{"id":"F2006L00697","name":"AD/DO 228/9 - Fuel Tank Lightning Protection","slug":"ad-do-228-9-fuel-tank-lightning-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136715,"registerId":"commonwealth-F2006L00697-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 228 Series Aeroplanes","sectionType":"division","heading":"Dornier 228 Series Aeroplanes","content":"### Dornier 228 Series Aeroplanes\n\n| AD/DO 228/9 | Fuel Tank Lightning Protection | 4/2006 |\n| ----------- | ------------------------------ | ------ |\n\n| Applicability: | Model 228-201, serial number 8164 and Model 228-212 aircraft, serial numbers 8155, and 8176 through 8220.                                                                                                                                               |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD 92-379.Note: Dornier Service Bulletin No. 228-200 refers.                                                                                                                                                              |\n| Compliance:    | Before 30 April 2006, unless already accomplished.                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 13 April 2006.                                                                                                                                                                                        |\n| Background:    | The manufacturer has determined that precautions need to be taken for special lightning protection in the area of a wing fuel tank behind the propellers. The existing thickness of panels is not sufficient protection against swept-stroke lightning. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n28 February 2006","sortOrder":0},{"sectionNumber":"AD/DO 228/9","sectionType":"part","heading":"AD/DO 228/9","content":"## AD/DO 228/9","sortOrder":1},{"sectionNumber":"Fuel Tank Lightning Protection","sectionType":"part","heading":"Fuel Tank Lightning Protection","content":"## Fuel Tank Lightning Protection","sortOrder":2},{"sectionNumber":"4/2006","sectionType":"part","heading":"4/2006","content":"## 4/2006","sortOrder":3}],"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The text specifies a narrow, serial‑numbered scope and references LBA AD 92‑379 for the required action. Nothing in this instrument indicates the scope was altered from an earlier intent or document; it applies only to the listed aircraft and requires compliance as stated."},"complexity_factors":["Narrow applicability to specific serial numbers (Applicability) — simplifies population but requires accurate asset tracking.","Cross-reference to external instrument LBA AD 92‑379 and Dornier Service Bulletin No. 228‑200 (Requirement) — operator must obtain and follow another authority for procedural and technical detail.","Technical nature of work (Background) — lightning‑protection modifications to wing fuel tanks likely need specialised maintenance skills, parts and certification, increasing operational cost and downtime.","Short compliance window (Compliance: effective 13 April 2006; comply before 30 April 2006) — compresses scheduling for operators and maintenance providers.","Regulatory mandate (AD) — imposes a legally binding obligation on affected operators, who bear the cost and decision to schedule the work."],"plain_english_summary":"Requires operators of the listed Dornier 228 serial‑number aircraft to carry out a lightning‑protection modification for wing fuel tanks in accordance with LBA AD 92‑379 (see Dornier Service Bulletin No. 228‑200). The AD is effective 13 April 2006 and sets a compliance deadline of 30 April 2006.\n\nThis affects the owners/operators of the specified aircraft, who must arrange and pay for the technical work. The manufacturer found certain wing fuel‑tank panels too thin to resist swept‑stroke lightning, so the modification addresses that specific vulnerability."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue airworthiness directive addressing a specific safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating lightning protection modifications."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 2 defined applicability criteria (specific aircraft models and serial numbers)","Single requirement referencing external document (LBA AD 92-379)","No nested conditional logic or exceptions","No cross-references to other legislation beyond the cited German AD and service bulletin","Simple compliance structure: one deadline, one alternative (already accomplished)"],"plain_english_summary":"This AD mandates modification of certain Dornier 228 aircraft to improve wing fuel-tank protection against swept‑stroke lightning, by requiring compliance with LBA AD 92‑379 and the manufacturer’s service bulletin. It applies to specific serial-numbered 228‑201/212s and matters because thin tank panels could allow lightning to ignite fuel vapours, grounding affected aircraft unless work was done by 30 April 2006."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection","history":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection/history","analysis":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection/analysis","conflicts":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection/conflicts","importantCases":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection/important-cases","documents":"/api/acts/ad-do-228-9-fuel-tank-lightning-protection/documents"}}