{"id":"F2005L01331","name":"AD/750XL/4 - Fuselage Frame at Station 384.62","slug":"ad-750xl-4-fuselage-frame-at-station-384-62","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":35093,"registerId":"commonwealth-F2005L01331-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/4 | Fuselage Frame at Station 384.62 | 7/2005 |\n| ---------- | -------------------------------- | ------ |\n\n| Applicability: | Model 750XL aircraft, serial numbers 101 through 108.                                                                                                                                                                                                                                                                                                                                                                         |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Inspect in accordance with Pacific Aerospace Corporation Mandatory Service Bulletin (MSB) PACSB/XL/010 to ensure that the correct size rivets have been used to secure the horizontal tail surface load transfer angles to the rearmost fuselage frame at Station 384.62.2. If undersized rivets are installed, replace the rivets in accordance with Section 2.B. of MSB PACSB/XL/010.Note: NZ CAA AD DCA/750XL/4 refers. |\n| Compliance:    | 1. Within 100 hours time in service after 7 July 2005, unless already accomplished.2. Within 100 hours time in service after inspection.                                                                                                                                                                                                                                                                                      |\n|                | This Airworthiness Directive becomes effective on 7 July 2005.                                                                                                                                                                                                                                                                                                                                                                |\n| Background:    | This Directive requires an inspection to detect the possible installation of undersized rivets to ensure the aircraft’s structure conforms to the type design and expected levels of strength and durability.                                                                                                                                                                                                                 |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n25 May 2005","sortOrder":0},{"sectionNumber":"AD/750XL/4","sectionType":"part","heading":"AD/750XL/4","content":"## AD/750XL/4","sortOrder":1},{"sectionNumber":"Fuselage Frame at Station 384.62","sectionType":"part","heading":"Fuselage Frame at Station 384.62","content":"## Fuselage Frame at Station 384.62","sortOrder":2},{"sectionNumber":"7/2005","sectionType":"part","heading":"7/2005","content":"## 7/2005","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD is narrowly focused on detecting and correcting undersized rivets at a specified fuselage station for a defined subset of Model 750XL aircraft. The text and requirements align with that specific safety objective and do not expand the instrument’s scope beyond inspection and corrective rivet replacement as set out in the manufacturer’s Mandatory Service Bulletin. There is no indication in the instrument that its purpose has grown beyond its original, stated safety intent."},"complexity_factors":["Single, narrow safety requirement (inspect and replace if necessary)","One external cross-reference to a single Mandatory Service Bulletin (PACSB/XL/010)","One conditional branch only (if undersized rivets found → replace)","Short compliance timetable with two deadlines (100 hours after effective date; 100 hours after inspection)","Limited applicability (only 8 serial-numbered aircraft)"],"plain_english_summary":"Owners/operators of Pacific Aerospace Model 750XL aircraft (serials 101–108) must inspect the rearmost fuselage frame at Station 384.62 for undersized rivets used on the horizontal tail load-transfer angles, within 100 hours TIS after 7 July 2005. Any undersized rivets must be replaced per Pacific Aerospace Mandatory Service Bulletin PACSB/XL/010. The work (inspection, parts, labour, downtime) is the owner’s responsibility and is monitored by regulators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive for a specific airworthiness issue on a limited fleet of aircraft. It remains precisely scoped to its original purpose: ensuring correct rivet installation on the tail section of 8 specific aircraft."},"complexity_factors":["Very short document (approximately 200 words)","Only 2 substantive requirements (inspect; repair if needed)","Single defined applicability (8 specific aircraft by serial number)","Clear compliance deadlines with simple conditional ('unless already accomplished')","No cross-references to other legislation or complex conditional logic","Refers to external technical standard (manufacturer service bulletin) but provides clear incorporation by reference"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to a specific type of small aircraft: the **Pacific Aerospace 750XL** with serial numbers 101 through 108.\n\n**What it requires:**\n- **Inspection:** Aircraft owners or operators must check whether the correct size rivets were used to attach the horizontal tail surface to the fuselage frame at a specific location (\"Station 384.62\" — an engineering reference point on the aircraft's structure).\n- **Fix if needed:** If the rivets are too small (\"undersized\"), they must be replaced following specific instructions in a manufacturer bulletin.\n\n**Why it matters:**\nIncorrect rivet size could weaken the aircraft's structure, potentially affecting safety and durability. This directive ensures these specific aircraft meet the original design standards.\n\n**When to comply:**\n- The inspection must be done within **100 hours of flying time** after 7 July 2005 (or sooner if already done).\n- If repairs are needed, they must also be completed within 100 hours of flying time after the inspection finds the problem.\n\n**Key point:** This is a **one-time inspection and potential repair** — not an ongoing recurring requirement."},"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-750xl-4-fuselage-frame-at-station-384-62","history":"/api/acts/ad-750xl-4-fuselage-frame-at-station-384-62/history","analysis":"/api/acts/ad-750xl-4-fuselage-frame-at-station-384-62/analysis","conflicts":"/api/acts/ad-750xl-4-fuselage-frame-at-station-384-62/conflicts","importantCases":"/api/acts/ad-750xl-4-fuselage-frame-at-station-384-62/important-cases","documents":"/api/acts/ad-750xl-4-fuselage-frame-at-station-384-62/documents"}}