{"id":"F2008L00206","name":"AD/DO 228/6 Amdt 1 - Horizontal Stabiliser Leading Edge and Ribs","slug":"ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":72408,"registerId":"commonwealth-F2008L00206-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 228 Series Aeroplanes","sectionType":"division","heading":"Dornier 228 Series Aeroplanes","content":"### Dornier 228 Series Aeroplanes\n\n| AD/DO 228/6 Amdt 1 | Horizontal Stabiliser Leading Edge and Ribs | 2/2008 |\n| ------------------ | ------------------------------------------- | ------ |\n\n| Applicability: | Model 228-100 and -101 aircraft, serial numbers 7003 through 7116, 7167, and 7168.Model 228-200, -201, -202, and -212 aircraft, serial numbers 8002 and subsequent.                                                                                                                                                                                                                                                                                 |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | In accordance with the Aircraft Maintenance Manual:1. Perform a visual inspection of horizontal stabiliser leading edge skin and ribs for cracks and skin security.2. Repeat the Requirement 1 inspection at the specified intervals.Repair/replace damaged components, if the inspection reveals damage beyond allowable limits.Note: LBA AD 2001-045/2 refers.                                                                                    |\n| Compliance:    | As specified in the Aircraft Maintenance Manual.                                                                                                                                                                                                                                                                                                                                                                                                    |\n|                | This Amendment becomes effective on 14 February 2008.                                                                                                                                                                                                                                                                                                                                                                                               |\n| Background:    | Reports were received of cracking around the riveted joints of the horizontal stabiliser skin and ribs, caused by corrosion and fatigue damage. Undetected cracking could result in in-flight detachment of the horizontal stabiliser skin, which could lead to loss of aircraft controllability.Amendment 1 is issued to delete reference to Aircraft Maintenance Manual (AMM) Temporary Revisions, which have now been incorporated into the AMM. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n19 December 2007","sortOrder":0},{"sectionNumber":"AD/DO 228/6 Amdt 1","sectionType":"part","heading":"AD/DO 228/6 Amdt 1","content":"## AD/DO 228/6 Amdt 1","sortOrder":1},{"sectionNumber":"Horizontal Stabiliser Leading Edge and R","sectionType":"part","heading":"Horizontal Stabiliser Leading Edge and Ribs","content":"## Horizontal Stabiliser Leading Edge and Ribs","sortOrder":2},{"sectionNumber":"2/2008","sectionType":"part","heading":"2/2008","content":"## 2/2008","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a minor amendment (Amendment 1) to an existing Airworthiness Directive. The scope remains unchanged — it continues to address the same safety issue (horizontal stabiliser cracking). The amendment only updates administrative references to maintenance manuals, removing outdated temporary revision references. No expansion of affected aircraft, inspection requirements, or safety scope."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 2 defined applicability criteria (aircraft models and serial numbers)","Single straightforward requirement with 3 sub-points (inspect, repeat, repair)","No cross-references to other legislation or complex conditional logic","Simple amendment purpose (updating manual reference only)","Clear, prescriptive safety mandate with no discretionary elements"],"plain_english_summary":"This AD requires owners/operators of certain Dornier 228 aircraft to inspect and, if necessary, repair or replace the horizontal stabiliser leading edge skin and ribs for cracking, corrosion and loose skin on affected serial-numbered airframes. It responds to fatigue and corrosion found at riveted joints that could allow stabiliser skin to detach in flight and cause loss of control; the amendment updates maintenance‑manual references to permanent revisions."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The amendment does not expand or narrow the inspection or repair obligations. It removes references to AMM Temporary Revisions that have been incorporated into the AMM; the required inspections, applicability to listed serials, and the instruction to repair/replace beyond allowable limits remain unchanged (Requirement; Background; Compliance)."},"complexity_factors":["Targeted applicability to specific models and narrow serial number ranges (Applicability) creates a limited but precise compliance population.","Substantive requirements are delegated to the Aircraft Maintenance Manual (AMM) for inspection intervals, damage limits, and repair standards (Requirement; Compliance), so legal text is brief but operational detail is externalised.","Inspections are visual and therefore partially subjective; determination of \"beyond allowable limits\" depends on AMM criteria and maintenance judgement (Requirement).","Amendment edits administrative references only (deletes AMM Temporary Revisions reference), so procedural change is small but requires operators to confirm AMM incorporation (Background).","Compliance timing and verification are set by the AMM rather than the AD, which concentrates complexity in the AMM's technical content (Compliance)."],"plain_english_summary":"Requires operators of specified Dornier 228 serial numbers to carry out recurring visual inspections of the horizontal stabiliser leading edge skin and ribs, and to repair or replace any components that exceed allowable damage, following the Aircraft Maintenance Manual. The amendment removes references to temporary AMM revisions; it responds to reported cracking from corrosion and fatigue that could cause stabiliser skin detachment and loss of controllability."}},"importantCases":[],"_links":{"self":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs","history":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs/history","analysis":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs/analysis","conflicts":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs/conflicts","importantCases":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs/important-cases","documents":"/api/acts/ad-do-228-6-amdt-1-horizontal-stabiliser-leading-edge-and-ribs/documents"}}