{"id":"F2005L03959","name":"AD/DO 328/6 - Engine Control Cable Heating Tubes","slug":"ad-do-328-6-engine-control-cable-heating-tubes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":39829,"registerId":"commonwealth-F2005L03959-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 328/6 | Engine Control Cable Heating Tubes | 1/2006 |\n| ----------- | ---------------------------------- | ------ |\n\n| Applicability: | Dornier 328-100 aeroplanes, serial numbers 3005 through 3111 inclusive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. Unless previously accomplished, install heating tubes on the control cables in the cockpit.2. Unless previously accomplished, install heating tubes on the control cables in the LH and RH engine balcony.Carry out the above requirements in accordance with Dornier 328 Service Bulletin No. SB-328-76-254 Revision 2 dated 29 November 1999 and Dornier 328SB-328-76-267 Revision 3 dated 28 October 1999 or later LBA approved revisions.Note 1: The LBA has added the check intervals for the heaters to the Certification Maintenance Requirements Document and the life limit for the heaters are added to the Airworthiness Limitations Document.Note 2: LBA AD 1997-148/7 refers. |\n| Compliance:    | Within 30 days after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n|                | This Airworthiness Directive becomes effective on 19 January 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |\n| Background:    | Ice build-up on the engine control push pull cables can cause friction or jamming of the engine controls. This AD requires the installation of heating tubes to the engine control cables.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n29 November 2005","sortOrder":0},{"sectionNumber":"AD/DO 328/6","sectionType":"part","heading":"AD/DO 328/6","content":"## AD/DO 328/6","sortOrder":1},{"sectionNumber":"Engine Control Cable Heating Tubes","sectionType":"part","heading":"Engine Control Cable Heating Tubes","content":"## Engine Control Cable Heating Tubes","sortOrder":2},{"sectionNumber":"1/2006","sectionType":"part","heading":"1/2006","content":"## 1/2006","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD stays within its original safety-focused purpose: prevent ice-induced friction or jamming of engine control cables by requiring heating-tube installation. The only extension is that the LBA has added maintenance intervals (to the Certification Maintenance Requirements) and a life limit (to the Airworthiness Limitations Document), which expands the directive from a one-off retrofit into an ongoing maintenance obligation. That expansion is consistent with the AD's safety objective and does not materially change the law's overall scope beyond its original intent."},"complexity_factors":["Short, single-issue AD focused on retrofit installation (low structural complexity)","Applicability limited to a specific serial-number range (3005–3111)","Two discrete installation tasks (cockpit cables; LH and RH engine balcony cables)","Reference to two Dornier Service Bulletins and requirement that later revisions be LBA-approved (cross-reference adds modest complexity)","Notes adding maintenance intervals (CMR) and life limits (ALD) introduce ongoing obligations beyond the one-off install","30‑day compliance deadline creates a tight, unconditional time window","Cross-reference to a prior LBA AD (1997-148/7) but no extensive nested exceptions or conditional branches","No definitions section, financial estimates, or complicated conditional language"],"plain_english_summary":"Dornier 328-100 aeroplanes (serials 3005–3111) must have heating tubes fitted to cockpit and engine-control cables within 30 days to prevent ice build-up that could cause friction or jamming of engine controls. Operators fund and arrange the work per Dornier service bulletins or LBA‑approved revisions; heater checks and life limits are added to CMR/ALD. This is an immediate safety retrofit with short lead time, added cost, and ongoing maintenance obligations."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific technical safety issue (ice on control cables) for a limited fleet of aircraft. The scope remains tightly focused on the original safety purpose with no evidence of scope creep."},"complexity_factors":["Very short document (approximately 250 words)","Only 2 substantive requirements with clear locations specified","Single compliance deadline with no conditional exceptions","Minimal defined terms (only standard aviation acronyms: AD, LBA, LH/RH, SB)","No cross-references to other legislation — only references to manufacturer service bulletins and a related German AD","Straightforward cause-and-effect: ice buildup → jamming → heating solution"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's aviation regulator (CASA). It applies to specific **Dornier 328-100 aircraft** (serial numbers 3005 to 3111).\n\n**What it does:**\n- Requires aircraft owners/operators to **install heating tubes** around engine control cables in two locations:\n  - Inside the cockpit\n  - In the left and right engine \"balconies\" (the areas where engine controls run)\n\n**Why it matters:**\n- **Ice can build up on control cables** in cold conditions, causing them to stick or jam. This could prevent pilots from properly controlling engine power — a serious flight safety risk.\n- The heating tubes prevent ice formation, keeping the controls moving freely.\n\n**Key details:**\n- The work must follow specific **Dornier service bulletins** (technical instructions from the manufacturer)\n- Compliance deadline: **30 days** after the directive takes effect (19 January 2006)\n- The German aviation authority (LBA) has also added maintenance checks and lifespan limits for these heaters to the aircraft's official maintenance documents\n\n**Who must comply:**\n- Owners and operators of the affected Dornier 328-100 aircraft\n- Maintenance organisations servicing these aircraft"},"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-328-6-engine-control-cable-heating-tubes","history":"/api/acts/ad-do-328-6-engine-control-cable-heating-tubes/history","analysis":"/api/acts/ad-do-328-6-engine-control-cable-heating-tubes/analysis","conflicts":"/api/acts/ad-do-328-6-engine-control-cable-heating-tubes/conflicts","importantCases":"/api/acts/ad-do-328-6-engine-control-cable-heating-tubes/important-cases","documents":"/api/acts/ad-do-328-6-engine-control-cable-heating-tubes/documents"}}