{"id":"F2008L02858","name":"AD/EMB-145/18 - Gust Lock Spring Cartridge","slug":"ad-emb-145-18-gust-lock-spring-cartridge","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74738,"registerId":"commonwealth-F2008L02858-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-145/18 | Gust Lock Spring Cartridge | 9/2008 |\n| ------------- | -------------------------- | ------ |\n\n| Applicability: | Embraer EMB-145( ) aircraft, either with an operational electromechanical gust lock system or with provisions for the installation of the electromechanical system, provided a gust-lock spring cartridge Part Number (P/N) KPD2611 is installed in that system.                                                                                                                                                                                                                                                                                                                                                                              |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Replace, the spring cartridge P/N KPD2611 with a new spring cartridge bearing P/N KPD4235.The detailed instructions and procedures to accomplish this AD are described in the Embraer Service Bulletins Nos. 145-27-0102, original issue,145LEG-27-0006, original issue, and 145LEG-27-0012, original issue, or later revisions approved by the CTA.Note 1: The “145LEG” series of Embraer Service Bulletins only applies to Legacy executive jets.2. No spring cartridge P/N KPD2611 is approved for installation at the electromechanical gust lock system of the aircraft.Note 2: DEPARTAMENTO DE AVIAÇÃO CIVIL AD 2003-01-03R1 refers. |\n| Compliance:    | For Requirement 1 - Within 30 days after the effective date of this AD, unless previously accomplished.For Requirement 2 - From the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |\n|                | This Airworthiness Directive becomes effective on 28 August 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n| Background:    | There have been cases of unscrewing of the spring cartridges of the electromechanical elevators gust lock system, precluding them to be unlocked on the ground, with a possibility of elevator jam if the failure occurs during flight.                                                                                                                                                                                                                                                                                                                                                                                                       |\n\n|     | This AD requires the replacement of the spring cartridge with one of a new part number. |\n| --- | --------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n17 July 2008","sortOrder":0},{"sectionNumber":"AD/EMB-145/18","sectionType":"part","heading":"AD/EMB-145/18","content":"## AD/EMB-145/18","sortOrder":1},{"sectionNumber":"Gust Lock Spring Cartridge","sectionType":"part","heading":"Gust Lock Spring Cartridge","content":"## Gust Lock Spring Cartridge","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope aligns with the stated safety purpose in the Background: it addresses unscrewing of gust‑lock spring cartridges by mandating replacement and banning the old part. It does not expand to other systems or introduce new operational restrictions beyond the replacement requirement and installation prohibition (Background; Requirement 1; Requirement 2; Compliance)."},"complexity_factors":["Targeted, single-component action (replace spring cartridge P/N KPD2611 with P/N KPD4235) reduces procedural breadth but concentrates impact on parts/supply (Requirement 1).","Short compliance window creates scheduling pressure for operators and maintenance providers (Compliance: Requirement 1 — within 30 days).","Applicability is narrow but conditional: applies only where P/N KPD2611 is installed or provisions exist for the electromechanical gust‑lock system, requiring fleet-specific checks (Applicability).","Mandatory use of specified Embraer Service Bulletins or later CTA‑approved revisions ties technical steps to manufacturer/regulator documents (Requirement 1).","Absolute prohibition on reinstalling P/N KPD2611 from the effective date may force inventory management or parts-sourcing decisions (Requirement 2; Compliance).","No express funding or compensation mechanism is stated, so operators bear direct costs and operational disruption (implicit from Requirement/Compliance).","Regulatory linkage to a prior AD is noted (DEPARTAMENTO DE AVIAÇÃO CIVIL AD 2003-01-03R1), which may require cross-referencing compliance history (Requirement 2 / Note 2).","Limited regulator discretion: later revisions of service bulletins require CTA approval, giving the authority control over acceptable procedures (Requirement 1)."],"plain_english_summary":"This Airworthiness Directive orders operators of Embraer EMB-135 and EMB-145 aeroplanes that have an electromechanical gust‑lock system fitted with spring cartridge P/N KPD2611 to replace that cartridge with P/N KPD4235. It takes effect 28 August 2008, gives a 30‑day deadline for replacement, and forbids installing P/N KPD2611 from the effective date.\n\nThe directive relies on specified Embraer Service Bulletins (or later CTA‑approved revisions) for instructions. Its stated aim is to stop cartridges unscrewing and avoid possible elevator jams; operators pay for and must schedule the work quickly and follow approved procedures."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical defect in a specific aircraft system's component. There is no evidence of scope creep; it targets exactly the safety issue identified in the background (unscrewing spring cartridges) with precisely the remedy required (part replacement)."},"complexity_factors":["Single, specific mechanical defect addressed with clear replacement instruction","Only one defined part number (KPD2611) and one replacement part (KPD4235) to track","Simple two-part requirement structure (replace existing + ban future installation)","Straightforward compliance timeline (30 days for replacement, immediate for installation ban)","Minimal cross-referencing (only to manufacturer service bulletins and one Brazilian aviation authority reference)","No nested exceptions, conditional logic, or alternative compliance methods","Short document (approximately 300 words of substantive content)"],"plain_english_summary":"This AD requires owners/operators of Embraer EMB‑135/145 jets with the specified electromechanical gust lock to replace a faulty spring cartridge (KPD2611) with the improved KPD4235 within 30 days and prohibits reinstalling the old part. It addresses springs that can unwind and jam the elevators on ground or in flight, preventing loss of pitch control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge","history":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge/history","analysis":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge/analysis","conflicts":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge/conflicts","importantCases":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge/important-cases","documents":"/api/acts/ad-emb-145-18-gust-lock-spring-cartridge/documents"}}