{"id":"F2006L00422","name":"AD/DO 328/51 - Cockpit Seat Restraint System","slug":"ad-do-328-51-cockpit-seat-restraint-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117091,"registerId":"commonwealth-F2006L00422-current","compilationNumber":null,"startDate":"2026-04-03","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 328/51 | Cockpit Seat Restraint System | 3/2006 |\n| ------------ | ----------------------------- | ------ |\n\n| Applicability: | Model 328-100 aircraft, serial numbers 3053, 3054, 3066, and 3070; equipped with cockpit seat restraint systems part number 1180002-403-100 with serial numbers 0197 through 0203. |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD 97-239.Note: Dornier Service Bulletin No. 328-25-222 refers.                                                                                      |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                                                                                   |\n| Background:    | The manufacturer has determined that some delivered cockpit seat restraint systems may not meet the requirements of Technical Standard Order TSO C22g.                             |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/51","sectionType":"part","heading":"AD/DO 328/51","content":"## AD/DO 328/51","sortOrder":1},{"sectionNumber":"Cockpit Seat Restraint System","sectionType":"part","heading":"Cockpit Seat Restraint System","content":"## Cockpit Seat Restraint System","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD, as issued, applies only to the listed Dornier 328‑100 serial numbers and specified restraint serial numbers and mandates actions referenced to LBA AD 97‑239. The text contains no indication that the applicability or obligations were altered from the directive's stated scope (Applicability; Requirement; Compliance)."},"complexity_factors":["Very narrow applicability — only four aircraft serial numbers and a specific restraint P/N and S/N range (Applicability).","Requirement is a cross-reference to another regulator's AD (LBA AD 97‑239), creating a dependency on external technical instructions (Requirement).","Technical subject matter (seat restraint compliance with TSO C22g) requires certified maintenance actions or parts disposition (Background/Requirement).","Firm compliance deadline (31 March 2006) and an effective date create time pressure for operators to schedule work (Compliance/Effective date).","Small discretion for regulator or operator in the AD text — the directive prescribes actions rather than optional measures (Requirement).","Reference to a manufacturer service bulletin adds another document operators must obtain and follow (Requirement note)."],"plain_english_summary":"This Airworthiness Directive orders owners/operators of four Dornier 328‑100 aircraft (serials 3053, 3054, 3066, 3070) fitted with cockpit seat restraint systems P/N 1180002‑403‑100 (S/N 0197–0203) to carry out the corrective actions in LBA AD 97‑239 (see Dornier Service Bulletin 328‑25‑222). Compliance is required by 31 March 2006 (effective 16 March 2006). The manufacturer found some delivered restraints may not meet Technical Standard Order TSO C22g, so operators must implement the mandated work by the deadline."},"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 a targeted safety directive addressing a specific manufacturing defect in a small batch of aircraft components. The scope remains precisely limited to the four identified aircraft with the specific defective part numbers. There is no evidence of scope creep; it is a classic single-issue airworthiness directive."},"complexity_factors":["Very short document (under 200 words of substantive content)","Only 4 specific aircraft affected by serial number","Single requirement: comply with external German directive (LBA AD 97-239)","No defined terms section","No nested exceptions or conditional logic","Clear, fixed compliance deadline (31 March 2006)","Cross-reference to only two external documents (LBA AD and Service Bulletin)"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires inspection and, if necessary, repair or replacement of certain cockpit seatbelt/harness restraint systems on four Dornier 328-100 aircraft (S/N 3053, 3054, 3066, 3070) when fitted with the affected restraint part/serial numbers, because they may not meet TSO C22g safety standards.\n\nOperators must comply with LBA AD 97‑239 and Dornier Service Bulletin No. 328‑25‑222 and complete corrective action by 31 March 2006."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system","history":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system/history","analysis":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system/analysis","conflicts":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system/conflicts","importantCases":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system/important-cases","documents":"/api/acts/ad-do-328-51-cockpit-seat-restraint-system/documents"}}