and at least every 100 flight hours, the bolt must be removed and checked for wear, cracks, or damage from stress.\n\n**Why it matters:**\nA loose or cracked nose wheel pivot pin could cause the front wheel to fail during takeoff, landing, or taxiing—potentially causing loss of control and a crash. This directive was issued after the type's original certification to address a discovered safety defect in the field."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument is labelled as Amendment 1 to AD/PL 12/11 and therefore modifies the existing AD framework. The text sets the operative scope as all Transavia PL-12 models with serial numbers prior to G576 that have not incorporated Service Bulletin No. 27, and prescribes specific inspection, replacement and recurring inspection obligations with defined compliance windows (Applicability; Requirement 1–3; Compliance). The supplied text does not include the earlier version of AD/PL 12/11, so the direction or magnitude of the change from the original AD (narrowing, widening, or clarifying scope) cannot be determined from this document alone; what is clear from the amendment is the current applicability test and the concrete compliance requirements."},"complexity_factors":["Narrow technical focus on a single part (pivot pin P/N 6-24) reduces breadth of issues to consider.","Applicability limited by serial-number cut-off (S/N prior to G576) and by incorporation of a specific Service Bulletin (SB No. 27), which creates a binary applicability test.","Multiple, distinct compliance timeframes (initial check within 10 hours; replacement before further flight; removal/inspection at next maintenance-release inspection and thereafter every 100 hours) require scheduling and record-keeping.","Reference to the manufacturer’s maintenance manual for the correct torque introduces dependence on an external technical document for execution.","Clear, prescriptive actions (check, replace, inspect) leave little regulatory discretion but require operational coordination (parts, labour, downtime)."],"plain_english_summary":"This AD mandates that operators of Transavia PL‑12 aeroplanes (S/Ns before G576 that haven’t incorporated Service Bulletin No. 27) must verify nose‑wheel pivot pin torque per the PL‑12 Maintenance Manual, replace any pin with incorrect torque before flight, and remove and inspect the pin for wear/cracks at the next maintenance‑release inspection and every 100 hours thereafter.\n\nIt affects owners, operators and maintenance organisations, imposes short delivery windows and recurring inspection costs, and is intended to prevent nose‑wheel failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement","history":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement/history","analysis":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement/analysis","conflicts":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement/conflicts","importantCases":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement/important-cases","documents":"/api/acts/ad-pl-12-11-amdt-1-nose-wheel-pivot-pin-inspection-and-replacement/documents"}}