{"id":"F2006B07234","name":"AD/SWSA226/91 Amdt 1 - Improved Wheel Well Fire Protection","slug":"ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49082,"registerId":"commonwealth-F2006B07234-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AND","sectionType":"part","heading":"AND","content":"# AND\n\n    (ii) Fairchild Aircraft Service Bulletin (SB) No. 227-26-002, incorporating the following pages:\n\n| Pages          | Date                                            |\n| -------------- | ----------------------------------------------- |\n| 1, 2, 8, and 9 | Issued: 1 March, 2000.                          |\n| 7              | Issued: 1 March, 2000, Revised: 27 June, 2000.  |\n| 3, 4, 5, and 6 | Issued: 1 March, 2000, Revised: 2 October,2000. |\n\n    For all applicable aeroplanes, except those equipped with an anti-skid/power brake system, replace each brake shuttle valve with part number (P/N) MS28767- 4 brake shuttle valve in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Fairchild Aircraft SB No. 226-26-003 Revision 4, or Fairchild Aircraft SB No. 227-26-002, as applicable.\n    For all applicable aeroplanes, install a shield over the hydraulic lines in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Fairchild Aircraft Service Bulletin No. 226-26-003 Revision 4, or Fairchild Aircraft SB No. 227-26-002, as applicable.\n\n    3. For all aeroplane models within the SA226 series, replace the rubber fuel hose with a metal device in accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Fairchild Aircraft SB No. 226-26-003 Revision 4.\n    4. No person shall install any brake shuttle valve that is not a P/N MS28767-4 brake shuttle valve or a fuel hose that is made of rubber.\n\nNote: FAA AD 2002-08-02 refers superseding FAA AD 2001-20-14.\n\nCompliance: For Requirement 1, 2 and 3: Unless already complied with in accordance with the original issue of this Directive; within 500 hours time- in-service (TIS) from the effective date of this Directive, or within 6 months from the effective date of this Directive, whichever occurs first.\n\nFor Requirement 4: From 6 March 2002, the date of original issue of this Directive. This Amendment becomes effective on 3 July 2002.","sortOrder":0}],"analysis":{"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":3,"scope_assessment":{"changed":false,"description":"This appears to be a focused amendment to an existing Airworthiness Directive. The scope remains tightly constrained to wheel well fire protection modifications for specific Fairchild aircraft models. The amendment updates reference documents (Service Bulletin revisions and page dates) and clarifies compliance timing, but does not expand beyond the original safety purpose of preventing wheel well fires."},"complexity_factors":["Multiple aircraft models covered (SA226 and SA227 series) with slightly different requirements","Cross-references to external technical documents (Fairchild Service Bulletins) which are not reproduced in full","Conditional applicability ('except those equipped with anti-skid/power brake system')","Dual compliance pathways (alternative Service Bulletins depending on aircraft model)","Different compliance dates for different requirements (Requirements 1-3 vs Requirement 4)","Technical aviation terminology requiring specialised knowledge (TIS - time-in-service, P/N - part number, SB - Service Bulletin)"],"plain_english_summary":"This AD requires targeted safety modifications to certain Fairchild SA226/SA227 aircraft to reduce wheel-well fire risk. It mandates replacing susceptible components with approved parts, installing protective hardware, and prohibiting non‑approved replacements. Owners, operators and maintenance organisations of these types must comply within the specified compliance window (about 500 flight hours or six months). The changes reduce ignition sources from hydraulic and fuel-system vulnerabilities, addressing known in-service fire hazards."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This Amendment expands and clarifies the original directive by (a) mandating a specific replacement brake shuttle valve P/N, (b) requiring shields over hydraulic lines, (c) requiring metal fuel hoses on SA226 models, and (d) prohibiting installation of non‑compliant valves or rubber fuel hoses. It ties compliance to particular Fairchild service bulletin instructions and sets a 500‑hour/6‑month compliance deadline, while excluding aircraft with anti‑skid/power brakes."},"complexity_factors":["Specific part-number mandate (P/N MS28767-4) creates a precise procurement and traceability burden","Applicability exception for aeroplanes with anti-skid/power brake systems requires fleet-level configuration checks","Cross-reference to multiple Fairchild Service Bulletins (with revisions and page-level details) creates document-control and compliance-tracking work","Prohibition on installing non-compliant items requires maintenance record checks and future procurement controls","Compliance window (500 hours TIS or 6 months) imposes scheduling pressures for operators with low utilisation","Reference to superseding FAA ADs and amendment timing increases regulatory provenance but requires alignment with external directives"],"plain_english_summary":"This amendment requires operators of applicable Fairchild SA226/227 aeroplanes to replace brake shuttle valves with a specified part number (P/N MS28767-4) except on aircraft fitted with anti‑skid/power brakes, fit shields over hydraulic lines, and replace rubber fuel hoses on SA226 aircraft with metal devices. It also bans installing non‑compliant shuttle valves or rubber fuel hoses. Operators must follow the instructions in the cited Fairchild service bulletins and comply within 500 flight hours or six months."}},"importantCases":[],"_links":{"self":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection","history":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection/history","analysis":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection/analysis","conflicts":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection/conflicts","importantCases":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection/important-cases","documents":"/api/acts/ad-swsa226-91-amdt-1-improved-wheel-well-fire-protection/documents"}}