{"id":"F2006B07478","name":"AD/TSA-600/12 - Fuel Crossfeed Placard - Installation","slug":"ad-tsa-600-12-fuel-crossfeed-placard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49896,"registerId":"commonwealth-F2006B07478-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TSA-600/12 - Fuel Crossfeed Placard - Installation","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)  Aerostar (Piper/Ted Smith) 600 and 700 Series Aeroplanes\n\n \n\nAD/TSA-600/12 Fuel Crossfeed Placard - Installation 3/78\n\nApplicability: All models with Airframe Sequence Numbers below 0475.\n\n \n\nRequirement: Install placard P/N TSA 030100-1 on the instrument panel in accordance with Ted Smith Corp. SB No. SB600-70.\n\n \n\nCompliance: Within 100 hours time in service after 31 March 1978.\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\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":false,"description":"The text supplied imposes a narrow, additional equipment/placard installation requirement on a specific subset of Aerostar aeroplanes (those with airframe sequence numbers below 0475). It does not expand or reduce the set of affected models beyond that stated applicability, nor does it modify other regulatory obligations. There is no indication in the supplied text that the directive changes scope from an earlier stated intent."},"complexity_factors":["Narrow applicability limited to aircraft with Airframe Sequence Numbers below 0475 (low scope breadth)","Single, discrete physical action required (install one placard) (low procedural complexity)","Compliance deadline measured in flight hours after a fixed date (simple temporal requirement but requires tracking hours)","Relies on an external document (Ted Smith Corp. SB600-70) for installation procedure (requires access to and following of manufacturer guidance)","Specific part number required (P/N TSA 030100-1) which removes ambiguity about what to install","No implementation or enforcement details in the text (limited administrative detail but does not complicate compliance mechanics)"],"plain_english_summary":"### What this directive does\n\nThis Airworthiness Directive (AD/TSA-600/12) requires that a specific fuel crossfeed placard (part number TSA 030100-1) be fitted to the instrument panel of certain Aerostar (Piper/Ted Smith) 600 and 700 series aeroplanes. The installation must follow the steps in Ted Smith Corp. Service Bulletin SB600-70. (Requirement)\n\n### Who this applies to\n\n- It applies only to Aerostar models whose airframe sequence numbers are below 0475. (Applicability)\n\n### What must happen and by when\n\n- The placard must be installed on the instrument panel in accordance with the cited service bulletin. (Requirement)\n- The work must be completed within 100 hours time in service after 31 March 1978. (Compliance)\n\n### Who pays, who decides, and what changes\n\n- Aircraft owners or operators are the parties who must have the placard fitted; they will bear the cost of acquiring the placard and arranging its installation. (Applicability; Requirement)\n- The Civil Aviation Safety Authority (through its Schedule of Airworthiness Directives) is the issuing authority that sets the requirement and the compliance timeframe. (header: Civil Aviation Safety Authority; Schedule of Airworthiness Directives)\n- The behaviour change required is limited and specific: owners/operators must arrange for a placard to be installed at the instrument panel to a defined standard (the manufacturer’s service bulletin). (Requirement)\n\n### Implementation mechanics, incentives and trade-offs\n\n- The AD prescribes a single, discrete hardware action (fit a labelled placard) using a manufacturer-specified procedure. This narrows compliance choices to following the service bulletin or an approved equivalent. (Requirement)\n- Costs are likely to be concentrated and observable: the owner/operator pays for the placard and installation labour. The AD does not specify cost recovery, a subsidy, or who provides the placard. (Requirement)\n- The directive creates a short, measurable compliance obligation (100 flight hours after a fixed date). That produces an operational scheduling constraint for owners/operators and maintenance providers who plan tasks by hours in service. (Compliance)\n- The AD ties compliance to an external document (Ted Smith Corp. SB600-70). Access to and interpretation of that service bulletin are necessary to complete the mandated action; this channels discretion about method to the manufacturer’s procedure. (Requirement)\n\n### Implementation risks and compliance burden\n\n- The action is narrowly defined and technically simple in scope, so direct implementation risk is low, but compliance depends on having the correct placard (P/N TSA 030100-1) and following the service bulletin. (Requirement)\n- The AD does not state enforcement procedures or penalties; compliance monitoring would follow usual airworthiness directive oversight practices. (implicit from AD format)\n\n### Effects on private choice and market participants\n\n- Independent maintenance organisations or the aircraft owner can carry out the installation, subject to regulatory and maintenance approvals; the requirement does not itself allocate who must perform the work beyond the owner/operator’s responsibility to have it done. (Requirement)\n- The measure imposes a small, specific compliance cost on owners/operators of affected aircraft and leaves market structure, pricing and operating capability otherwise unchanged. (Applicability; Requirement)\n\n### Source-grounded citations\n\n- Applicability: “All models with Airframe Sequence Numbers below 0475.” (Applicability)\n- Requirement: “Install placard P/N TSA 030100-1 on the instrument panel in accordance with Ted Smith Corp. SB No. SB600-70.” (Requirement)\n- Compliance: “Within 100 hours time in service after 31 March 1978.” (Compliance)\n\nNote: the directive text supplied does not include an explicit statement of its underlying safety rationale; the title identifies the subject as a \"Fuel Crossfeed Placard,\" which indicates the placard relates to fuel crossfeed procedures or warnings, but no explanatory memorandum or stated benefits/costs appear in the supplied text."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive. It has not expanded beyond its original purpose of mandating a specific placard installation for a defined aircraft population. The scope remains precisely as intended when issued."},"complexity_factors":["Extremely short document (approximately 150 words of substantive content)","Only 3 operative provisions: applicability, requirement, and compliance deadline","No defined terms section — all language is plain technical aviation terminology","Single cross-reference to manufacturer service bulletin (SB600-70), but no legislative cross-references","No conditional logic, exceptions, or nested provisions","Linear structure with clear headings"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** It requires owners or operators of certain Aerostar aeroplanes (Piper/Ted Smith 600 and 700 series) to install a specific warning label (placard) on the instrument panel. The placard (part number TSA 030100-1) warns pilots about the fuel crossfeed system — a mechanism that allows fuel to flow between tanks on opposite wings.\n\n**Who it affects:** Anyone who owns or operates an Aerostar 600 or 700 series aircraft with an airframe serial number below 0475. These are older twin-engine propeller aircraft originally built by Ted Smith (later Piper).\n\n**Why it matters:** Fuel crossfeed systems can be dangerous if misused — for example, if a pilot accidentally allows fuel to drain from one tank to another in an unbalanced way, it could lead to fuel starvation and engine failure. The placard serves as a permanent visual reminder to help prevent pilot error.\n\n**What must be done:** The placard must be installed following the manufacturer's Service Bulletin (SB600-70), and this must be completed within 100 hours of flying time after 31 March 1978.\n\n**Key point:** This is a retrospective safety fix — it applies to aircraft already in service, not just new ones. Non-compliance means the aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation","history":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation/history","analysis":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation/analysis","conflicts":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation/conflicts","importantCases":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation/important-cases","documents":"/api/acts/ad-tsa-600-12-fuel-crossfeed-placard-installation/documents"}}