{"id":"F2017L00456","name":"AD/RES/20 Amdt 1 - Eon Corporation E6000 Buckle Assemblies","slug":"ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":96209,"registerId":"commonwealth-F2017L00456-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Restraint Equipment","sectionType":"part","heading":"Restraint Equipment","content":"# Restraint Equipment\n\n| AD/RES/20 Amdt 1 | Eon Corporation E6000 Buckle Assemblies | 8/2017 |\n| ---------------- | --------------------------------------- | ------ |\n\n| Applicability: | All seat belts.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect all seat belts to determine if they are marked as having been manufactured by the EON Corporation under “TSO–C22”. This includes all seat belts supplied under an airframe manufacturer’s part number.2. If the seat belt is marked as an EON Corporation seat belt manufactured under “TSO–C22”, determine if an E6000 buckle is fitted. If an E6000 buckle is fitted, remove the seat belt assembly and replace with another item approved in accordance with regulation 21.305 of CASR.3. The seat belts removed in compliance with this AD are to be destroyed or have the “TSO–C22” markings removed or totally obliterated.4. No E6000 buckle may be installed as a spare part after the effective date.Note 1: An E6000 buckle assembly has a front cover plate which is pivoted at one end and is pulled at the other end through an arc to release the latch from the buckle. The E6000 buckle assemblies can be identified by the type of catch they use. Figure 1 shows the configuration of the catch and how it is located within the buckle assembly.Note 2: FAA AD 87-04-19 refers. |\n| Compliance:    | Prior to the issue of a Certificate of Airworthiness after 4 June 1987.Inspection in accordance with AD/RES/20 satisfies the requirements of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n|                | This AD commences on 24 April 2017.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | This AD is prompted by reports of a buckle assembly that pulled apart under load and of other assemblies that could be pulled apart by manipulating the latch in the buckle. This could result in lack of restraint during either flight or crash loads.This amendment corrects reference to a superseded regulation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |\n\n![](image.002.jpeg)  \nPieter van Dijk  \nDelegate of the Civil Aviation Safety Authority\n\n19 April 2017","sortOrder":0},{"sectionNumber":"AD/RES/20 Amdt 1","sectionType":"part","heading":"AD/RES/20 Amdt 1","content":"## AD/RES/20 Amdt 1","sortOrder":1},{"sectionNumber":"Eon Corporation E6000 Buckle Assemblies","sectionType":"part","heading":"Eon Corporation E6000 Buckle Assemblies","content":"## Eon Corporation E6000 Buckle Assemblies","sortOrder":2},{"sectionNumber":"8/2017","sectionType":"part","heading":"8/2017","content":"## 8/2017","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The amendment corrects a reference to a superseded regulation but does not broaden or narrow the substantive scope: it continues to require inspection and removal/replacement of E6000 buckles on any seat belt marked TSO–C22, with disposal/marking rules and a spares prohibition (Background; Requirement; Applicability)."},"complexity_factors":["Wide applicability to \"all seat belts\", including those supplied under an airframe manufacturer’s part number (Applicability).","Identification burden: requires checking for EON \"TSO–C22\" markings and determining if an E6000 buckle is fitted (Requirement 1–2, Note 1).","Replacement must be with an item approved under regulation 21.305 of CASR — introduces approval/compliance steps for maintainers (Requirement 2).","Disposal/marking action: removed belts must be destroyed or have markings obliterated, creating logistical/disposal and recordkeeping obligations (Requirement 3).","Supply constraint: explicit ban on installing E6000 buckles as spares after the effective date affects spares inventory and procurement (Requirement 4).","Timing and overlap: compliance timing references Certificate of Airworthiness issuance and states inspection under AD/RES/20 satisfies requirements, requiring operators to reconcile multiple ADs/dates (Compliance).","Cross-reference to earlier FAA AD and correction of a superseded regulation creates traceability and interpretation needs (Note 2; Background).","Practical identification detail provided by Note 1 reduces ambiguity but still requires physical inspection skills and possible part disassembly."],"plain_english_summary":"Requires inspection of all seat belts for EON Corporation “TSO–C22” markings and, where an E6000 buckle is fitted, removal and replacement with an item approved under regulation 21.305 of CASR. Removed belts must be destroyed or have the “TSO–C22” markings obliterated, and E6000 buckles cannot be fitted as spares after the effective date. It applies to aircraft operators, owners and maintenance organisations and responds to reported buckle failures that can lead to loss of restraint."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is an amendment (Amendment 1) to an existing Airworthiness Directive. The amendment is narrow and technical — it merely corrects a reference to a superseded aviation regulation. The scope remains exactly as originally intended: addressing the specific safety defect in E6000 buckle assemblies. There is no scope creep or expansion beyond the original safety purpose."},"complexity_factors":["Single, specific technical subject matter (one buckle model from one manufacturer)","Only 4 numbered requirements with clear sequential logic","Minimal defined terms (only 'TSO–C22' and 'regulation 21.305 of CASR' referenced)","No nested exceptions or conditional sub-clauses","Short document (approximately 300 words of substantive content)","Single cross-reference to US FAA AD 87-04-19 for background context only","Clear compliance deadline and straightforward inspection/replacement protocol"],"plain_english_summary":"This CASA Airworthiness Directive orders aircraft owners, operators and maintenance organisations to inspect for EON Corporation E6000 TSO–C22 seat belt buckles, remove and replace any affected units, and render removed belts unusable (destroy or remove certification markings). It also prohibits installing these buckles as spares. The measure addresses a known failure mode where buckles can unlatch under load, risking unrestrained occupants in turbulence or crashes."}},"importantCases":[],"_links":{"self":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies","history":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies/history","analysis":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies/analysis","conflicts":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies/conflicts","importantCases":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies/important-cases","documents":"/api/acts/ad-res-20-amdt-1-eon-corporation-e6000-buckle-assemblies/documents"}}