{"id":"F2005L01329","name":"AD/750XL/2 - Electrical Wiring Modification","slug":"ad-750xl-2-electrical-wiring-modification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35087,"registerId":"commonwealth-F2005L01329-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pacific Aerospace 750XL Series Aeroplane","sectionType":"division","heading":"Pacific Aerospace 750XL Series Aeroplanes","content":"### Pacific Aerospace 750XL Series Aeroplanes\n\n| AD/750XL/2 | Electrical Wiring Modification | 7/2005 |\n| ---------- | ------------------------------ | ------ |\n\n| Applicability: | Model 750XL aeroplanes serial numbers 101 through 107 inclusive.                                                                                                                                                         |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | If not previously accomplished, modify the electrical wiring in accordance with Pacific Aerospace Corporation Service Bulletin PACSB/XL/008 dated 8 July 2004.Note: CAA(NZ) AD DCA/750XL/2 refers.                       |\n| Compliance:    | Within 100 hours time in service after the effective date of this Directive.                                                                                                                                             |\n|                | This Airworthiness Directive becomes effective on 7 July 2005.                                                                                                                                                           |\n| Background:    | The aircraft manufacturer has revised the over-current protection for the pitot heat warning light sensor and the avionic stack cooling fan system. This is designed to prevent arcing or fire in the electrical wiring. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n19 May 2005","sortOrder":0},{"sectionNumber":"AD/750XL/2","sectionType":"part","heading":"AD/750XL/2","content":"## AD/750XL/2","sortOrder":1},{"sectionNumber":"Electrical Wiring Modification","sectionType":"part","heading":"Electrical Wiring Modification","content":"## Electrical Wiring Modification","sortOrder":2},{"sectionNumber":"7/2005","sectionType":"part","heading":"7/2005","content":"## 7/2005","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, targeted Airworthiness Directive addressing a specific safety defect in a limited fleet of aircraft. The scope remains precisely limited to the identified wiring issue in the seven affected serial numbers, consistent with the original purpose of ADs."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly used ('time in service' — standard aviation term for flight hours)","Single, unambiguous requirement with clear compliance deadline","No cross-references to other legislation or complex conditional logic","Simple applicability test (serial number range 101-107)","Single exception noted ('If not previously accomplished')","No nested exceptions or layered conditions"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's aviation regulator (CASA). It requires owners or operators of specific Pacific Aerospace 750XL aeroplanes to modify their electrical wiring.\n\n**Who it affects:**\n- Owners and operators of **Pacific Aerospace 750XL model aeroplanes** with **serial numbers 101 through 107** (seven specific aircraft)\n\n**What it requires:**\n- If the wiring hasn't already been fixed, they must modify the electrical wiring following the manufacturer's instructions in **Service Bulletin PACSB/XL/008** (dated 8 July 2004)\n- This must be done **within 100 hours of flying time** after 7 July 2005\n\n**Why it matters:**\n- The manufacturer discovered a safety flaw in the electrical system — specifically, the **over-current protection** (a safety switch that cuts power if too much electricity flows) was inadequate for two components: the **pitot heat warning light sensor** (which warns if the device that measures airspeed is getting warm) and the **avionic stack cooling fan** (which keeps the electronics from overheating)\n- Without this fix, there's a risk of **electrical arcing** (sparks jumping between wires) or **fire** in the wiring\n\n**Key point:** This is a **safety-critical compliance requirement**. Flying these specific aircraft without making this modification would violate aviation law."},"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"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Scope remains targeted to Pacific Aerospace 750XL aeroplanes serial numbers 101–107 and requires wiring modification per Service Bulletin PACSB/XL/008 to revise over-current protection for the pitot heat warning light sensor and the avionics stack cooling fan. The text does not broaden or narrow the set of affected aircraft or the required action beyond that specification."},"complexity_factors":["Technical electrical work: rewiring and revised over-current protection (Requirement referencing PACSB/XL/008).","Reference dependency: mandatory compliance with an external Service Bulletin (PACSB/XL/008 dated 8 July 2004).","Limited applicability: only affects serial numbers 101–107 (Applicability).","Time pressure: fixed 100 flight-hour compliance window from the Directive’s effective date (Compliance).","Operational impact: potential grounding risk and direct maintenance costs for owners/operators if not completed (Background/Requirement)."],"plain_english_summary":"This Airworthiness Directive requires modification of electrical wiring on Pacific Aerospace 750XL aeroplanes serial numbers 101–107 to revise over-current protection for the pitot heat warning light sensor and the avionics stack cooling fan, following Service Bulletin PACSB/XL/008 (8 July 2004). The work must be completed within 100 flight hours of the Directive’s effective date (7 July 2005).\n\nOwners/operators pay and arrange the work; the Civil Aviation Safety Authority mandates completion. The modification imposes maintenance cost and potential grounding if omitted."}},"importantCases":[],"_links":{"self":"/api/acts/ad-750xl-2-electrical-wiring-modification","history":"/api/acts/ad-750xl-2-electrical-wiring-modification/history","analysis":"/api/acts/ad-750xl-2-electrical-wiring-modification/analysis","conflicts":"/api/acts/ad-750xl-2-electrical-wiring-modification/conflicts","importantCases":"/api/acts/ad-750xl-2-electrical-wiring-modification/important-cases","documents":"/api/acts/ad-750xl-2-electrical-wiring-modification/documents"}}