{"id":"F2006B09201","name":"AD/DHC-8/45 Amdt 1 - Passenger Compartment Lighting Wiring","slug":"ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53021,"registerId":"commonwealth-F2006B09201-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DHC-8/45 Amdt 1 - Passenger Compartment Lighting Wiring","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)  \nBombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes\n\nAD/DHC-8/45\n\nAmdt 1\n\n  \nPassenger Compartment Lighting Wiring 4/99\n\nApplicability: This directive is applicable to DHC-8, Models 102, 103 and 301 aeroplanes, serial numbers 002 through 010, 012 through 201, 203 through 209, 211 through 215, 217\n\nthrough 220, 222 and 223, without Modification 8/1114 (1990 Interior \\- 100 Series) or Modification 8/1110 (1990 Interior - 300 Series).\n\nRequirement: 1. Incorporate de Havilland Modification 8/2158 (Lighting \\-Passenger Compartment\n\n\\- Installation of Teflon Spiral Wrap to Wiring of Ceiling and Sidewall Lights) in accordance with Bombardier Regional Aircraft Division Dash 8 Service Bulletin 8-33-35 dated 1 September 1995.\n\n2. Inspect the lavatory lighting system wiring to determine if Teflon spiral wrap has been installed. If Teflon spiral wrap has been installed no further action is necessary, if Teflon spiral wrap is not installed, fit the spiral wrap in accordance with Bombardier Regional Aircraft Division Dash 8 Service Bulletin 8-33-35 revision B dated 25 September 1998.\n\nNote. Transport Canada Aviation AD CF-95-18 Rev 1 refers.\n\nCompliance: 1. Compliance remains unchanged as within 1000 hours time in service or six calendar months, whichever occurs first after 29 February 1996.\n\n2. Within 1000 hours time in service or six calendar months, whichever occurs first after the effective date of this amendment.\n\nThis Amendment becomes effective on 22 April 1999.\n\nBackground: Transport Canada Aviation advises that operators have reported chafing of the electrical wiring at several locations of the cabin ceiling lighting system. This chafing may lead to shorting between the wires and aircraft structure causing smoke and the risk of fire. Actions specified by the original issue of this directive were designed to decrease the likelihood of these occurrences.\n\nThis amendment is prompted by the issue of a revision to the original Canadian directive following evidence that the rework requirements may have been misinterpreted. The misinterpretation could have resulted in the lavatory wiring not being protected by Teflon spiral wrap.\n\nThe original issue of this amendment Airworthiness Directive became effective on 29 February 1996.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Yes. The amendment clarifies and extends the original requirement by explicitly requiring inspection of lavatory lighting wiring and installation of Teflon spiral wrap where it may have been omitted (see Requirement 2), and sets a new compliance deadline for that specific action (see Compliance 2). This addresses a misinterpretation risk from the original directive."},"complexity_factors":["Applicability depends on model, multiple specific serial-number ranges and absence of prior interior Modifications 8/1114 or 8/1110 (tracing aircraft status required).","Two distinct actions: incorporation of de Havilland Mod 8/2158 per Service Bulletin 8-33-35, and a separate inspect-and-retrofit step for lavatory wiring per Service Bulletin revision B.","Reliance on manufacturer service bulletins and a foreign (Transport Canada) AD for technical instructions and justification.","Different compliance triggers/timings: original action tied to a past date (remain unchanged) and the lavatory inspection/retrofit tied to this amendment's effective date.","Operational implementation requires physical access to cabin wiring, potential aircraft downtime and labour for inspection and retrofitting.","Amendment issued to correct a prior misinterpretation risk — documents and revisions must be reconciled to ensure full compliance."],"plain_english_summary":"This airworthiness directive requires operators of certain Bombardier (de Havilland) DHC‑8 Models 102, 103 and 301 (specific serial-number ranges) that do not have the listed interior modifications to fit Teflon spiral wrap to ceiling and sidewall lighting wiring and to inspect/lower‑risk lavatory lighting wiring, installing the wrap where missing. It aims to prevent wiring chafing that can cause shorting, smoke and risk of fire. Compliance deadlines are measured in flight hours or six calendar months."},"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 amendment maintains the original scope of addressing wiring chafing in passenger compartment lighting. It does not expand beyond the original safety purpose; rather, it clarifies and tightens the existing requirements to ensure lavatory wiring is also protected, correcting a potential gap caused by operator misinterpretation of the original 1996 directive."},"complexity_factors":["Single technical requirement with two distinct actions (cabin wiring and lavatory wiring)","Limited applicability criteria based on specific aircraft models, serial number ranges, and modification status","Two compliance deadlines with 'whichever occurs first' conditional logic","References to external technical documents (Service Bulletins) rather than spelling out the actual work required","No defined terms section or extensive cross-referencing within the instrument itself"],"plain_english_summary":"This AD mandates fitting Teflon spiral wrap to passenger‑cabin and lavatory lighting wiring on specified older Bombardier DHC‑8 (Dash 8) airframes that lack the 1990 interior upgrade. It addresses reported wiring chafing that can cause shorts, smoke, or fire. Amendment 1 clarifies mandatory lavatory protection after earlier misunderstanding. Main‑cabin compliance was already due (Aug 1996); lavatory work is required within 1,000 flight hours or six months after 22 Apr 1999."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring","history":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring/history","analysis":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring/analysis","conflicts":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring/conflicts","importantCases":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring/important-cases","documents":"/api/acts/ad-dhc-8-45-amdt-1-passenger-compartment-lighting-wiring/documents"}}