{"id":"F2006B10872","name":"AD/JBK 117/4 - Landing Gear Electrical Bonding","slug":"ad-jbk-117-4-landing-gear-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56376,"registerId":"commonwealth-F2006B10872-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JBK 117/4 - Landing Gear Electrical Bonding","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)  Kawasaki BK 117 Series Helicopters\n\n \n\nAD/BK 117/4 Landing Gear Electrical Bonding 12/91\n\nApplicability: All MBB-BK 117 aircraft serial No 7001 through 7261 inclusive. Requirement:  Action in accordance with MBB Alert SB 117 -90-104.\n\nCompliance: Within 50 hours time in service after 12 December 1991.\n\n \n\nBackground: The existing bonding of the landing gear to the helicopter has been determined by the manufacturer to be inadequate to ensure satisfactory elimination of electrostatic charges.\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\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2138},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope. It addresses a specific identified safety defect (inadequate electrostatic bonding) in a specific aircraft model series without expansion into broader operational or maintenance requirements."},"complexity_factors":["Single, unambiguous safety requirement","Clear applicability limited to specific serial number range (7001-7261)","Simple compliance deadline (50 hours time in service)","No exceptions, nested conditions, or discretionary provisions","Minimal cross-referencing (single external manufacturer service bulletin)"],"plain_english_summary":"**What this does:** This is a safety order requiring operators of specific BK 117 helicopters to fix an electrical defect in the landing gear.\n\n**The problem:** The landing gear isn't properly electrically connected (\"bonded\") to the helicopter's airframe. This means static electricity can build up instead of safely discharging, creating a fire or spark hazard during landing or refueling.\n\n**Who is affected:** Owners and operators of MBB-BK 117 helicopters with serial numbers 7001 through 7261 inclusive.\n\n**What must be done:** Follow the manufacturer's repair instructions (MBB Alert Service Bulletin 117-90-104) to improve the electrical bonding.\n\n**When:** Within 50 hours of flying time after 12 December 1991."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding","history":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding/history","analysis":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding/analysis","conflicts":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding/conflicts","importantCases":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding/important-cases","documents":"/api/acts/ad-jbk-117-4-landing-gear-electrical-bonding/documents"}}