{"id":"F2005L03940","name":"AD/DO 328/22 - Ground Spoiler Valve Block","slug":"ad-do-328-22-ground-spoiler-valve-block","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39784,"registerId":"commonwealth-F2005L03940-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 328 Series Aeroplanes","sectionType":"division","heading":"Dornier 328 Series Aeroplanes","content":"### Dornier 328 Series Aeroplanes\n\n| AD/DO 328/22 | Ground Spoiler Valve Block | 1/2006 |\n| ------------ | -------------------------- | ------ |\n\n| Applicability: | Dornier 328-100 aeroplanes, Serial Number: 3016, 3024, 3026, 3027, 3031, 3034, 3042, 3046, 3049, 3054, 3062, 3066, 3067, 3069, 3071, 3074, 3078, 3079, 3080, 3081, 3082, 3083, 3085, 3086, 3090, 3091, 3092, 3093, 3094 and 3095 if equipped with \"active ground spoiler\" (Option 040-001). |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless previously accomplished, replace the ground spoiler valve block with valve block P/N 1060A0000-06 in accordance with Dornier 328 Service Bulletin No.328-27-228 Revision 1 dated 18 December 1997.Note: LBA AD 1997-331/2 refers.                                                    |\n| Compliance:    | Prior to the issue of a Certificate of Airworthiness.                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 19 January 2006.                                                                                                                                                                                                                          |\n| Background:    | Failure analysis has shown elevated pressure in return lines under certain conditions can cause unwanted unlocking of the ground spoilers.                                                                                                                                                  |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n29 November 2005","sortOrder":0},{"sectionNumber":"AD/DO 328/22","sectionType":"part","heading":"AD/DO 328/22","content":"## AD/DO 328/22","sortOrder":1},{"sectionNumber":"Ground Spoiler Valve Block","sectionType":"part","heading":"Ground Spoiler Valve Block","content":"## Ground Spoiler Valve Block","sortOrder":2},{"sectionNumber":"1/2006","sectionType":"part","heading":"1/2006","content":"## 1/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety defect in specific aircraft. The scope remains precisely limited to the identified safety issue and affected aircraft population."},"complexity_factors":["Single, specific technical requirement (replace one part with one specific part number)","Limited applicability (29 specific aircraft serial numbers plus one equipment option)","Single compliance trigger (prior to Certificate of Airworthiness issuance)","No nested exceptions or conditional logic","Short document with minimal cross-referencing (only references one Service Bulletin and one German aviation authority document)","No interpretation section or defined terms"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. It applies to specific Dornier 328-100 aeroplanes (a type of regional turboprop aircraft) that have a particular optional feature called \"active ground spoiler\" installed.\n\n**What it requires:**\n- Owners or operators of the affected aircraft must **replace a specific part** — the ground spoiler valve block — with an updated version (part number 1060A0000-06).\n- This must be done following the manufacturer's official instructions (Dornier Service Bulletin 328-27-228).\n\n**Why it matters:**\n- **Safety issue:** Under certain conditions, pressure can build up in the aircraft's hydraulic return lines. This can cause the ground spoilers (panels on the wings that help slow the plane after landing) to unlock unexpectedly.\n- **Risk:** Unwanted spoiler deployment could affect aircraft control or cause damage.\n\n**When it must be done:**\n- Before the aircraft can be issued a **Certificate of Airworthiness** (the official document saying the plane is safe to fly).\n- The directive took effect on **19 January 2006**.\n\n**Who is affected:**\n- Owners and operators of 29 specific Dornier 328-100 aircraft (listed by serial numbers) that have the active ground spoiler option installed."},"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 directive does not broaden or re‑define the fleet or operational scope; it targets a specific set of serial numbers with the active ground‑spoiler option and mandates a part replacement before certification (Applicability; Requirement; Compliance)."},"complexity_factors":["Targeted applicability: applies only to listed Dornier 328‑100 serial numbers and only if fitted with Option 040‑001 (Applicability).","Specific technical action: mandatory replacement of a particular valve block with P/N 1060A0000‑06 (Requirement).","Prescriptive compliance route: work must be done in accordance with Dornier Service Bulletin No.328‑27‑228 Rev 1 (Requirement).","Hard deadline tied to certification: replacement required prior to issue of a Certificate of Airworthiness (Compliance).","Referenced foreign authority: note cross‑reference to LBA AD 1997‑331/2, adding traceability requirements (Requirement note).","Safety justification is narrowly focused on a hydraulic pressure failure mode causing unwanted spoiler unlocking (Background)."],"plain_english_summary":"Requires specific Dornier 328‑100 aeroplanes fitted with the “active ground spoiler” option to have their ground‑spoiler valve block replaced with part P/N 1060A0000‑06 (Requirement) because elevated pressure in return lines can cause unwanted unlocking of the spoilers (Background). Aircraft owners/operators must carry out the replacement per Dornier Service Bulletin No.328‑27‑228 Rev 1 before a Certificate of Airworthiness is issued (Applicability; Compliance)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-22-ground-spoiler-valve-block","history":"/api/acts/ad-do-328-22-ground-spoiler-valve-block/history","analysis":"/api/acts/ad-do-328-22-ground-spoiler-valve-block/analysis","conflicts":"/api/acts/ad-do-328-22-ground-spoiler-valve-block/conflicts","importantCases":"/api/acts/ad-do-328-22-ground-spoiler-valve-block/important-cases","documents":"/api/acts/ad-do-328-22-ground-spoiler-valve-block/documents"}}