{"id":"F2006B05074","name":"AD/CESSNA 180/61 - Fuel Cap Alignment Placard","slug":"ad-cessna-180-61-fuel-cap-alignment-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44984,"registerId":"commonwealth-F2006B05074-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/61 - Fuel Cap Alignment Placard","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 180, 182 and Wren 460 Series Aeroplanes\n\n \n\nAD/CESSNA 180/61 Fuel Cap Alignment Placard 12/80\n\nApplicability: Model 180 with S/Nos. 604, 624, 645, 30000 to 32999, 50001 to 50911 and\n\n18050912 to 18053132.\n\n \n\nModel 182 with S/Nos. 613, 631, 634, 33000 to 34999, 51001 to 53007 and\n\n18253008 to 18267514.\n\n \n\nModel F182 with S/Nos. F18200001 to F18200129.\n\n \n\nModel R182/TR182 with S/Nos. R18200001 to R18201460. Model FR182 with S/Nos. FR18200001 to FR18200045.\n\nModel A182 with S/Nos. A182-0001 and on.\n\n \n\nRequirement: Action in accordance with Cessna SIL No. SE 80-59. Compliance:  Within 100 hours time in service after 30 September 1980.\n\nBackground: Correct alignment of flush fitting type fuel caps is essential for efficient operation of the fuel tank secondary vent system.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose airworthiness directive from 1980. It has not expanded beyond its original intent: mandating a specific safety placard for specific aircraft models. The scope remains tightly constrained to the fuel cap alignment issue identified in the background."},"complexity_factors":["Very short document (under 300 words)","Only 3 main operative sections: Applicability, Requirement, and Compliance","No defined terms section — all language is plain technical English","Single cross-reference to external document (Cessna SIL No. SE 80-59)","No nested conditions or exceptions","Applicability determined by simple serial number ranges"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:** It requires owners and operators of certain Cessna 180 and 182 series aeroplanes (plus the Wren 460) to install a placard (a warning label) near the fuel caps. The placard reminds people to align the flush-fitting fuel caps correctly.\n\n**Why it matters:** If these fuel caps aren't aligned properly, the fuel tank's secondary vent system won't work properly. This could lead to fuel flow problems, engine stalling, or even fuel leaks — all serious safety risks in flight.\n\n**Who must comply:** Anyone operating the specific Cessna models and serial numbers listed. They must follow Cessna's Service Information Letter No. SE 80-59 and complete the work within 100 hours of flying time after 30 September 1980.\n\n**Key takeaway:** A simple label installation prevents potentially catastrophic fuel system failures."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument prescribes a specific corrective action for clearly listed aircraft models and serial numbers and sets a fixed compliance deadline. The text contains no statement indicating a change to the instrument’s original applicability or requirement; it defines scope by the listed models/serial numbers and by reference to the Cessna SIL. There is no internal evidence in the supplied text that the scope has been expanded or narrowed from an earlier version."},"complexity_factors":["Narrow, detailed applicability defined by multiple model names and serial number ranges (Applicability)","Procedural detail is delegated to an external manufacturer document (Cessna SIL No. SE 80-59), requiring operators to obtain and follow that document (Requirement)","Fixed compliance window tied to aircraft hours (100 hours TIS after 30 September 1980) creating operational scheduling constraints (Compliance)","Technical nature of the action (fuel cap alignment/placard) requires qualified maintenance personnel, not a simple administrative step (Background)"],"plain_english_summary":"This directive requires owners/operators of specific Cessna 180/182 (and related) serial-numbered aircraft to fit or align a fuel‑cap alignment placard per Cessna SIL No. SE 80‑59, to be completed within 100 hours time‑in‑service after 30 Sept 1980. It affects only listed models/serials, imposes owner-funded maintenance by licensed personnel, and aims to ensure correct fuel‑cap alignment for proper secondary vent operation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard","history":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard/history","analysis":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard/analysis","conflicts":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard/conflicts","importantCases":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard/important-cases","documents":"/api/acts/ad-cessna-180-61-fuel-cap-alignment-placard/documents"}}