{"id":"F2006B10664","name":"AD/HU 369/104 - Fuel Hose Connections","slug":"ad-hu-369-104-fuel-hose-connections","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116592,"registerId":"commonwealth-F2006B10664-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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.","sortOrder":0},{"sectionNumber":"AD/HU 369/104 Fuel Hose Connections 7/20","sectionType":"part","heading":"AD/HU 369/104 Fuel Hose Connections 7/2000","content":"# AD/HU 369/104 Fuel Hose Connections 7/2000\n\nApplicability: Model MD600N helicopter S/N RN003 to RN045.\n\nRequirement: Inspect and verify that the internal fuel hose connections have been properly installed in accordance with either Method A or Method B as detailed in the Accomplishment Instructions of MD Helicopters Service Bulletin SB 600N-025 dated July 2, 1999.\n\nNote: FAA AD 2000-04-21 Amendment 39-11604 refers.\n\nCompliance: Unless previously accomplished, within 100 hours time in service from the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 13 July 2000.\n\nBackground: The manufacturer has advised that some fuel system hoses can inadvertently be crossed during installation. This will result in fuel starvation and subsequent engine flame out despite the fuel gauge reading above 0 and the fuel low level light not illuminated.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 30 May 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 14 June 2000.","sortOrder":1}],"analysis":{"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":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in a limited fleet of helicopters. The scope remains precisely focused on the original safety concern (fuel hose misinstallation) without expansion into broader operational or maintenance requirements."},"complexity_factors":["Single, specific aircraft model and narrow serial number range (RN003-RN045)","Only one primary requirement: inspect and verify hose installation","Two alternative compliance methods permitted (Method A or Method B)","Simple time-based compliance trigger (100 hours time in service)","No nested exceptions, conditional logic, or extensive cross-referencing","Single external reference to manufacturer service bulletin and FAA AD for context only","Total length: approximately 250 words of substantive text"],"plain_english_summary":"This AD mandates owners/operators and maintenance engineers of MD600N helicopters (S/N RN003–RN045) to inspect and verify fuel hose routing was installed correctly using one of two manufacturer-approved methods. \n\nIt must be done within 100 flight hours. The check addresses a hidden failure where crossed hoses can cause fuel starvation and engine shutdown with no cockpit warning, creating a serious in‑flight safety risk."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive implements the manufacturer-identified corrective action (inspection/verification of fuel hose routing) for the specified serial-numbered fleet. It does not expand applicability beyond those serial numbers or impose additional safety measures beyond the Service Bulletin methods; therefore it does not change the original scope described in the Background and Requirement sections."},"complexity_factors":["Narrow applicability: specific model and serial range (MD600N S/N RN003–RN045)","Action depends on an external document (MD Helicopters Service Bulletin SB 600N-025)","Two alternative compliance methods (Method A or Method B) requiring judgment which to apply","Short compliance window (within 100 hours time-in-service) creating operational scheduling pressure","Potential need for corrective maintenance if inspection finds crossed hoses (parts/labour/downtime)","Regulatory cross-reference to FAA AD 2000-04-21 adds another compliance document to consider"],"plain_english_summary":"This Airworthiness Directive requires operators of MD Helicopters MD600N serial numbers RN003–RN045 to inspect and verify internal fuel hose connections according to MD Helicopters Service Bulletin SB 600N-025 (2 July 1999), using Method A or B, within 100 hours time-in-service. It addresses the manufacturer’s report that some hoses may be crossed during installation, risking fuel starvation and engine flameout. Operators bear the inspection and correction costs and must schedule maintenance downtime to comply (Applicability; Requirement; Compliance; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hu-369-104-fuel-hose-connections","history":"/api/acts/ad-hu-369-104-fuel-hose-connections/history","analysis":"/api/acts/ad-hu-369-104-fuel-hose-connections/analysis","conflicts":"/api/acts/ad-hu-369-104-fuel-hose-connections/conflicts","importantCases":"/api/acts/ad-hu-369-104-fuel-hose-connections/important-cases","documents":"/api/acts/ad-hu-369-104-fuel-hose-connections/documents"}}