{"id":"F2006B07290","name":"AD/TB10/22 Amdt 1 - Front Seats","slug":"ad-tb10-22-amdt-1-front-seats","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49252,"registerId":"commonwealth-F2006B07290-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TB10/22 Amdt 1 - Front Seats","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)  \nAerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes\n\nAD/TB10/22\n\nAmdt 1\n\n  \nFront Seats 13/94\n\nApplicability: Model TB9 and TB10 aircraft front seats with a tilting back-rest, installed from February 1991 on aircraft up to serial number 1479; except aircraft serial numbers 1192, 1193, 1308, 1426 through 1433, 1448, 1461, 1462, 1464 through 1469, 1471,\n\nand 1473 through 1477.\n\nRequirement: Action in accordance with Socata TB Service Bulletin 10-075-25 Amendment 1.\n\nNote: DGAC AD 94-114(A)R1 refers.\n\nCompliance: Unless already accomplished, within 50 hours time in service after 8 December 1994, or at the next inspection for maintenance release issue, whichever occurs first.\n\nBackground: The DGAC requires reinforcement of the front seat structure.\n\nAmendment 1 is issued to reflect an amendment of the manufacturer’s bulletin which clarifies applicability and weld filler material.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose — addressing a specific structural safety issue with front seats in defined Socata aircraft. The amendment merely refines technical details (applicability boundaries and weld filler specifications) without expanding the directive's scope."},"complexity_factors":["Single, discrete safety requirement (seat reinforcement)","Limited applicability scope (specific aircraft models, date range, and serial number exceptions)","No nested conditional logic or cross-referencing to other legislation","Only one defined term implicitly used ('time in service')","Clear compliance deadline with simple alternative trigger (50 hours OR next inspection)","Straightforward amendment purpose (clarifying applicability and materials)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft owners and operators. It applies to specific **Socata TB9 and TB10 light aircraft** built between February 1991 and serial number 1479 (with some exceptions).\n\n**What it does:**\n- Requires owners to **reinforce the front seat structure** in affected aircraft\n- The work must follow the manufacturer's service bulletin (Socata TB Service Bulletin 10-075-25 Amendment 1)\n\n**Who it affects:**\n- Owners and operators of the specified Socata Tobago aircraft models\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\n- **Safety-critical:** The seat structure needs strengthening to prevent potential failure\n- **Legally binding:** Compliance is mandatory — you cannot legally fly the aircraft until the work is done\n- **Time-sensitive:** Must be completed within 50 flight hours after 8 December 1994, or at the next scheduled maintenance check (whichever comes first)\n\n**Key change in this amendment:**\n- Updates the original directive to match a revised manufacturer bulletin that clarifies exactly which aircraft are affected and what welding materials to use"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 updates the manufacturer’s service bulletin and clarifies applicability and the required weld filler material, which alters which serial-numbered aircraft are subject to the reinforcement and specifies the repair material to be used (Amendment 1; Applicability)."},"complexity_factors":["Narrow technical scope limited to front seats on specific TB9/TB10 serial numbers (Applicability)","Detailed list of serial-number exceptions requires cross-checking individual aircraft records (Applicability)","Compliance depends on an external manufacturer document (Socata TB Service Bulletin 10-075-25 Amendment 1) for the technical method and materials (Requirement)","Short, conditional compliance timeframe (50 hours time in service or next maintenance inspection) creates scheduling and operational constraints (Compliance)","Amendment clarifies weld filler material, adding a discrete technical material specification to follow (Amendment 1)"],"plain_english_summary":"### What this instrument does\nThis airworthiness directive requires reinforcement of the front seat structure on certain Aerospatiale (Socata) TB9 and TB10 (Tobago) aeroplanes that have a tilting back-rest and were fitted from February 1991 up to serial number 1479, with a list of specific serial-number exceptions (Applicability). The work must be carried out in the manner set out in Socata TB Service Bulletin 10-075-25 Amendment 1 (Requirement). Compliance must occur within 50 hours time in service after 8 December 1994, or at the aircraft's next maintenance inspection required to issue a maintenance release, whichever happens first (Compliance). The text notes that the French DGAC AD 94-114(A)R1 is related (Note). (Background and Amendment 1 explain that the DGAC required the reinforcement and that Amendment 1 clarifies applicability and the weld filler material.)\n\n### Who is affected\n- Owners and operators of Aerospatiale (Socata) TB9 and TB10 aeroplanes that match the stated applicability (Applicability). Serial numbers listed in the applicability are excluded from the directive.\n- Maintenance organisations or engineers who must perform the reinforcement in accordance with the manufacturer’s service bulletin (Requirement).\n\n### Why it matters (mechanical effect)\n- The directive changes the required maintenance of affected aircraft by mandating a specific structural reinforcement of the front seat assembly (Requirement; Background). That requires work to be scheduled and performed according to the manufacturer's instructions (Requirement).\n- The manufacturer’s amended bulletin also specifies the weld filler material to be used (Amendment 1), so the technical method and materials are prescribed.\n\n### Who pays, who decides, and what behaviour changes\n- Aircraft owners/operators bear the cost and responsibility of arranging and paying for the reinforcement work and any associated downtime (Applicability; Requirement; Compliance). The directive sets the deadline for completion (Compliance).\n- The Civil Aviation Safety Authority issues the mandatory directive; the manufacturer’s service bulletin prescribes the technical method to comply (Requirement; Note). Maintenance organisations must follow the bulletin to meet the AD.\n- Affected parties must schedule the work within the stated time window or at the next maintenance inspection for maintenance release, so operators will change maintenance scheduling and potentially incur labour and parts costs (Compliance).\n\n### Trade-offs, implementation and compliance points to note\n- The directive cross-references an external document (Socata service bulletin) for the detailed technical steps and materials, so compliance requires access to and reliance on that bulletin (Requirement).\n- Amendment 1 changes the manufacturer’s bulletin to clarify exactly which serial numbers are affected and the weld filler material (Amendment 1). That alters which aircraft must comply and specifies repair materials (Amendment 1).\n- The AD provides a short compliance window (50 hours time in service or next maintenance inspection), which creates a scheduling constraint for operators and maintenance providers (Compliance).\n- There are explicit serial-number exceptions in the applicability list; those aircraft are not required to undergo this reinforcement (Applicability).\n\n(References: Applicability; Requirement; Compliance; Note; Background; Amendment 1.)"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-22-amdt-1-front-seats","history":"/api/acts/ad-tb10-22-amdt-1-front-seats/history","analysis":"/api/acts/ad-tb10-22-amdt-1-front-seats/analysis","conflicts":"/api/acts/ad-tb10-22-amdt-1-front-seats/conflicts","importantCases":"/api/acts/ad-tb10-22-amdt-1-front-seats/important-cases","documents":"/api/acts/ad-tb10-22-amdt-1-front-seats/documents"}}