{"id":"F2006L01028","name":"AD/DO 328/57 - Uncommanded Flap Retraction","slug":"ad-do-328-57-uncommanded-flap-retraction","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58305,"registerId":"commonwealth-F2006L01028-current","compilationNumber":null,"startDate":"2026-04-02","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 328/57 | Uncommanded Flap Retraction | 5/2006 |\n| ------------ | --------------------------- | ------ |\n\n| Applicability: | Dornier 328-100 aeroplanes serial number 3005 up to 3119, excluding 3100 and 3109.                                                                                                                                                                                                                                                  |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Install a locking collar and locking sleeve at the actuator cylinder in accordance with Dornier 328 Service Bulletin No. SB-328-27-293 dated 10 November 1999 or later LBA approved revision.Note 1: The actuator part number is changed from 1048A0000-02 to 1048A0000-04 after the modification.Note 2: LBA AD 1998-359/3 refers. |\n| Compliance:    | Within 30 days from the effective date of this AD, unless previously accomplished.                                                                                                                                                                                                                                                  |\n|                | This Airworthiness Directive becomes effective on 11 May 2006.                                                                                                                                                                                                                                                                      |\n| Background:    | This modification is to prevent flap drift out of the zero position when the flap actuator is not supplied with hydraulic pressure.                                                                                                                                                                                                 |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n17 March 2006","sortOrder":0},{"sectionNumber":"AD/DO 328/57","sectionType":"part","heading":"AD/DO 328/57","content":"## AD/DO 328/57","sortOrder":1},{"sectionNumber":"Uncommanded Flap Retraction","sectionType":"part","heading":"Uncommanded Flap Retraction","content":"## Uncommanded Flap Retraction","sortOrder":2},{"sectionNumber":"5/2006","sectionType":"part","heading":"5/2006","content":"## 5/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive's stated requirement and applicability align with its expressed purpose (preventing flap drift). The text provides no indication that the scope was narrowed or expanded beyond that stated applicability and required modification."},"complexity_factors":["Narrow, serial-numbered applicability (Applicability)","Single, specific hardware modification required (Requirement: install locking collar and sleeve per SB‑328‑27‑293)","Short compliance window (30 days) creating scheduling pressure (Compliance)","Dependence on an external technical document and regulator sign-off (service bulletin or later LBA‑approved revision) (Requirement)","Part-number change noted after modification (Requirement Note 1)","Exclusion of two serial numbers within the range (Applicability)","Cross-reference to another AD (LBA AD 1998-359/3) which may affect interpretation (Requirement Note 2)"],"plain_english_summary":"This directive orders owners/operators of certain Dornier 328‑100 aircraft (serials 3005–3119, excluding 3100 and 3109) to install a locking collar and sleeve on the flap actuator per Dornier Service Bulletin SB‑328‑27‑293 (or a later LBA‑approved revision). The work must be done within 30 days of the directive taking effect (11 May 2006) to prevent flaps drifting from the zero position when hydraulic pressure is absent. The operator bears the compliance cost and must follow the cited service document and any LBA approvals."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific mechanical safety issue. It has not expanded beyond its original purpose of preventing uncommanded flap movement."},"complexity_factors":["Single, specific mechanical modification required","Clear applicability criteria (specific serial number range with two exclusions)","Single compliance pathway (one service bulletin reference)","No nested exceptions or conditional logic","Short document with minimal defined terms","Two brief notes clarifying part number change and related German authority reference"],"plain_english_summary":"This AD requires owners/operators of Dornier 328‑100 aeroplanes (serials 3005–3119, excluding 3100 and 3109) to install a locking collar and locking sleeve on the flap actuator cylinder within 30 days to prevent flap drift when hydraulic pressure is lost. Comply using Dornier Service Bulletin SB‑328‑27‑293 (10 Nov 1999 or later approved)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-328-57-uncommanded-flap-retraction","history":"/api/acts/ad-do-328-57-uncommanded-flap-retraction/history","analysis":"/api/acts/ad-do-328-57-uncommanded-flap-retraction/analysis","conflicts":"/api/acts/ad-do-328-57-uncommanded-flap-retraction/conflicts","importantCases":"/api/acts/ad-do-328-57-uncommanded-flap-retraction/important-cases","documents":"/api/acts/ad-do-328-57-uncommanded-flap-retraction/documents"}}