{"id":"F2005L01355","name":"AD/BAe 146/35 Amdt 2 - MLG Door Hinge Bracket","slug":"ad-bae-146-35-amdt-2-mlg-door-hinge-bracket","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35159,"registerId":"commonwealth-F2005L01355-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"British Aerospace BAe 146 Series Aeropla","sectionType":"division","heading":"British Aerospace BAe 146 Series Aeroplanes","content":"### British Aerospace BAe 146 Series Aeroplanes\n\n| AD/BAe 146/35 Amdt 2 | MLG Door Hinge Bracket | 7/2005 |\n| -------------------- | ---------------------- | ------ |\n\n| Applicability: | All Model BAe 146 aircraft.All Model Avro 146-RJ aircraft.                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Action in accordance with British Aerospace Mandatory Service Bulletin 32-A119 Revision 2 or later UK CAA approved revision.Note: UK CAA AD 013-11-90 refers.                                                                                                                                                                                                                                                                              |\n| Compliance:    | As specified in the Requirement document.                                                                                                                                                                                                                                                                                                                                                                                                  |\n|                | This Amendment becomes effective on 7 July 2005.                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | Reports were received of cracked or corroded main landing gear door rear hinge bracket assemblies.Amendment 1 was issued in response to a UK CAA review of initial inspection findings with a subsequent extension of threshold to 9,000 landings. A repeat inspection requirement was also introduced.Amendment 2 is issued to update the Requirement document to Revision 2, which introduces the Avro 146-RJ aircraft to applicability. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 May 2005","sortOrder":0},{"sectionNumber":"AD/BAe 146/35 Amdt 2","sectionType":"part","heading":"AD/BAe 146/35 Amdt 2","content":"## AD/BAe 146/35 Amdt 2","sortOrder":1},{"sectionNumber":"MLG Door Hinge Bracket","sectionType":"part","heading":"MLG Door Hinge Bracket","content":"## MLG Door Hinge Bracket","sortOrder":2},{"sectionNumber":"7/2005","sectionType":"part","heading":"7/2005","content":"## 7/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 2 broadened the AD's scope relative to the original issue by updating the Requirement to Revision 2 of the service bulletin and explicitly adding Avro 146‑RJ aircraft to the applicability (Background). Earlier Amendment 1 had already altered operational scope by extending the initial inspection threshold to 9,000 landings and adding repeat inspections. The instrument therefore evolved from an initial corrective inspection requirement to a slightly broader fleet applicability and a clarified servicing reference."},"complexity_factors":["Short directive text but depends on an external document (British Aerospace Mandatory Service Bulletin 32‑A119 Rev 2), increasing practical complexity","Cross‑reference to UK CAA approval and a UK CAA AD (UK CAA AD 013‑11‑90), creating multi‑jurisdictional references","Conditional language allowing later UK CAA‑approved revisions ('or later UK CAA approved revision') requires ongoing tracking of approved revisions","Operational complexity from inspection thresholds and repeat inspections (introduced in earlier amendment) though the AD does not itself state numeric thresholds","Applicability broadened to include two overlapping model groups (BAe 146 and Avro 146‑RJ), requiring operators to check fleet lists","Enforcement and compliance depend on interpretation of the service bulletin by maintenance organisations (technical detail outsourced)"],"plain_english_summary":"This airworthiness directive requires operators of BAe 146 and Avro 146‑RJ aeroplanes to carry out the inspections and any follow‑on work specified in British Aerospace Mandatory Service Bulletin 32‑A119 Revision 2 (UK CAA‑approved) to detect and remedy cracked or corroded main‑landing‑gear door rear hinge brackets. It took effect 7 July 2005; operators fund and schedule the inspections/repairs, which the regulator enforces to reduce hinge‑bracket failure risk."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original directive (AD/BAe 146/35) applied only to BAe 146 aircraft. Amendment 2 explicitly expands the scope to include the Avro 146-RJ aircraft variant, which shares the same landing gear door hinge bracket design. This represents a modest expansion of coverage to address the same safety issue across the broader aircraft family."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 2 defined applicability categories (BAe 146 and Avro 146-RJ)","Single primary requirement referencing an external technical document (the Service Bulletin)","No nested conditional logic or exceptions within the instrument itself","No internal cross-references to other legislation or regulations","Straightforward compliance mechanism (follow the external technical standard)","Background section provides clear rationale without legal complexity"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a safety order issued by Australia's aviation regulator (CASA) that requires specific maintenance actions on certain aircraft.\n\n**What it does:**\n- Requires owners and operators of **BAe 146 and Avro 146-RJ aircraft** to inspect and fix a specific safety problem: **cracked or corroded main landing gear (MLG) door hinge brackets**.\n- The work must follow a technical document called **British Aerospace Mandatory Service Bulletin 32-A119 Revision 2** (or a later approved version).\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains **BAe 146** or **Avro 146-RJ** aircraft in Australia.\n- This includes airlines, freight operators, and maintenance organisations.\n\n**Why it matters:**\n- Cracked or corroded landing gear components can lead to **structural failure**, potentially causing the landing gear door to detach or malfunction during flight or landing — a serious safety risk.\n- This is the **second update** to the original directive. Amendment 1 extended inspection timelines based on real-world data. Amendment 2 now also covers the **Avro 146-RJ** variant (a newer version of the same aircraft family) and updates the technical reference document to its latest revision.\n\n**Key dates:**\n- The directive became effective on **7 July 2005**.\n- Compliance timing depends on the specific requirements in the referenced Service Bulletin (typically based on flight cycles/landings)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket","history":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket/history","analysis":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket/analysis","conflicts":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket/conflicts","importantCases":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket/important-cases","documents":"/api/acts/ad-bae-146-35-amdt-2-mlg-door-hinge-bracket/documents"}}