{"id":"F2006B10527","name":"AD/HS 125/85 Amdt 1 - Battery Cable Chafing","slug":"ad-hs-125-85-amdt-1-battery-cable-chafing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116317,"registerId":"commonwealth-F2006B10527-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/85 Amdt 1 - Battery Cable Chafing","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBritish Aerospace BAe 125 Series Aeroplanes\n\nAD/HS 125/85\n\nAmdt 1\n\n  \nBattery Cable Chafing 3/88\n\nApplicability: BAe/HS/BH/DH-125 Series aircraft as follows:\n\nSeries 1A with modification 252606 Series 1A/S with modification 252605 Series 3A with modification 252603 Series 3A/RA with modification 252600 Series 400A with modification 252550 Series 600A with modification 252468 Series 700A - NA0201 to NA0333 inclusive Series 700B - 257001 to 257190 inclusive All series F1B, F3B, F3B/RA, F400B and F600B retrofitted with Garrett TFE 731-3 engines.\n\nRequirement: 1. (a) Isolate all electrical power and disconnect batteries.\n\n    (b) Locate and gain access to panel ZL and remove lower cover on ZL.\n\n    (c) Locate emergency contactors 1 and 2 identified L and M.\n\n    (d) Inspect the size 10 cables which run from each emergency contactor lower terminal for chafing and damage, pay particular attention to cable runs in way of the fuse block support mountings at the bottom of the panel.\n\n2. If damage is found replace affected cable.\n\nNote: British Aerospace 125 Alert Service Bulletin 24-A261 refers.\n\nCompliance: For Para’s 1 and 2: Before further flight after 13 March 1987, and thereafter at intervals not exceeding 12 months.\n\nNote: Completion of Mod. 253204A and B constitutes terminating action for repeat inspections.\n\nBackground: BAe ASB 24-A261 Rev 1 introduces a requirement for repeat inspections at intervals not exceeding 12 months until incorporation of Mod. 253204.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is an amendment (Amdt 1) to an existing Airworthiness Directive. The scope remains tightly focused on the original safety issue — battery cable chafing on specific BAe 125 aircraft. The amendment appears to update compliance requirements (introducing the terminating modification option and revised inspection intervals) without expanding beyond the original aircraft population or safety concern."},"complexity_factors":["Multiple aircraft series and sub-series with different applicability criteria (modification numbers, serial number ranges)","Technical aviation terminology requiring specialist knowledge (emergency contactors, panel ZL, size 10 cables, fuse block support mountings)","Cross-reference to external technical document (British Aerospace Alert Service Bulletin 24-A261)","Conditional compliance path: either repeat inspections every 12 months OR install terminating modification (253204A and B)","Specific procedural steps requiring mechanical access and inspection"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections of battery cables on certain British Aerospace BAe 125 series business jets because chafing can wear insulation and risk electrical failures or fire. Affected are owners/operators of specified BAe/HS/BH/DH‑125 models (including various Series and retrofitted engine types). Required actions: inspect the emergency contactor battery cables, replace any damaged cables, and repeat inspections annually — unless the permanent modification is installed, which removes the need for recurring checks."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The amendment introduces a recurring inspection regime: initial inspection before next flight after 13 March 1987 and repeat inspections at intervals not exceeding 12 months until Mod. 253204 is incorporated (Compliance; Note; Background). The change converts an inspection requirement into an ongoing obligation and identifies Mod. 253204A/B as the terminating action for those repeat inspections."},"complexity_factors":["Detailed applicability listing multiple BAe 125 sub‑series and serial ranges (Applicability).","Technical maintenance steps required: power isolation, panel access, targeted cable inspection and replacement (Requirement 1 & 2).","Recurring compliance obligation with a strict interval (before next flight after 13 Mar 1987, then ≤12 months) increases administrative tracking (Compliance).","Terminating action available only by incorporation of Mod. 253204A/B (Note), creating an investment decision for operators.","Cross‑reference to BAe Alert Service Bulletin 24‑A261 for procedural detail (Note).","Safety‑critical context raises need for qualified maintenance personnel and potential downtime/parts costs."],"plain_english_summary":"This directive requires operators of specified BAe 125 series aircraft to isolate electrical power, access panel ZL, inspect the size‑10 battery cables from emergency contactors for chafing (especially near the fuse‑block supports), and replace any damaged cable. Inspections must be done before the next flight after 13 March 1987 and then at intervals not exceeding 12 months. The stated purpose is to prevent chafing‑related electrical faults; the recurring schedule creates a clear incentive for operators to install Mod. 253204A/B to stop repeat inspections."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing","history":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing/history","analysis":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing/analysis","conflicts":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing/conflicts","importantCases":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing/important-cases","documents":"/api/acts/ad-hs-125-85-amdt-1-battery-cable-chafing/documents"}}