{"id":"F2006B04235","name":"AD/BEECH 90/45 - Wing Strobe Lights - Replacement","slug":"ad-beech-90-45-wing-strobe-lights-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43998,"registerId":"commonwealth-F2006B04235-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/45 - Wing Strobe Lights - Replacement","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)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/45 Wing Strobe Lights - Replacement 10/76\n\nApplicability: All models B90 and C90, S/Nos. LJ-318 thru LJ-502; E90 S/No. LW-1; that have either Hoskins P/N 30-0187-21 or Grimes P/N 30-0669-1 wing strobe lights installed.\n\n \n\nDocument: Beechcraft SI No. 0800-362.\n\n \n\nCompliance: Within 100 hours’ time in service after 29 October 1976.\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":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive focused on a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating replacement of faulty wing strobe lights on defined Beechcraft models."},"complexity_factors":["Very short document (approximately 150 words)","Only 2 defined terms implicitly used (P/N for part number, S/No for serial number)","Single, clear compliance requirement with one deadline","No cross-references to other legislation or regulations beyond the enabling Civil Aviation Regulations 1998","Simple conditional logic: applies only to specific models AND specific serial numbers AND specific part numbers","No exceptions, exemptions, or nested conditions"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998.\n\n**What it does:** It requires owners and operators of specific Beechcraft King Air aircraft to **replace certain wing strobe lights** with safer alternatives.\n\n**Who it affects:**\n- **Aircraft models:** Beechcraft B90, C90, and E90 King Air series\n- **Specific serial numbers:** B90 and C90 models with serial numbers LJ-318 through LJ-502, and E90 model with serial number LW-1\n- **Only if fitted with:** Either Hoskins part number 30-0187-21 or Grimes part number 30-0669-1 wing strobe lights\n\n**Why it matters:** The original strobe lights were apparently faulty or unsafe (the directive doesn't specify the exact defect, but ADs are typically issued for fire risks, electrical failures, or structural issues). This order ensures these potentially dangerous components are replaced before they cause accidents.\n\n**The deadline:** Aircraft operators had to complete this replacement **within 100 hours of flight time** after 29 October 1976.\n\n**How to comply:** Follow the instructions in **Beechcraft Service Instruction No. 0800-362** (the technical manual referenced in the directive)."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The AD text provided sets a specific scope (identified aircraft serial numbers and part numbers), names the service instruction to use, and fixes a compliance deadline. The document contains no indication that its scope has been altered from an earlier version or that the listed applicability, method, or compliance timing has been changed."},"complexity_factors":["Narrow, specific applicability defined by aircraft models, serial numbers and two specific part numbers (technical specificity reduces ambiguity)","References an external manufacturer service instruction (Beechcraft SI No. 0800-362) for the detailed procedure","Fixed compliance deadline expressed in flight hours and tied to a calendar date (100 hours’ time in service after 29 October 1976)","Short text with no procedural detail in the AD itself (requires consulting the referenced SI for implementation steps)"],"plain_english_summary":"This Airworthiness Directive mandates replacing specified Hoskins or Grimes wing strobe lights on listed Beechcraft 90 and 65‑90 (King Air) airframes, performed per Beechcraft Service Instruction No. 0800‑362. Affected owners/operators must complete the work within 100 hours’ time-in-service after 29 October 1976 and are responsible for arranging and funding parts and labour."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement","history":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement/history","analysis":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement/analysis","conflicts":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement/conflicts","importantCases":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement/important-cases","documents":"/api/acts/ad-beech-90-45-wing-strobe-lights-replacement/documents"}}