{"id":"F2005L03955","name":"AD/DO 328/10 - DC Power Unit 1VE Bus Bar","slug":"ad-do-328-10-dc-power-unit-1ve-bus-bar","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39820,"registerId":"commonwealth-F2005L03955-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Dornier 328 Series Aeroplanes","sectionType":"division","heading":"Dornier 328 Series Aeroplanes","content":"### Dornier 328 Series Aeroplanes\n\n| AD/DO 328/10 | DC Power Unit 1VE Bus Bar | 1/2006 |\n| ------------ | ------------------------- | ------ |\n\n| Applicability: | Model 328-100 aeroplanes equipped with an Auxiliary Power Unit (APU) (Option 490-001A) and DC Power Control Unit part number (P/N) 230GC02Y02 or 230GC02Y03 installed.                                                                                                                                                                           |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | If not previously accomplished, inspect and modify the APU bus bar installation in accordance with the Accomplishment Instructions of Dornier Service BulletinsSB-328-24-021, dated 25 November 1997.                                                                                                                                            |\n|                | Note: LBA AD 97-354 refers.                                                                                                                                                                                                                                                                                                                      |\n| Compliance:    | Within 30 days after the effective date of this Directive.                                                                                                                                                                                                                                                                                       |\n|                | This Airworthiness Directive becomes effective on 19 January 2006.                                                                                                                                                                                                                                                                               |\n| Background:    | This Directive requires the inspection of the epoxy glass mounting plate around the spacer holding the APU bus bar for signs of damage together with securing of the lower cover with a shim and checking the torque of the bus bar screw. These actions are necessary to prevent possible overheating and burning through of the bus bar plate. |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n29 November 2005","sortOrder":0},{"sectionNumber":"AD/DO 328/10","sectionType":"part","heading":"AD/DO 328/10","content":"## AD/DO 328/10","sortOrder":1},{"sectionNumber":"DC Power Unit 1VE Bus Bar","sectionType":"part","heading":"DC Power Unit 1VE Bus Bar","content":"## DC Power Unit 1VE Bus Bar","sortOrder":2},{"sectionNumber":"1/2006","sectionType":"part","heading":"1/2006","content":"## 1/2006","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific technical defect in specific aircraft configurations. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific technical requirement with clear reference to external service bulletin","Narrow applicability limited to specific aircraft model, optional equipment, and two part numbers","Simple conditional trigger ('if not previously accomplished')","Straightforward compliance deadline (30 days from effective date)","No nested definitions, cross-references to other legislation, or conditional exceptions","Background explanation provided in plain technical language"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order issued by Australia's aviation regulator (CASA) for specific aircraft.\n\n**What it does:**\nOrders owners and operators of certain Dornier 328-100 aeroplanes to inspect and fix a problem with the electrical power system. Specifically, they must check the mounting plate around a component called the \"APU bus bar\" (a heavy-duty electrical connector that distributes power from the Auxiliary Power Unit) for damage, add a small spacer (shim) to secure the cover, and check that screws are tightened to the correct specification (torque).\n\n**Who it affects:**\nOperators of Dornier 328-100 model aircraft that have:\n- An Auxiliary Power Unit (APU) — a small engine that provides power when the main engines are off\n- A specific type of DC Power Control Unit (part numbers 230GC02Y02 or 230GC02Y03)\n\n**Why it matters:**\nWithout this fix, the mounting plate could overheat and burn through, creating a fire risk and potentially causing electrical system failure. The directive gives operators 30 days from 19 January 2006 to complete the work.\n\n**Key point:** This isn't optional — compliance is legally mandatory for airworthiness certification."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD enforces a manufacturer's Service Bulletin for a narrowly defined safety issue (APU bus bar mounting plate damage and securing). It does not broaden affected aircraft types, create new ongoing obligations, or add unrelated regulatory powers. The directive implements a specific corrective action and so remains within the original, safety‑focused scope rather than growing into a different policy area."},"complexity_factors":["Short, single-purpose Airworthiness Directive (AD) — limited text and single required action","One narrow applicability condition (single aeroplane model with specific APU option and two specific DC Power Control Unit part numbers)","Single external technical reference: Dornier Service Bulletin SB-328-24-021 (25 Nov 1997) — technical detail delegated to SB","Fixed, short compliance time (30 days) — no repeating inspection intervals or staged conditions","Cross-reference to an earlier regulator AD (LBA AD 97-354) — adds a small external dependency","No multiple defined terms, few conditional branches or nested exceptions"],"plain_english_summary":"This airworthiness directive requires operators of Dornier 328‑100 aeroplanes fitted with the specified APU option and DC power control unit to inspect and, if needed, modify the APU bus bar mounting per Dornier Service Bulletin SB‑328‑24‑021, correcting mounting plate damage, securing the lower cover with a shim, and checking screw torque.  \n\nIt affects affected aircraft owners and maintenance organisations, must be done within 30 days, and prevents bus bar overheating and potential burning-through."},"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-do-328-10-dc-power-unit-1ve-bus-bar","history":"/api/acts/ad-do-328-10-dc-power-unit-1ve-bus-bar/history","analysis":"/api/acts/ad-do-328-10-dc-power-unit-1ve-bus-bar/analysis","conflicts":"/api/acts/ad-do-328-10-dc-power-unit-1ve-bus-bar/conflicts","importantCases":"/api/acts/ad-do-328-10-dc-power-unit-1ve-bus-bar/important-cases","documents":"/api/acts/ad-do-328-10-dc-power-unit-1ve-bus-bar/documents"}}