{"id":"F2007L00745","name":"AD/TB10/37 - Engine and Nose Landing Gear Mounts","slug":"ad-tb10-37-engine-and-nose-landing-gear-mounts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":64419,"registerId":"commonwealth-F2007L00745-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aerospatiale (Socata) TB9 and TB10 (Toba","sectionType":"division","heading":"Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes","content":"### Aerospatiale (Socata) TB9 and TB10 (Tobago) Series Aeroplanes\n\n| AD/TB10/37 | Engine and Nose Landing Gear Mounts | 4/2007 |\n| ---------- | ----------------------------------- | ------ |\n\n| Applicability: | Model TB 9 and TB 10 aircraft, all serial numbers.                                                                                                                                                                                                                                                                                                                                                            |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Update the Aircraft Maintenance Manual by incorporating EADS Socata TB 9 Maintenance Manual Chapter 4 Revision 18 or EADS Socata TB 10 Maintenance Manual Chapter 4 Revision 18, as applicable.Modify the operator’s maintenance program accordingly to comply with all limitations from the Airworthiness Limitations Section of the respective Maintenance Manual Chapter 4.Note: EASA AD 2007-0034 refers. |\n| Compliance:    | From the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Airworthiness Directive becomes effective on 12 April 2007.                                                                                                                                                                                                                                                                                                                                              |\n| Background:    | The EASA requires introduction of the new 10,000 flight hour life limit for engine and nose landing gear mounts into the operator’s maintenance program.                                                                                                                                                                                                                                                      |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n1 March 2007","sortOrder":0},{"sectionNumber":"AD/TB10/37","sectionType":"part","heading":"AD/TB10/37","content":"## AD/TB10/37","sortOrder":1},{"sectionNumber":"Engine and Nose Landing Gear Mounts","sectionType":"part","heading":"Engine and Nose Landing Gear Mounts","content":"## Engine and Nose Landing Gear Mounts","sortOrder":2},{"sectionNumber":"4/2007","sectionType":"part","heading":"4/2007","content":"## 4/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive does not indicate any change from an earlier scope. It introduces a specific life limit and requires incorporation of a specified Maintenance Manual revision for all TB9/TB10 serial numbers; no expansion or narrowing of applicability is stated."},"complexity_factors":["Single, targeted technical change (introduction of a 10,000 flight‑hour life limit) reduces legal scope (Background).","Obligations are procedural: incorporate a specific Maintenance Manual chapter and amend the operator maintenance program (Requirement).","Applies to all serial numbers of two models, increasing universality but not creating model‑specific variations (Applicability).","Administrative burden on operators to update manuals, modify programs and maintain hour‑tracking records (Requirement; Compliance).","Compliance effective date is fixed (12 April 2007), creating a clear deadline for operators (Compliance).","No discretionary exemptions or complex testing/inspection regimes set out in the directive — limited regulatory discretion (Requirement)."],"plain_english_summary":"Requires operators of Aerospatiale (Socata) TB9 and TB10 aircraft to update their Aircraft Maintenance Manual by incorporating EADS Socata TB9/TB10 Maintenance Manual Chapter 4 Revision 18 and to amend maintenance programs to adopt the Airworthiness Limitations, including a new 10,000 flight‑hour life limit for engine and nose‑landing‑gear mounts. It applies to all serial numbers and takes effect 12 April 2007. Operators bear the costs of manual revisions, life‑tracking and any earlier part replacements; compliance and record‑keeping start on the effective date."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow airworthiness directive targeting a specific maintenance requirement for two specific aircraft models. The scope remains tightly focused on the original safety issue (life limits for engine and nose landing gear mounts) without expansion into broader operational or regulatory matters."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (model and serial number)","Single, straightforward compliance action (incorporate specific manual revision)","No nested exceptions or conditional logic","No cross-references to other Australian legislation (only references EASA AD 2007-0034 for background)","Clear, unambiguous effective date and compliance deadline"],"plain_english_summary":"This AD requires owners/operators of Aerospatiale (Socata) TB9 and TB10 Tobago aircraft to update their maintenance manuals and programs to incorporate Revision 18 of Chapter 4, which imposes a 10,000 flight‑hour life limit on engine mounts and nose landing‑gear mounts.\n\nIt affects all TB9/TB10 aircraft and their maintenance organisations because these mounts are critical to structural safety; non‑compliance grounds the aircraft."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts","history":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts/history","analysis":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts/analysis","conflicts":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts/conflicts","importantCases":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts/important-cases","documents":"/api/acts/ad-tb10-37-engine-and-nose-landing-gear-mounts/documents"}}