{"id":"F2006B05171","name":"AD/CESSNA 188/35 - Fuel Cap Alignment Placard","slug":"ad-cessna-188-35-fuel-cap-alignment-placard","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45304,"registerId":"commonwealth-F2006B05171-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 188/35 - 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 188 (Agwagon) Series Aeroplanes\n\n \n\nAD/CESSNA 188/35 Fuel Cap Alignment Placard 9/80\n\nApplicability: Model A188 (with wing tanks) with S/Nos. 653, 188-0446 to 188-0572, 18800573 and subsequent, Model A188B with S/Nos. 18800967T and subsequent.\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\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, time-bound safety directive from 1980 addressing a specific mechanical issue (fuel cap alignment) on specific aircraft. It has not expanded beyond its original narrow technical scope."},"complexity_factors":["Extremely short document (under 200 words)","Only 2 defined applicability criteria (serial number ranges)","Single requirement referencing an external document (Cessna SIL No. SE 80-59)","No nested conditions, exceptions, or cross-references to other legislation","Simple compliance deadline (100 hours time in service after fixed date)","No interpretative provisions or defined terms section"],"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 Cessna 188 agricultural aircraft (often called \"Agwagons\").\n\n**Who it affects:** Owners and operators of particular Cessna 188 models with wing fuel tanks, specifically:\n- Model A188 with serial numbers starting at 653, then 188-0446 through 188-0572, and everything after 18800573\n- Model A188B with serial numbers 18800967T and onwards\n\n**What it requires:** Operators must follow the instructions in Cessna Service Information Letter (SIL) No. SE 80-59. This involves installing or checking a **placard** (a warning/instruction label) that ensures fuel caps are aligned correctly. The caps must sit flush — if misaligned, they can block the fuel tank's secondary vent system, which could cause dangerous pressure issues.\n\n**When it had to be done:** Within 100 hours of flight time after 30 September 1980.\n\n**Why it matters:** Misaligned fuel caps can prevent the fuel tank from breathing properly. In an agricultural aircraft working low and hard, fuel system failures can lead to engine stoppage — potentially catastrophic when spraying crops at low altitude."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument itself sets out applicability, the required action (to follow Cessna SIL No. SE 80-59), and a compliance deadline. The text contains no statement indicating a change from an earlier or different scope; it defines the scope as the listed models/serial numbers and the SIL-prescribed action (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow applicability limited to specific Cessna 188 models and serial numbers (Applicability).","Substantive technical steps are not included in the directive; compliance depends on an external manufacturer's document (Cessna SIL No. SE 80-59) (Requirement).","Fixed compliance window measured in hours time in service requires operational scheduling (Compliance).","No cost estimates, alternative compliance methods, or exemptions are provided in the text, so practical complexity depends on accessing and following the SIL (Requirement)."],"plain_english_summary":"Owners/operators of specified Cessna 188 A/A188B aeroplanes (listed serial ranges) must, within 100 hours TIS after 30 Sep 1980, implement the fuel-cap alignment and placard actions set out in Cessna Service Instruction Letter No. SE 80-59. This preserves correct flush-cap alignment to ensure proper fuel-tank secondary venting. Compliance costs (labor, parts, inspections) are borne by the owner/operator; the SIL provides the mandatory technical method."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard","history":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard/history","analysis":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard/analysis","conflicts":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard/conflicts","importantCases":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard/important-cases","documents":"/api/acts/ad-cessna-188-35-fuel-cap-alignment-placard/documents"}}