{"id":"F2006B02920","name":"AD/B737/223 Amdt 1 - Door Mounted Escape Slide Latch Block Assembly","slug":"ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42262,"registerId":"commonwealth-F2006B02920-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/B737/223 and issues the following AD under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nBoeing 737 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B737/223","sectionType":"part","heading":"AD/B737/223","content":"# AD/B737/223\n\nAmdt 1\n\n  \n\nDoor Mounted Escape Slide Latch Block Assembly\n\n  \n6/2004","sortOrder":1},{"sectionNumber":"DM","sectionType":"part","heading":"DM","content":"# AD/B737/223\n\nAmdt 1\n\n  \n\nDoor Mounted Escape Slide Latch Block Assembly\n\n  \n6/2004\n\n# DM","sortOrder":2}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The supplied text explicitly revokes the prior Airworthiness Directive AD/B737/223 and issues an amended AD (AD/B737/223 Amdt 1) that applies to Boeing 737 series aeroplanes and addresses the door-mounted escape slide latch block assembly (see first paragraph and headings). The excerpt does not reproduce the detailed requirement, instruction or compliance content, so the precise substantive change in technical scope relative to the prior AD cannot be determined from the provided text; only the procedural change (revocation and reissue as an amendment) is shown."},"complexity_factors":["Cross-reference to other AD sections (requirement, applicability, instructions, compliance) whose substantive content is not included in the supplied text, requiring readers to consult additional documents.","Legal delegation under subregulation 39.1(1) of CASR 1998 — authority is clear but implementation relies on administrative discretion.","Revocation and reissue of a prior AD (AD/B737/223 revoked and AD/B737/223 Amdt 1 issued) adds procedural complexity for operators tracking compliance history.","Sparse substantive detail in the supplied excerpt (no specific corrective actions, timings, or cost estimates) increases practical complexity for affected parties attempting to assess impact.","Technical subject-matter (aircraft escape slide latch block assembly) implies specialised maintenance and certification processes, which add operational complexity even though the AD text here does not set out technical steps."],"plain_english_summary":"This instrument revokes the earlier AD and issues an amended airworthiness directive for Boeing 737 series aeroplanes addressing the door‑mounted escape slide latch block assembly. A CASA delegate, under subregulation 39.1(1) of CASR 1998, mandates that operators and maintenance organisations carry out the actions, instructions and timings set out in the AD’s requirement and compliance sections. It aims to correct an unsafe condition and creates mandatory inspection/repair obligations and associated operational costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a routine amendment to a specific airworthiness directive. The scope remains tightly focused on the original safety issue (door-mounted escape slide latch block assemblies on Boeing 737 aircraft). Amendment 1 likely incorporates minor technical updates or revised compliance instructions without expanding the subject matter beyond the original unsafe condition."},"complexity_factors":["Very short document (approximately 200 words of substantive text)","Only 1 defined term implicitly referenced (the AD number itself)","No cross-references to other legislation beyond the enabling regulation (CASR 1998, subregulation 39.1(1))","Simple structure: applicability (Boeing 737), requirement (action on latch block), compliance (timing)","Single technical subject matter with no conditional exceptions or nested provisions","Standardised CASA AD format — highly templated and predictable structure"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a safety order issued by the Civil Aviation Safety Authority (CASA) that legally requires aircraft owners and operators to fix a specific safety problem.\n\n**What it does:**\n- **Revokes and replaces** an earlier safety order (AD/B737/223) with an updated version (Amendment 1)\n- **Requires action** on the **door-mounted escape slide latch block assembly** on **Boeing 737 series aircraft**\n- An escape slide is the inflatable evacuation slide that deploys from an aircraft door in an emergency. The \"latch block assembly\" is a mechanical component that helps secure this slide in place.\n\n**Who it affects:**\n- Owners and operators of Boeing 737 series aeroplanes\n- Maintenance organisations servicing these aircraft\n\n**Why it matters:**\nAirworthiness Directives are legally binding safety mandates. If the latch block assembly fails, the escape slide might not deploy properly during an emergency evacuation — potentially trapping passengers inside the aircraft. This AD ensures the unsafe condition is identified and corrected before the aircraft can fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly","history":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly/history","analysis":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly/analysis","conflicts":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly/conflicts","importantCases":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly/important-cases","documents":"/api/acts/ad-b737-223-amdt-1-door-mounted-escape-slide-latch-block-assembly/documents"}}