{"id":"F2006B02425","name":"AD/ANSON/8 - Fuel Crossfeed Cock Placard - Installation","slug":"ad-anson-8-fuel-crossfeed-cock-placard-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41668,"registerId":"commonwealth-F2006B02425-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ANSON/8 - Fuel Crossfeed Cock 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)  Avro Anson and Avro 19 Series Aeroplanes\n\n \n\nAD/ANSON/8 Fuel Crossfeed Cock Placard - Installation 3/52\n\nApplicability: Anson.\n\n \n\nRequirement: Install a placard adjacent to the fuel crossfeed cock, indicating clearly the “ON” and “OFF” positions of the cock when viewed from the pilot’s seat; or\n\n \n\nANO 105.1.31.4.5.9.\n\n \n\nCompliance: Forthwith.\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 supplied text does not show any amendment history or departure from an earlier stated intent. The directive sets a narrowly framed requirement (placard installation or alternative ANO compliance) applicable to Anson aircraft with immediate effect; there is no indication in this instrument that its scope has changed from an earlier version."},"complexity_factors":["Narrow applicability: limited to Anson aircraft (Applicability)","Single, simple operative requirement (install a placard indicating ON/OFF) with no technical specification beyond visibility from the pilot’s seat (Requirement)","Immediate compliance required (‘Forthwith’), which raises scheduling urgency but not technical complexity (Compliance)","Alternative compliance route referenced (ANO 105.1.31.4.5.9) which introduces an external cross-reference but not detailed complexity within this text (Requirement)","No procedural or certification details in the supplied text, reducing procedural complexity but shifting potential complexity to external rules not reproduced here (Requirement)"],"plain_english_summary":"What this instrument changes mechanically\n\n- It requires that an Avro Anson aircraft have a placard installed next to its fuel crossfeed cock that clearly shows the “ON” and “OFF” positions as seen from the pilot’s seat. (Requirement)\n- As an alternative to that placard installation it references compliance with ANO 105.1.31.4.5.9. (Requirement)\n- The requirement applies to Anson aircraft. (Applicability)\n- The work must be carried out immediately: the compliance time is “Forthwith.” (Compliance)\n\nWho this affects and who pays\n\n- Applicability is limited to Anson aircraft, so the direct duty-bearers are the owners/operators of those aircraft and whoever carries out their maintenance. (Applicability)\n- The owners/operators will bear the direct cost of producing and fitting the placard or arranging whatever is required under the alternative ANO provision. (Requirement)\n\nClaimed purpose and how that maps to costs and incentives\n\n- The directive itself mandates the placard; it does not set out a detailed rationale in the text supplied. The proximate, observable effect of the instruction is to make the fuel crossfeed cock’s ON/OFF positions visibly clear from the pilot’s seat. (Requirement)\n- If the intended effect is greater clarity of the cock position for the pilot, the likely costs are the small one‑off expense of a compliant placard and the labour/time to install it. Those costs fall on the aircraft owner/operator. (Requirement; Applicability)\n\nTrade-offs, opportunity costs and implementation risks (source-grounded)\n\n- Trade-offs: the AD replaces any previous cockpit labelling practice for the crossfeed cock with a mandatory placard or the alternative ANO compliance path. That reduces operator discretion about how labelling is provided but does not specify the exact placard design beyond the requirement that it indicate “ON” and “OFF” positions when viewed from the pilot’s seat. (Requirement)\n- Opportunity cost: time spent scheduling and performing the installation (immediate due to the “Forthwith” deadline) may displace other maintenance or operations until the task is complete. (Compliance)\n- Implementation risk: the text provides a straightforward, low-technical task (install a placard) and sets no complex technical standard in the supplied text, so implementation risk appears low on its face. (Requirement)\n\nCompliance burden and administrative discretion\n\n- Compliance burden is narrow and operational: produce and affix a placard or follow ANO 105.1.31.4.5.9. The AD does not, in the supplied text, specify who must certify the work, nor does it specify a placard specification beyond the visible indication requirement. That leaves some scope for how the placard is produced and installed subject to the alternative ANO path. (Requirement)\n- The instrument itself contains no additional discretionary exemptions, waivers, or certification procedures in the supplied text; any discretion would come from the referenced ANO provision or from usual regulatory oversight processes not reproduced here. (Requirement)\n\nEffects on businesses and markets (source-grounded)\n\n- The AD imposes a small, mandatory compliance cost on the set of Anson owners/operators (a narrow group). (Applicability; Requirement)\n- The work can be performed by whatever maintenance provider the owner chooses; the AD does not restrict who may perform the installation in the supplied text, so independent maintenance organisations can compete to provide the service unless other regulatory limits apply outside this text. (Requirement)\n\nNet practical picture\n\n- Mechanically, the AD creates a simple, immediate labelling obligation for the fuel crossfeed cock on Anson aircraft. (Requirement; Applicability; Compliance)\n- The primary, observable effects are (1) an immediate operational task for affected aircraft, and (2) a small direct cost to owners/operators to produce and install the placard or to comply via the alternative ANO route. (Requirement; Applicability; Compliance)\n\nSource references (quotes from the instrument)\n\n- “Applicability: Anson.” (Applicability)\n- “Requirement: Install a placard adjacent to the fuel crossfeed cock, indicating clearly the ‘ON’ and ‘OFF’ positions of the cock when viewed from the pilot’s seat; or ANO 105.1.31.4.5.9.” (Requirement)\n- “Compliance: Forthwith.” (Compliance)"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose safety directive from 1952 (indicated by \"3/52\" in the reference number). It has not expanded beyond its original narrow purpose of requiring a fuel valve label on one specific aircraft type. Airworthiness Directives are inherently narrow in scope — they address specific safety defects in specific aircraft models."},"complexity_factors":["Extremely short — only 4 substantive lines of requirements","No defined terms section","Single applicability criterion (\"Anson\")","Simple binary alternative compliance path (install placard OR follow ANO)","No cross-references to other legislation except one obsolete Air Navigation Order","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"This is an **Airworthiness Directive** (a mandatory safety order) for **Avro Anson aircraft** — a British twin-engine plane from the 1930s-40s used extensively in WWII and post-war Australia.\n\n**What it requires:**\n- Install a **label (placard)** next to the **fuel crossfeed cock** (a valve that lets fuel flow between the left and right fuel tanks)\n- The label must clearly show **\"ON\"** and **\"OFF\"** positions\n- The labels must be **visible from the pilot's seat**\n\n**Why it matters:**\nWithout clear markings, pilots could accidentally leave fuel flowing between tanks when they shouldn't (or block it when they need it). In an emergency — like an engine failure — knowing exactly which position that valve is in can be the difference between a controlled landing and a crash. This is a basic but critical safety fix.\n\n**Who must comply:**\nAnyone operating an Avro Anson aircraft in Australia. The directive says \"Forthwith\" — meaning **immediately**, with no grace period.\n\n**The weird \"ANO\" reference:**\nThe document mentions \"ANO 105.1.31.4.5.9\" — this is an alternative way to comply using an old **Air Navigation Order** (a predecessor to modern aviation regulations). Basically: follow this label rule, OR follow that specific old rule instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation","history":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation/history","analysis":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation/analysis","conflicts":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation/conflicts","importantCases":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation/important-cases","documents":"/api/acts/ad-anson-8-fuel-crossfeed-cock-placard-installation/documents"}}