{"id":"F2006B05235","name":"AD/CESSNA 206/30 Amdt 1 - Alternator Ground Strap","slug":"ad-cessna-206-30-amdt-1-alternator-ground-strap","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45525,"registerId":"commonwealth-F2006B05235-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 206/30 Amdt 1 - Alternator Ground Strap","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Cessna 206 Series Aeroplanes\n\n \n\nAD/CESSNA 206/30\n\nAmdt 1\n\n\nAlternator Ground Strap 9/82\n\n \n\nApplicability: All model 206/P206 with S/Nos. 20600634 to 20604649 and P20600280 to P20600647.\n\n \n\nRequirement: Action in accordance with Cessna SIL SE79-59.\n\n \n\nNote: FAA AD 79-25-07 refers.\n\n \n\nCompliance: 1. Within 100 hours time in service after 31 March 1982.\n\n \n\n2. Each time an engine is installed in an aircraft following initial compliance.\n\n \n\nBackground: Compliance has been amended with the addition of item 2 due to reports from industry that ground straps are being omitted from refitment on engine reinstallations.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"The directive's scope was broadened by adding a recurrent compliance obligation. Originally it required the action within 100 hours time in service after 31 March 1982 (Compliance 1). The amendment added a second trigger requiring the same action each time an engine is installed after the initial compliance, extending the obligation beyond a one-off corrective action to an ongoing requirement tied to engine installation events (Compliance 2; Background)."},"complexity_factors":["Narrow applicability defined by explicit serial-number ranges (Applicability).","Reference to an external technical document (Cessna SIL SE79-59) for the required procedure (Requirement).","Two compliance triggers: a time-in-service deadline and a recurrent trigger on engine installation (Compliance 1 and 2).","Short text with limited procedural detail—relies on the external Service Information Letter for technical steps (Requirement).","Amendment history noted in Background explaining why the recurrent requirement was added (Background)."],"plain_english_summary":"What this instrument does (mechanical change)\n\n- Requires that an alternator ground strap be installed or confirmed in certain Cessna 206/P206 aeroplanes by following the procedures set out in Cessna Service Information Letter SE79-59 (Requirement).\n- Applies only to aeroplanes with serial numbers 20600634 to 20604649 and P20600280 to P20600647 (Applicability).\n- Sets two compliance triggers: first, the action must be completed within 100 hours time in service after 31 March 1982; second, the same action must be carried out each time an engine is installed after the initial compliance (Compliance: 1 and 2).\n\nOfficial rationale\n\n- The stated reason for adding the recurrent requirement is that industry reported ground straps were being omitted when engines were refitted (Background).\n\nWho this affects and who decides\n\n- Aircraft owners/operators of the listed Cessna 206/P206 aeroplanes are the parties required to ensure the work is done (Applicability; Compliance).\n- Maintenance providers or persons performing engine installations must follow Cessna SIL SE79-59 when carrying out the action (Requirement).\n- The Civil Aviation Safety Authority issues and records this airworthiness directive under the Civil Aviation Regulations framework (heading identifying Part 39 and the Schedule of Airworthiness Directives).\n\nWho pays and what behaviour changes\n\n- The direct costs fall on aircraft owners/operators and maintenance organisations: parts (ground strap if missing) and labour to comply with the Service Information Letter each time the trigger occurs (Requirement; Compliance 1 and 2).\n- Behaviour change required: operators must schedule and document the installation/check within the 100-hour window after 31 March 1982 and must ensure the alternator ground strap is fitted whenever an engine is installed after that initial compliance (Compliance 1 and 2).\n\nCompliance burden, incentives and risks\n\n- The directive references an external manufacturer document (Cessna SIL SE79-59) for the technical procedure; complying parties must obtain and follow that document (Requirement). This creates a dependency on an external technical standard rather than containing detailed steps within the directive itself.\n- The additional recurrent trigger (engine installation) increases the number of times the action must be performed compared with a one-off requirement, raising recurring maintenance cost and administrative tracking for owners and maintenance providers (Compliance 2; Background).\n- The Background notes non-compliance risk observed in industry (ground straps omitted on refitment), which is the stated implementation risk the amendment seeks to address (Background).\n\nTrade-offs and practical effects on private activity\n\n- Financially, the measure imposes modest, targeted repair and labour costs when the strap is absent or when engines are installed (Requirement; Compliance).\n- Operationally, independent maintenance shops and operators must incorporate the check/installation into engine-installation procedures and recordkeeping. That can shift when and by whom the task is performed (Requirement; Compliance 2).\n- The AD does not itself prescribe enforcement penalties in the text provided; it sets a mandatory correction and links to the manufacturer procedure, leaving regulatory enforcement and documentation to the aviation safety framework referenced in the heading (Part 39; Requirement)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original AD likely only required a one-time compliance by 1982. Amendment 1 expanded the scope to include recurring compliance — specifically requiring action 'each time an engine is installed' after initial compliance. This transformed a one-off inspection into an ongoing maintenance requirement triggered by a specific event (engine reinstallation)."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 substantive requirements with clear timeframes","Single cross-reference to external document (Cessna SIL SE79-59)","No defined terms section","Simple conditional logic (serial number ranges only)","Background explanation is plain English and clarifies rather than complicates"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific Cessna aircraft.\n\n**What it does:**\n- Requires owners and operators of certain Cessna 206 and P206 model aeroplanes to inspect or replace the **alternator ground strap** (an electrical cable that prevents dangerous static buildup and ensures proper electrical grounding).\n\n**Who it affects:**\n- Owners and operators of Cessna 206 and P206 aircraft with serial numbers between 20600634–20604649 and P20600280–P20600647.\n\n**What must be done:**\n- Follow the instructions in **Cessna Service Information Letter SE79-59** (a manufacturer bulletin).\n- Complete the work within **100 flight hours after 31 March 1982**.\n- **Crucially** (this is the new part in Amendment 1): Every time an engine is removed and reinstalled, the ground strap must be checked or replaced again. This second requirement was added because mechanics were forgetting to reinstall these straps during engine work, creating a safety risk.\n\n**Why it matters:**\nA missing or faulty ground strap can cause electrical failures or dangerous arcing (sparking). The amendment closes a loophole where the strap was being left off during routine engine maintenance, potentially leaving aircraft unsafe even after the initial fix was done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap","history":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap/history","analysis":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap/analysis","conflicts":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap/conflicts","importantCases":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap/important-cases","documents":"/api/acts/ad-cessna-206-30-amdt-1-alternator-ground-strap/documents"}}