{"id":"F2006B10400","name":"AD/HS 125/121 Amdt 1 - Fuel Feed Pipe Joints","slug":"ad-hs-125-121-amdt-1-fuel-feed-pipe-joints","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116063,"registerId":"commonwealth-F2006B10400-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/121 Amdt 1 - Fuel Feed Pipe Joints","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  British Aerospace BAe 125 Series Aeroplanes\n\n \n\nAD/HS 125/121\n\nAmdt 1\n\n\nFuel Feed Pipe Joints 5/92\n\n \n\nApplicability: All series 125 up to and including 600 series, all 800A & B series pre-mod 253180D, 700A & B series pre-mod 253180D (pre-mod 252545 & post-mod 252545) and F600A & B series pre-mod 253180D.\n\n \n\nRequirement: Action in accordance with BAe SB 28-86 or 28-87, as applicable.\n\n \n\nNote: Compliance with both SBs has been classified mandatory by the UK CAA.\n\n \n\nCompliance: 1. SB 28-86. Prior to 31 December 1991.\n\n \n\n2. SB 28-87. Prior to 30 June 1992.\n\n \n\nBackground: Misalignment of the fuel pipe at the joint coupling could result in a fuel leakage problem. This amendment is raised to add all HS125, up to and including 600 series aircraft, to this directive.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":855},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"This amendment expands the directive's scope to include 'all HS125, up to and including 600 series aircraft' in addition to the aircraft originally covered."},"complexity_factors":["Single-issue directive with narrow, clearly defined applicability","Only two compliance actions required (reference to SB 28-86 or SB 28-87)","No nested conditions or cross-references to other legislation","Short document with minimal defined terms"],"plain_english_summary":"**What this is:** An Airworthiness Directive (mandatory safety order) for specific British Aerospace BAe 125 aircraft.\n\n**Who it affects:** Owners and operators of BAe 125 series aircraft up to and including the 600 series, plus certain 800A/B, 700A/B, and F600A/B models that haven't had a specific modification (253180D) installed.\n\n**What it requires:** Aircraft must be inspected and repaired according to manufacturer Service Bulletin 28-86 or 28-87 (depending on the specific aircraft) to prevent fuel leaks.\n\n**Why it matters:** Misaligned fuel pipe joints could leak fuel, creating fire hazards. The UK aviation safety regulator has classified these service bulletins as mandatory.\n\n**Deadlines:** \n- SB 28-86: Before 31 December 1991\n- SB 28-87: Before 30 June 1992\n\n**What's new in this amendment:** The directive now covers all HS 125 aircraft up to and including the 600 series, expanding the original scope."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints","history":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints/history","analysis":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints/analysis","conflicts":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints/conflicts","importantCases":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints/important-cases","documents":"/api/acts/ad-hs-125-121-amdt-1-fuel-feed-pipe-joints/documents"}}