{"id":"F2006B08967","name":"AD/DHA-3/1 - Electrical Installation - Modification","slug":"ad-dha-3-1-electrical-installation-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52553,"registerId":"commonwealth-F2006B08967-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHA-3/1 - Electrical Installation - Modification","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)  \nDHA-3 (Drover) Series Aeroplanes\n\nAD/DHA-3/1 Electrical Installation \\- Modification 9/51\n\nApplicability: All models.\n\nRequirement: Modify the electrical installation in accordance with the following:\n\n| Circuit        | Remove               | Install                                                                                                                  | Fuse Chart Amendment                                                                          |\n| -------------- | -------------------- | ------------------------------------------------------------------------------------------------------------------------ | --------------------------------------------------------------------------------------------- |\n| Landing Lights | 10 Amp. Type S Fuses | 15 Amp. Type S fuses in circuit and also spares                                                                          | Delete “10 Amp.”Insert “15 Amp.”                                                              |\n| Generators     | 20 Amp. Type S Fuses | Two Type 5AG fuses boxes and Two 25 Amp. Type 5AG fuses. Connect in places of original Type S fuses. Install spare fuses | Delete “Generators 20 Amp.” From original Fuse Box. Identify new fuse box “Generator 25 Amp.” |\n\nor ANO 105.1.14.14.5.1\n\nCompliance: Forthwith.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The directive changes the existing electrical installation requirements by increasing fuse ratings for landing lights and generators, adding new generator fuse boxes (Type 5AG 25A) and requiring spare fuses and a fuse‑chart amendment. That alters both hardware and documentation obligations compared with the prior installation state described in the original fuse chart."},"complexity_factors":["Technical specificity of parts: precise fuse types and ratings required (Type S 10A→15A; Type 5AG 25A) increases procurement precision.","Physical hardware changes: installation of two new fuse boxes and replacement of existing fuses requires certified maintenance and possible wiring work.","Documentation update: mandated amendment of the aircraft fuse chart and identification of the new generator fuse box.","Immediate compliance: \"Forthwith\" creates scheduling pressure for operators and maintenance facilities.","Applicability to all models: broad scope increases the number of affected aircraft and spare‑parts inventory changes.","Low regulatory discretion: the AD prescribes specific components and actions rather than optional measures."],"plain_english_summary":"This airworthiness directive requires owners/operators of DHA-3 (Drover) aeroplanes to modify the aircraft electrical installation immediately: replace landing‑light fuses (10A Type S → 15A Type S), replace generator fuses and boxes (20A Type S → two 25A Type 5AG with new fuse boxes), fit spare fuses and amend the aircraft fuse chart. The Civil Aviation Safety Authority requires compliance forthwith, so operators must schedule certified electrical work, buy specified parts, and update maintenance documentation."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a narrow, targeted safety directive focused specifically on electrical fuse upgrades for one aircraft type. It has not expanded beyond its original technical safety purpose."},"complexity_factors":["Very short document (under 200 words)","Only 2 specific technical modifications required","No defined terms section","No cross-references to other legislation (except optional alternative compliance via ANO 105.1.14.14.5.1)","Simple table format with clear 'remove/install' instructions","Single applicability clause with no exceptions or conditions"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) issued by the Civil Aviation Safety Authority for **DHA-3 Drover aircraft** — a type of small Australian-made aeroplane from the 1950s.\n\n**What it does:**\nIt requires owners and operators to **upgrade the electrical fuses** in two specific circuits:\n- **Landing lights:** Replace 10 amp fuses with 15 amp fuses\n- **Generators:** Replace 20 amp fuses with 25 amp fuses in new fuse boxes\n\n**Who it affects:**\nAnyone who owns or operates any model of DHA-3 Drover aircraft.\n\n**Why it matters:**\nThe original fuses were apparently **underrated for the electrical load** — meaning they could blow unnecessarily or, worse, create safety risks if the system was overloaded. This modification prevents electrical failures that could affect critical systems during flight.\n\n**When to comply:**\nImmediately (\"Forthwith\")."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-dha-3-1-electrical-installation-modification","history":"/api/acts/ad-dha-3-1-electrical-installation-modification/history","analysis":"/api/acts/ad-dha-3-1-electrical-installation-modification/analysis","conflicts":"/api/acts/ad-dha-3-1-electrical-installation-modification/conflicts","importantCases":"/api/acts/ad-dha-3-1-electrical-installation-modification/important-cases","documents":"/api/acts/ad-dha-3-1-electrical-installation-modification/documents"}}