{"id":"F2008L03794","name":"AD/HS 125/182 - MLG Upper Casing","slug":"ad-hs-125-182-mlg-upper-casing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75560,"registerId":"commonwealth-F2008L03794-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 125 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 125 Series Aeroplanes","content":"### British Aerospace BAe 125 Series Aeroplanes\n\n| AD/HS 125/182 | MLG Upper Casing | 13/2008 DM |\n| ------------- | ---------------- | ---------- |\n\n| Applicability: | Model BAe 125 series 800A aircraft, and Model Hawker 800XP aircraft; as identified by serial number in Hawker Beechcraft Mandatory Service Bulletin SB 32-3920, dated August 2008, or later FAA approved revision.                                                                      |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements of FAA AD 2008-21-01 Amdt 39-15685.                                                                                                                                                                                                |\n| Compliance:    | Within 30 days after 22 October 2008.                                                                                                                                                                                                                                                   |\n|                | This Airworthiness Directive becomes effective on 22 October 2008.                                                                                                                                                                                                                      |\n| Background:    | The FAA received a report indicating that certain main landing gear casings have received improper hydrogen embrittlement relief. This condition, unless detected and corrected, could result in fracture of the main landing gear casings and a collapse of the affected landing gear. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 October 2008","sortOrder":0},{"sectionNumber":"AD/HS 125/182","sectionType":"part","heading":"AD/HS 125/182","content":"## AD/HS 125/182","sortOrder":1},{"sectionNumber":"MLG Upper Casing","sectionType":"part","heading":"MLG Upper Casing","content":"## MLG Upper Casing","sortOrder":2},{"sectionNumber":"13/2008 DM","sectionType":"part","heading":"13/2008 DM","content":"## 13/2008 DM","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-issue airworthiness directive addressing a specific safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection/repair of MLG upper casings."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (aircraft models and serial numbers)","Single compliance requirement referencing external technical document (FAA AD)","No conditional logic or nested exceptions","No cross-references to other Australian legislation","Straightforward timeline (fixed date + 30 days)"],"plain_english_summary":"This AD requires owners/operators of specified BAe 125-800A and Hawker 800XP aircraft (those listed by serial number in Hawker Beechcraft SB 32-3920) to inspect and repair main landing gear upper casings for a manufacturing-induced hydrogen embrittlement defect. CASA adopts FAA AD 2008-21-01 and mandates compliance within 30 days of 22 Oct 2008 to prevent possible MLG fracture and collapse."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument adopts the FAA AD’s technical requirements without broadening or narrowing them beyond specifying the affected serial numbers via the Hawker Beechcraft service bulletin and a 30‑day compliance deadline (Applicability; Requirement; Compliance)."},"complexity_factors":["Reference to an external instrument — the directive requires action “in accordance with the technical requirements of FAA AD 2008-21-01” (Requirement), creating dependency on another document.","Applicability is tied to specific serial numbers identified in Hawker Beechcraft Mandatory Service Bulletin SB 32-3920, so determining affected fleet relies on that bulletin (Applicability).","Short, fixed compliance window: requirements must be met within 30 days after 22 October 2008 (Compliance).","Technical, safety-critical work: inspections/repairs for hydrogen embrittlement relief on main landing gear casings require specialised maintenance capability (Background).","Regulatory enforcement and effective date are immediate and time-bound: AD becomes effective 22 October 2008 (Compliance/effective)."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of certain BAe 125 series 800A and Hawker 800XP aircraft (those serial numbers listed in Hawker Beechcraft Mandatory Service Bulletin SB 32-3920) to carry out the inspections and corrective actions specified in FAA AD 2008-21-01 to address possible hydrogen embrittlement in main landing gear casings. Compliance must be completed within 30 days after 22 October 2008; aircraft owners/operators fund and arrange the work, and CASA enforces the requirement by issuing this AD."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-182-mlg-upper-casing","history":"/api/acts/ad-hs-125-182-mlg-upper-casing/history","analysis":"/api/acts/ad-hs-125-182-mlg-upper-casing/analysis","conflicts":"/api/acts/ad-hs-125-182-mlg-upper-casing/conflicts","importantCases":"/api/acts/ad-hs-125-182-mlg-upper-casing/important-cases","documents":"/api/acts/ad-hs-125-182-mlg-upper-casing/documents"}}