{"id":"F2006L00437","name":"AD/DO 328/39 - Elevator Drain Holes","slug":"ad-do-328-39-elevator-drain-holes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":117119,"registerId":"commonwealth-F2006L00437-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 328/39 | Elevator Drain Holes | 3/2006 |\n| ------------ | -------------------- | ------ |\n\n| Applicability: | All Model 328-100 aircraft.                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with LBA AD D-2004-004.Note: Dornier 328 Service Bulletin No. SB-328-55-450 Revision 1 refers. |\n| Compliance:    | Before 31 March 2006, unless already accomplished.                                                                  |\n|                | This Airworthiness Directive becomes effective on 16 March 2006.                                                    |\n| Background:    | The manufacturer received reports of water accumulation in the elevators.                                           |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n30 January 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/39","sectionType":"part","heading":"AD/DO 328/39","content":"## AD/DO 328/39","sortOrder":1},{"sectionNumber":"Elevator Drain Holes","sectionType":"part","heading":"Elevator Drain Holes","content":"## Elevator Drain Holes","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":"No change of scope is indicated within this instrument. The AD addresses a safety concern—water accumulation in elevators—by mandating action for all Model 328‑100 aircraft to be taken in accordance with LBA AD D‑2004‑004 and Dornier Service Bulletin SB‑328‑55‑450 Rev 1, with a specified compliance deadline (Applicability; Requirement; Note; Compliance; Background)."},"complexity_factors":["Narrow applicability but mandatory: applies to all Model 328‑100 aircraft (Applicability).","Cross-reference to an external foreign directive (LBA AD D‑2004‑004) rather than prescribing technical steps directly (Requirement).","Reference to a specific manufacturer service bulletin (SB‑328‑55‑450 Revision 1) for implementation details increases dependency on another document (Requirement/Note).","Short compliance window and stated effective date create scheduling pressure for operators (Compliance: before 31 March 2006; effective 16 March 2006).","Document provides cause (water accumulation) but no technical remedy text in this instrument, shifting technical discretion to referenced documents (Background; Requirement).","Compliance imposes tangible costs on operators (labour, parts, aircraft downtime) and requires coordination with maintenance providers (implicit from Requirement and Compliance).","Regulatory provenance: signed and issued by CASA delegate, giving the instrument immediate enforceability within its scope (signature/date)."],"plain_english_summary":"This Airworthiness Directive requires operators of Dornier 328‑100 aircraft to inspect and modify elevator drain holes by following LBA AD D‑2004‑004 and the referenced Dornier Service Bulletin. The measure targets reported water accumulation in the elevators. Compliance was required by 31 March 2006 and the AD took effect on 16 March 2006. Aircraft operators bear the cost, scheduling and downtime to carry out the mandated work and must follow the prescribed technical instructions."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific technical defect in a specific aircraft model. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only one substantive requirement (comply with external German directive)","No defined terms section","No conditional logic or nested exceptions","Single applicability criterion (Model 328-100 aircraft)","Simple compliance deadline structure","Cross-reference to only two external documents (LBA AD and Service Bulletin)"],"plain_english_summary":"This CASA Airworthiness Directive compels owners/operators of Dornier 328-100 aircraft to fix water trapped inside the elevators, a condition that can freeze, add weight, or cause corrosion and impair flight control.  \n\nIt requires compliance with LBA AD D-2004-004 and SB-328-55-450 Revision 1 (likely drainage modifications). Effective 16 Mar 2006; work must be done before 31 Mar 2006 unless already completed."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-39-elevator-drain-holes","history":"/api/acts/ad-do-328-39-elevator-drain-holes/history","analysis":"/api/acts/ad-do-328-39-elevator-drain-holes/analysis","conflicts":"/api/acts/ad-do-328-39-elevator-drain-holes/conflicts","importantCases":"/api/acts/ad-do-328-39-elevator-drain-holes/important-cases","documents":"/api/acts/ad-do-328-39-elevator-drain-holes/documents"}}