{"id":"F2008L00393","name":"AD/JBK 117/28 - Central Panel Display System","slug":"ad-jbk-117-28-central-panel-display-system","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":119038,"registerId":"commonwealth-F2008L00393-current","compilationNumber":null,"startDate":"2026-04-03","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 117/28 | Central Panel Display System | 3/2008 |\n| ------------- | ---------------------------- | ------ |\n\n| Applicability: | BK117 C-2 model helicopters.                                                                                                                                                                                                                                         |\n| -------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Check wire harness and pitot/static pressure lines for chafing in accordance with Kawasaki Heavy Industries (KHI) Service Bulletin KSB-117-286 dated 11 October 2007 or later revision approved by the Japan Civil Aviation Bureau (JCAB).                        |\n|                | 2. If, as a result of the Requirement 1 check, any wire harness or pitot/static pressure lines are found to be damaged contact KHI, Product Support Group, for further instructions.                                                                                 |\n|                | 3. If wire harness and pitot/static pressure lines are not damaged, install edge protection to air distributors in accordance with KSB-117-286 later revision approved by the JCAB.                                                                                  |\n|                | Note: JCAB AD TCD-7175-2008 refers.                                                                                                                                                                                                                                  |\n| Compliance:    | For Requirement 1 - Within 50 hours time in service after the effective date of this Directive.                                                                                                                                                                      |\n|                | For Requirement 2 - Before further flight after the Requirement 1 check.                                                                                                                                                                                             |\n|                | For Requirement 3 - At the next 600 hourly periodic inspection.                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 13 March 2008.                                                                                                                                                                                                     |\n| Background:    | This Directive is issued to prevent partial lack of and/or display of erroneous data on the central panel display system due to damage/chafing to wire harnesses and pitot/static pressure lines caused by contact with cockpit ventilation system air distributors. |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n23 January 2008","sortOrder":0},{"sectionNumber":"AD/JBK 117/28","sectionType":"part","heading":"AD/JBK 117/28","content":"## AD/JBK 117/28","sortOrder":1},{"sectionNumber":"Central Panel Display System","sectionType":"part","heading":"Central Panel Display System","content":"## Central Panel Display System","sortOrder":2},{"sectionNumber":"3/2008","sectionType":"part","heading":"3/2008","content":"## 3/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"No change indicated: the Directive applies specifically to Kawasaki BK117 C‑2 helicopters and prescribes inspections and corrective/installation actions per the cited KHI Service Bulletin with set compliance times. The AD does not expand or narrow applicability beyond the stated model or alter the types of required actions."},"complexity_factors":["Conditional workflow: different obligations depending on inspection outcome (Requirement 1 → Requirement 2 or 3).","Multiple and staggered compliance times (50 hours, before further flight if damaged, next 600‑hour inspection).","Reference to external document and regulatory approval: actions are framed by KHI Service Bulletin KSB‑117‑286 or later JCAB‑approved revisions, requiring checks of revision status.","Technical inspection and modification: physical inspection for chafing and installation of edge protection require maintenance skills and parts.","Mandatory manufacturer contact if damage found (coordination/possible additional instructions and parts from KHI Product Support Group).","Narrow applicability (only BK117 C‑2) reduces scope complexity but concentrates compliance responsibility on a specific operator group.","Regulatory cross‑references (note to JCAB AD TCD‑7175‑2008) introduce potential parallel regulatory obligations."],"plain_english_summary":"This Airworthiness Directive requires operators of Kawasaki BK117 C‑2 helicopters to inspect central-panel wire harnesses and pitot/static pressure lines for chafing following KHI Service Bulletin KSB‑117‑286; if undamaged, install edge protection at the next 600‑hour inspection, and if damaged, contact the manufacturer for instructions. It targets BK117 C‑2 operators because chafing can cause partial loss or erroneous data on the central display; compliance deadlines are 50 flight hours for the initial check and immediate grounding‑until‑rectified if damage is found."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted airworthiness directive addressing a specific safety issue with a specific aircraft system. The scope remains precisely focused on preventing display system failures in BK117 C-2 helicopters through inspection and protective measures. No scope creep is evident."},"complexity_factors":["Single, clearly defined applicability (one helicopter model)","Only 3 sequential requirements with straightforward conditional logic (if damaged / if not damaged)","Simple compliance timeline with three distinct deadlines","No defined terms section or complex cross-referencing to other legislation","References only one external technical document (manufacturer's service bulletin)","Total length is approximately 250 words"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Kawasaki BK117 C‑2 helicopters to inspect cockpit wiring and pitot/static pressure lines for chafing against air vents, and to fit protective edging to prevent future wear. It aims to stop damage that can cause central display failures and unsafe flight conditions. Initial inspection is urgent; repairs must be made before further flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jbk-117-28-central-panel-display-system","history":"/api/acts/ad-jbk-117-28-central-panel-display-system/history","analysis":"/api/acts/ad-jbk-117-28-central-panel-display-system/analysis","conflicts":"/api/acts/ad-jbk-117-28-central-panel-display-system/conflicts","importantCases":"/api/acts/ad-jbk-117-28-central-panel-display-system/important-cases","documents":"/api/acts/ad-jbk-117-28-central-panel-display-system/documents"}}