{"id":"F2006B03918","name":"AD/BEECH 400/16 - Aft Fuselage Fuel Drain Tube Assembly","slug":"ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43527,"registerId":"commonwealth-F2006B03918-current","compilationNumber":null,"startDate":"2026-04-02","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 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/BEECH 400/16 Aft Fuselage Fuel Drain ","sectionType":"part","heading":"AD/BEECH 400/16 Aft Fuselage Fuel Drain Tube Assembly 3/2000","content":"# AD/BEECH 400/16 Aft Fuselage Fuel Drain Tube Assembly 3/2000\n\nDM\n\nApplicability: Model 400A aeroplanes serial numbers RK-1 through RK-92 inclusive.\n\nRequirement: 1. Replace the existing aft fuselage fuel drain tube assembly, part number (P/N) 128- 920151-1 with a new, modified tube assembly, P/N 128-920237-1, in accordance with Raytheon Aircraft Service Bulletin SB.28-3076, dated October, 1997.\n\n2. A P/N 128-920151-1 must not be installed as a replacement item on an aeroplane.\n\nNote: FAA AD 99-21-08 refers.\n\nCompliance: 1. Within 200 flight hours after the effective date of this Airworthiness Directive.\n\n2. As of the effective date of this Airworthiness Directive.\n\nThis Airworthiness Directive becomes effective on 27 January 2000.\n\nBackground: Chafing of the fuel drain tube assembly by the elevator control cable has occurred which could result in fuel leakage from the fuel drain tube assembly and consequent risk of fire.\n\n![Signature: Eugene Paul Holzapfel](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 20 January 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 27 January 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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Scope remains limited to replacing a specific part on a defined set of Model 400A aeroplanes and forbidding that part's reinstallation. The AD does not broaden affected models, add inspection programs, or impose ongoing monitoring beyond the single replacement and the ban on the old part; compliance is governed by the stated 200 flight-hour window and the Raytheon service bulletin."},"complexity_factors":["Narrow applicability: single aircraft type and a fixed serial-number range (Model 400A, s/n RK-1 through RK-92).","Single mandatory corrective action: replace specified part P/N 128-920151-1 with P/N 128-920237-1.","Prohibition on reinstalling the old part as a replacement item (straightforward compliance rule).","Fixed compliance interval: within 200 flight hours from the AD effective date, requiring maintenance scheduling and record-keeping.","Dependence on external maintenance instructions: work to be done in accordance with Raytheon Aircraft Service Bulletin SB.28-3076 (service bulletin integration).","Reference to FAA AD 99-21-08 (cross-jurisdictional reference may affect interpretation or records)."],"plain_english_summary":"**What it does:** This AD requires owners/operators of Beech Model 400A aircraft serial numbers RK-1 to RK-92 to replace the aft fuselage fuel drain tube assembly P/N 128-920151-1 with the modified assembly P/N 128-920237-1 following the Raytheon service bulletin, and bans reinstalling the old part. Compliance is required within 200 flight hours of the AD’s effective date (27 Jan 2000). \n\n**Why it matters:** CASA states the change addresses chafing between the drain tube and the elevator control cable that could cause fuel leakage and fire risk."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This Airworthiness Directive maintains its original narrow scope. It addresses a specific unsafe condition (fuel tube chafing) on a specific aircraft type (Beech 400A, serials RK-1 to RK-92) with a specific mandated fix. There is no evidence of scope creep; the document remains tightly focused on the original safety issue identified."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 defined part numbers referenced","Single applicability criterion (specific aircraft model and serial number range)","Two straightforward requirements with clear compliance deadlines","No nested exceptions or conditional logic","No cross-references to other legislation (only a reference to an FAA equivalent directive for information)","Simple cause-and-effect background explanation"],"plain_english_summary":"This CASA airworthiness directive mandates replacement of the fuel drain tube on Beechcraft Model 400A serial RK-1 to RK-92 because the old tube can chafe the elevator control cable, risking fuel leaks and fire. Owners/operators must fit the new tube (P/N 128-920237-1) and, within 200 flight hours of 27 Jan 2000, remove the old tube (P/N 128-920151-1); the old part is banned from future installation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly","history":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly/history","analysis":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly/analysis","conflicts":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly/conflicts","importantCases":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly/important-cases","documents":"/api/acts/ad-beech-400-16-aft-fuselage-fuel-drain-tube-assembly/documents"}}