{"id":"F2008L02861","name":"AD/EMB-145/20 - Horizontal Stabilizer Actuator Clutches","slug":"ad-emb-145-20-horizontal-stabilizer-actuator-clutches","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74745,"registerId":"commonwealth-F2008L02861-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Embraer EMB-135 and EMB-145 Series Aerop","sectionType":"division","heading":"Embraer EMB-135 and EMB-145 Series Aeroplanes","content":"### Embraer EMB-135 and EMB-145 Series Aeroplanes\n\n| AD/EMB-145/20 | Horizontal Stabilizer Actuator Clutches | 9/2008 |\n| ------------- | --------------------------------------- | ------ |\n\n| Applicability: | Embraer EMB-145( ) aircraft equipped with horizontal stabilizer actuators (HSA) bearing Part Number (P/N) 362200-1007, 362200-1009, 362200-1011 or362200-1013.                                                                               |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Inspect for integrity of the clutches in the in-service horizontal stabilizer actuator in accordance with Embraer Service Bulletin No. 145-27-0082, original issue, or later revisions approved by the CTA.Note: DCA AD 2001-10-02R2 refers. |\n| Compliance:    | Initial inspection to be accomplished within 100 flight hours after the effective date of this AD unless previously accomplished.Thereafter repeat the inspection at intervals not to exceed 2000 flight hours.                              |\n|                | This Airworthiness Directive becomes effective on 28 August 2008.                                                                                                                                                                            |\n| Background:    | Instances have been identified concerning the loss of the set point of the horizontal stabilizer actuator clutches.This AD mandates the requirement to check the clutches within the horizontal stabiliser actuator for integrity.           |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n17 July 2008","sortOrder":0},{"sectionNumber":"AD/EMB-145/20","sectionType":"part","heading":"AD/EMB-145/20","content":"## AD/EMB-145/20","sortOrder":1},{"sectionNumber":"Horizontal Stabilizer Actuator Clutches","sectionType":"part","heading":"Horizontal Stabilizer Actuator Clutches","content":"## Horizontal Stabilizer Actuator Clutches","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in specific aircraft. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical component targeted (horizontal stabilizer actuator clutches)","Only 4 specific part numbers in scope","Straightforward compliance timeline: one initial deadline, one recurring interval","Single referenced technical document (Embraer Service Bulletin)","No nested exceptions, conditional logic, or alternative compliance methods","Total length: approximately 150 words of substantive content"],"plain_english_summary":"CASA mandates inspections of the horizontal stabilizer actuator clutch mechanisms on affected Embraer EMB‑135/145 regional jets after reports of clutch set‑point loss that could impair pitch control. Operators with the specified actuator part numbers must follow Embraer Service Bulletin 145‑27‑0082, performing an initial check within 100 flight hours and recurring checks every 2,000 hours. Non‑compliance is legally enforceable and grounds the aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument sets a targeted inspection requirement for listed HSA part numbers and specified intervals; the text contains no indication that the AD expands or narrows that scope beyond its stated applicability and inspection regime."},"complexity_factors":["Narrow technical applicability limited to four specific HSA part numbers (Applicability).","Mandated inspections must follow an external document: Embraer Service Bulletin No. 145-27-0082 (Requirement).","Later revisions to the service bulletin require approval by the CTA, creating administrative discretion over acceptable procedures (Requirement).","Fixed compliance timing: initial inspection within 100 flight hours and recurrent inspections every ≤2000 flight hours, creating operational scheduling and downtime implications (Compliance).","Reference to previous AD (DCA AD 2001-10-02R2) introduces cross-authority traceability (Requirement note).","Effective date and delegated CSA Authority signature establish enforceability and administrative provenance (effective date / signature)."],"plain_english_summary":"This Airworthiness Directive requires operators of Embraer EMB-145 aircraft fitted with horizontal stabilizer actuators P/N 362200-1007, -1009, -1011 or -1013 to inspect clutch integrity per Embraer Service Bulletin No. 145-27-0082 or later CTA‑approved revisions. Initial inspection must occur within 100 flight hours and be repeated at intervals not exceeding 2000 flight hours. The AD follows reported losses of the stabilizer actuator set point; inspection costs, downtime and compliance decisions fall to aircraft operators, while approval of later bulletin revisions rests with the CTA."},"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-emb-145-20-horizontal-stabilizer-actuator-clutches","history":"/api/acts/ad-emb-145-20-horizontal-stabilizer-actuator-clutches/history","analysis":"/api/acts/ad-emb-145-20-horizontal-stabilizer-actuator-clutches/analysis","conflicts":"/api/acts/ad-emb-145-20-horizontal-stabilizer-actuator-clutches/conflicts","importantCases":"/api/acts/ad-emb-145-20-horizontal-stabilizer-actuator-clutches/important-cases","documents":"/api/acts/ad-emb-145-20-horizontal-stabilizer-actuator-clutches/documents"}}