{"id":"F2006L00426","name":"AD/DO 328/50 - MLG Longitudinal Beam","slug":"ad-do-328-50-mlg-longitudinal-beam","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117097,"registerId":"commonwealth-F2006L00426-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 328/50 | MLG Longitudinal Beam | 3/2006 |\n| ------------ | --------------------- | ------ |\n\n| Applicability: | Model 328-100 aircraft, serial number 300.                                                                                  |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD 97-073.Note: Dornier 328 Service Bulletin No. 328-53-184 refers.                           |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                          |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                            |\n| Background:    | Cracks have been detected on the main landing gear fairing support beam, which could result in loss of part of the fairing. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/50","sectionType":"part","heading":"AD/DO 328/50","content":"## AD/DO 328/50","sortOrder":1},{"sectionNumber":"MLG Longitudinal Beam","sectionType":"part","heading":"MLG Longitudinal Beam","content":"## MLG Longitudinal Beam","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":"Based on the instrument text, the AD does not broaden scope beyond its stated purpose: it identifies one affected airframe and directs compliance with LBA AD 97-073 (and a Dornier service bulletin) to address detected cracks. It therefore maintains a narrowly targeted corrective scope rather than expanding obligations to other aircraft or issues (Applicability; Requirement; Background)."},"complexity_factors":["Very narrow applicability — a single aircraft (Applicability: Model 328-100, serial number 300) reduces administrative spread.","Dependency on external instrument — the AD mandates action “in accordance with LBA AD 97-073,” so implementers must obtain and follow that separate document (Requirement).","Reference to a manufacturer service bulletin (Dornier Service Bulletin No. 328-53-184) adds a layer of technical detail outside this text (Requirement, Note).","Short, fixed compliance window (effective 16 March 2006; compliance before 31 March 2006) creates scheduling pressure for the operator (Compliance).","Technical task omitted from the AD text — precise inspection/repair methods and acceptance criteria are in the referenced documents, raising coordination and access needs (Requirement, Note).","Clear safety trigger provided (cracks detected on MLG fairing support beam), so the operational rationale is narrow and measurable (Background)."],"plain_english_summary":"This Airworthiness Directive requires the owner/operator of Dornier 328‑100 serial number 300 to carry out the actions specified in LBA AD 97‑073 (and the referenced Dornier Service Bulletin 328‑53‑184) to inspect/repair the main landing‑gear longitudinal beam after cracks were found that could lead to loss of the fairing. It takes effect 16 March 2006 and must be complied with by 31 March 2006; the operator bears the cost and scheduling burden of completing the mandated work."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue Airworthiness Directive with narrow applicability (one aircraft). It addresses a specific safety defect as originally intended for ADs."},"complexity_factors":["Very short document (under 200 words of substantive content)","Only one defined applicability criterion (single aircraft serial number)","Single requirement referencing external technical document (LBA AD 97-073)","No conditional logic, exceptions, or nested provisions","Simple compliance deadline structure (single date)","Minimal cross-referencing (one German AD and one service bulletin)"],"plain_english_summary":"This AD is a mandatory CASA order for a single Dornier 328-100 (serial No. 300) requiring the maintenance actions specified in LBA AD 97‑073 and Dornier Service Bulletin No. 328‑53‑184. It responds to cracks found in the main landing‑gear fairing support beam, which could allow fairing break‑away and in‑flight debris or damage. Compliance was required by 31 March 2006 (unless already done)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-50-mlg-longitudinal-beam","history":"/api/acts/ad-do-328-50-mlg-longitudinal-beam/history","analysis":"/api/acts/ad-do-328-50-mlg-longitudinal-beam/analysis","conflicts":"/api/acts/ad-do-328-50-mlg-longitudinal-beam/conflicts","importantCases":"/api/acts/ad-do-328-50-mlg-longitudinal-beam/important-cases","documents":"/api/acts/ad-do-328-50-mlg-longitudinal-beam/documents"}}