{"id":"F2006B10437","name":"AD/HS 125/156 - Control Cable Assemblies at Keel Subframe 15A","slug":"ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116137,"registerId":"commonwealth-F2006B10437-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/156 - Control Cable Assemblies at Keel Subframe 15A","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 125/156 Control Cable Assemblies at Keel Subframe 15A 10/96\n\nApplicability: Model BAe 125 series 1000A and 1000B, and Hawker 1000 aircraft, as listed in Hawker Service Bulletin 27-168.\n\n \n\nRequirement: Inspect in accordance with Hawker Service Bulletin 27-168.\n\n \n\nNote: FAA AD 96-11-17 Amdt 39-9641 refers.\n\n \n\nCompliance: Unless already accomplished, before 15 December 1996.\n\n \n\nBackground: Reports were received of chafing due to insufficient clearance between the flaps turnbuckle and the subframe, and between the airbrakes cable and the subframe. Eventual fraying or seizing of cables could result, and lead to restriction or possible loss of flight controls.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope remains as stated: applicability to BAe 125 series 1000A/1000B and Hawker 1000 (per Hawker Service Bulletin 27-168), a mandatory inspection requirement, and the compliance deadline of before 15 December 1996. The instrument limits itself to inspection of control cable assemblies at keel subframe 15A and does not expand obligations beyond that."},"complexity_factors":["Narrow applicability: specific aircraft models (BAe 125 series 1000A/1000B and Hawker 1000)","Single, discrete action required (inspection) rather than a sequence of technical amendments","External normative reference (Hawker Service Bulletin 27-168) determines technical detail","Fixed compliance deadline (before 15 December 1996) simplifies scheduling but concentrates workload","Safety-critical interpretation: inspection standard and acceptance criteria rely on maintenance organisation competence"],"plain_english_summary":"This airworthiness directive requires operators of BAe 125 series 1000A/1000B and Hawker 1000 aeroplanes to inspect control cable assemblies at keel subframe 15A in accordance with Hawker Service Bulletin 27-168, to be done before 15 December 1996. CASA issued the directive after reports of chafing that could lead to cable fraying, seizure or restriction/loss of flight controls. Aircraft owners/operators and maintenance organisations must carry out the inspection and bear the compliance cost within the mandated timetable."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating inspection for cable chafing at keel subframe 15A."},"complexity_factors":["Single, specific mechanical issue (cable chafing at one location)","Only one compliance action required (inspect per manufacturer bulletin)","Clear applicability limited to two specific aircraft models","Single deadline with no conditional extensions or exceptions","No defined terms section — uses standard aviation terminology","No cross-references to other legislation beyond a related FAA directive for context","Background explanation is straightforward and non-technical"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) requiring specific aircraft owners/operators to inspect and fix a dangerous mechanical problem.\n\n**Who it affects:** Owners and operators of specific British Aerospace BAe 125 series aircraft (models 1000A and 1000B) and Hawker 1000 aircraft.\n\n**What the problem is:** Control cables near the \"keel subframe 15A\" (a structural part of the aircraft's undercarriage/frame) are rubbing against metal parts due to insufficient clearance. This chafing can cause the cables to fray or seize up, potentially leading to restricted or complete loss of flight controls — a serious safety risk.\n\n**What must be done:** Aircraft must be inspected following the procedures in \"Hawker Service Bulletin 27-168\" (a technical repair guide from the manufacturer). If not already done, this inspection must be completed before 15 December 1996.\n\n**Why it matters:** Flight control cables are critical — they connect the pilot's controls to the actual wing and tail surfaces. If they fail, the pilot cannot steer, climb, or descend safely. This AD prevents potential accidents by catching wear before it becomes catastrophic."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a","history":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a/history","analysis":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a/analysis","conflicts":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a/conflicts","importantCases":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a/important-cases","documents":"/api/acts/ad-hs-125-156-control-cable-assemblies-at-keel-subframe-15a/documents"}}