{"id":"F2006B07298","name":"AD/TB10/3 Amdt 1 - Stabilator - Inspection/Replacement and Rear Fuselage Modification","slug":"ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49276,"registerId":"commonwealth-F2006B07298-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TB10/3 Amdt 1 - Stabilator - Inspection/Replacement and Rear Fuselage Modification","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/TB10/3\n\nAmdt 1\n\n  \n\nStabilator \\- Inspection/Replacement and Rear Fuselage Modification\n\n  \n6/82\n\nApplicability: All model TB9 and TB10 aircraft with serial numbers up to and including 274 which have not been modified in accordance with Rallye TB SB No. 15 GR. 55-09.\n\nRequirement: 1. Remove the tail cone and inspect the stabilator spar for fatigue cracks in the region of the lower attachment bolts for the two centre hinge brackets, as shown in Rallye TB No. 14 GR.55-08. It is recommended that a visual inspection using a 10X glass, or a dye penetrant inspection, should be performed.\n\nNote: If removal of paint and/or anodised layer is necessary, it is recommended that solvent and/or fine emery paper be used, rather than “pickling” or “vapour blasting” as specified in the above TB SB.\n\n2. Replace the stabilator, and modify the rear fuselage, in accordance with Rallye SB TB No. 15 FR.55-09.\n\nCompliance: For Para. 1 \\- As detailed in TB SB No. 14 GR.55-08. For Para. 2 \\- As detailed in TB SB No. 15 GR.55-09.\n\nBackground: As a result of fatigue cracks found in service, the manufacturer has established that replacement of the stabilator and reinforcement of the rear fuselage are necessary.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is an amendment (Amdt 1) to an existing Airworthiness Directive. The scope remains tightly focused on the original safety issue: stabilator fatigue cracks in specific Socata aircraft. The amendment appears to refine or update the original directive without expanding its purpose beyond the specific airworthiness concern."},"complexity_factors":["Single, specific aircraft type and serial number range (narrow applicability)","Only two main requirements (inspection and replacement/modification)","References external technical documents (Service Bulletins) rather than reproducing full specifications","Minimal defined terms (only standard aviation terminology)","No nested exceptions or conditional logic","Short document (approximately 200 words)"],"plain_english_summary":"CASA's mandatory AD targets Socata TB9/TB10 Tobago aircraft (serials ≤274), requiring removal of the tail cone and close inspection of the stabilator spar for fatigue cracks and, where cracks are found or as a precaution, replacement of the stabilator and reinforcement of the rear fuselage per the manufacturer. Cracks found in service could cause tail failure and loss of control, so inspections/repairs are legally required; avoid harsh surface‑preparation methods."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"This amendment moves beyond inspection alone to require replacement of the stabilator and reinforcement/modification of the rear fuselage for affected aircraft (serials ≤274 not already modified per SB No.15), thereby expanding prescribed corrective action from detection to mandatory structural repair in line with Rallye SB No.15."},"complexity_factors":["Technical inspection method: requires tail cone removal and close inspection of stabilator spar (visual 10× or dye‑penetrant recommended) — operational skill and tooling needed.","Cross‑reference to external documents: compliance depends on Rallye TB SB No.14 GR.55‑08 and SB No.15 GR.55‑09, creating dependency on obtaining and following those service bulletins.","Action escalation: two distinct steps — initial inspection (Para.1) and mandatory replacement/modification (Para.2) — may require chassis/structural work and parts procurement.","Applicability limitation: applies only to serial numbers ≤274 that have not been modified per SB No.15, requiring record checks and administrative verification.","Material treatment constraint: recommends solvent/fine emery for paint/anodising removal and discourages pickling/vapour blasting, which affects approved maintenance processes and tooling.","Compliance burden: work may require certified maintenance organisations, structural reinforcement procedures, and aircraft downtime.","Traceability and verification: compliance language points to conformity with SBs rather than prescribing detailed steps in the AD, leaving some implementation detail to the SBs and maintainers."],"plain_english_summary":"This airworthiness directive affects owners/operators of Aerospatiale (Socata) TB9 and TB10 (Tobago) aircraft with serial numbers up to 274 that have not had Rallye TB SB No.15 modifications. It requires removal of the tail cone to inspect the stabilator spar for fatigue cracks and, where indicated, replacement of the stabilator and modification/reinforcement of the rear fuselage in accordance with the Rallye service bulletins. The measure responds to in‑service fatigue findings and creates inspection, repair, and downtime costs for affected aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification","history":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification/history","analysis":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification/analysis","conflicts":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification/conflicts","importantCases":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification/important-cases","documents":"/api/acts/ad-tb10-3-amdt-1-stabilator-inspection-replacement-and-rear-fuselage-modification/documents"}}