{"id":"F2009L03096","name":"AD/JBK 117/4 Amdt 1 - Landing Gear Electrical Bonding","slug":"ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80773,"registerId":"commonwealth-F2009L03096-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Kawasaki BK 117 Series Helicopters","sectionType":"division","heading":"Kawasaki BK 117 Series Helicopters","content":"### Kawasaki BK 117 Series Helicopters\n\n| AD/JBK 117/4 Amdt 1 | Landing Gear Electrical Bonding | 9/2009 |\n| ------------------- | ------------------------------- | ------ |\n\n| Applicability: | All Kawasaki BK 117 helicopters with serial numbers 1001 to 1037 inclusive, except 1007.                                                              |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Electrical bonding of landing gear in accordance with Kawasaki Service Bulletin No. KSB-117-066.                                                   |\n|                | 2. Removal of fuel vapor return lines in accordance with Kawasaki Service Bulletin No. KSB-117-069.                                                   |\n|                | Note: JCAB AD 3374-91 refers.                                                                                                                         |\n| Compliance:    | If not already accomplished, within 50 hours time in service after the effective date of this amendment.                                              |\n|                | This Amendment becomes effective on 27 August 2009.                                                                                                   |\n| Background:    | The original issue of this AD was issued in 1991. It applied to MBB BK 117 by serial number, and referred to MBB Alert SB No. 117-90-104.             |\n|                | Amendment 1 is raised to nominate Kawasaki helicopters, Kawasaki Service Bulletins, and the JCAB Airworthiness Directive. Requirement No. 2 is added. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n15 July 2009","sortOrder":0},{"sectionNumber":"AD/JBK 117/4 Amdt 1","sectionType":"part","heading":"AD/JBK 117/4 Amdt 1","content":"## AD/JBK 117/4 Amdt 1","sortOrder":1},{"sectionNumber":"Landing Gear Electrical Bonding","sectionType":"part","heading":"Landing Gear Electrical Bonding","content":"## Landing Gear Electrical Bonding","sortOrder":2},{"sectionNumber":"9/2009","sectionType":"part","heading":"9/2009","content":"## 9/2009","sortOrder":3}],"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":3,"scope_assessment":{"changed":true,"description":"Amendment 1 modifies the original 1991 AD by explicitly nominating Kawasaki BK 117 helicopters (S/N 1001–1037 except 1007), citing Kawasaki Service Bulletins KSB-117-066 and KSB-117-069, and adding a new requirement to remove fuel vapor return lines. The 1991 AD referred to MBB BK 117 and an MBB Alert SB; Amendment 1 therefore broadens and re-specifies the affected manufacturer documentation and adds an additional mandated action."},"complexity_factors":["Serial-number-specific applicability (only S/N 1001–1037, except 1007) increases administrative checking.","Two separate mandated actions tied to two Kawasaki Service Bulletins (KSB-117-066 and KSB-117-069).","Short compliance window (50 hours time in service) requiring prompt scheduling and potential flight/time trade-offs for operators.","Reference to a foreign airworthiness directive (JCAB AD 3374-91) and an earlier 1991 AD adds traceability requirements for records and prior compliance.","Technical maintenance work (electrical bonding and fuel-vapour-line removal) requires certified maintenance facilities and parts.","Operators bear the direct costs and must update maintenance records; minimal regulatory discretion in the text about alternative methods of compliance."],"plain_english_summary":"This airworthiness directive requires Kawasaki BK 117 helicopters with serial numbers 1001–1037 (except 1007) to fit landing-gear electrical bonding and to remove fuel vapor return lines, following Kawasaki Service Bulletins KSB-117-066 and KSB-117-069. Operators must complete the work within 50 hours time in service of the amendment’s effective date (27 August 2009). The directive updates a 1991 AD by specifying Kawasaki documents and adding the fuel-line removal; costs, maintenance time and compliance scheduling fall to operators and approved maintenance organisations."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original 1991 directive applied only to MBB BK 117 helicopters and required only landing gear electrical bonding. Amendment 1 expands the scope in two ways: (1) it updates the manufacturer reference from MBB to Kawasaki with corresponding new service bulletins, and (2) it adds a second entirely new requirement (removal of fuel vapor return lines) that was not in the original directive."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements","Single interpretation issue (serial number applicability)","No nested conditional logic — simple 'if not already accomplished' trigger","No cross-references to other legislation or complex defined terms","Clear compliance deadline with straightforward calculation method"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires owners/operators of certain Kawasaki BK 117 helicopters (S/N 1001–1037, except 1007) to correct landing‑gear electrical bonding and remove fuel vapor return lines within 50 flight hours after 27 Aug 2009. It affects operators and maintenance organisations and addresses risks from electrical faults and fuel‑vapor/fire hazards; it updates an earlier MBB-era directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding","history":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding/history","analysis":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding/analysis","conflicts":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding/conflicts","importantCases":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding/important-cases","documents":"/api/acts/ad-jbk-117-4-amdt-1-landing-gear-electrical-bonding/documents"}}