{"id":"F2006B05031","name":"AD/CESSNA 177/9 - Fuel Quantity Transmitter","slug":"ad-cessna-177-9-fuel-quantity-transmitter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44941,"registerId":"commonwealth-F2006B05031-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 177/9 - Fuel Quantity Transmitter","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 177 Series Aeroplanes\n\n \n\nAD/CESSNA 177/9 Fuel Quantity Transmitter 4/70\n\nApplicability: Models 177 and 177A with S/Nos. 17700001 through 17701160, 17701165 through\n\n17701168, 17701171, 17701174 through 17701178 and 17701180.\n\n \n\nRequirement: Action in accordance with Cessna SL No. SE69-25.\n\n \n\nNote: FAA AD 70-1-2 refers.\n\n \n\nCompliance: Within 100 hours time in service after 29 April 1971.\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":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating a fuel transmitter fix for the identified Cessna models."},"complexity_factors":["Very short document (approximately 150 words)","Only 4 substantive sections: Applicability, Requirement, Note, and Compliance","Single cross-reference to external document (Cessna SL No. SE69-25)","Simple conditional logic: applies only to specific serial numbers","No defined terms section","No nested exceptions or conditional clauses"],"plain_english_summary":"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:**\nOrders owners and operators of certain **Cessna 177 and 177A aircraft** (specific serial numbers listed) to inspect or fix a problem with the **fuel quantity transmitter** — the device that tells the pilot how much fuel is in the tank.\n\n**Who it affects:**\nAnyone who owns or operates a Cessna 177 or 177A with serial numbers between 17700001 and 17701160, plus a few scattered additional serial numbers (17701165-17701168, 17701171, 17701174-17701178, and 17701180).\n\n**What must be done:**\nFollow the instructions in **Cessna Service Letter SE69-25** (a technical bulletin from the manufacturer). The directive also notes that the US Federal Aviation Administration issued a similar order (FAA AD 70-1-2).\n\n**When it must be done:**\nWithin **100 hours of flying time** after 29 April 1971.\n\n**Why it matters:**\nFaulty fuel gauges can lead to fuel starvation, engine failure, and potentially fatal accidents. This directive ensures the problem is fixed before the aircraft accumulates too much flight time."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The supplied AD text states its applicability, mandatory requirement and compliance time and does not indicate any amendment or expansion of scope within the document. There is no material in the text showing a change from the AD’s original stated purpose; it consistently mandates the remedy in Cessna SL No. SE69-25 for the listed serial-numbered aircraft (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow technical scope limited to specific aircraft models and serial-number ranges (Applicability)","Mandatory compliance linked to an external document (Cessna SL No. SE69-25) rather than described in full in the AD (Requirement)","Fixed compliance period tied to a historical date (100 hours TIS after 29 April 1971) which may create scheduling considerations for operators (Compliance)","Cross-reference to related foreign AD (FAA AD 70-1-2) that may require consultation for context (Note)","Regulatory authority and mandatory nature are straightforward (header), lowering legal interpretive complexity"],"plain_english_summary":"This AD makes compliance with Cessna Service Letter SE69-25 mandatory for certain serial-numbered Cessna 177 and 177A aeroplanes to address a fuel-quantity transmitter issue. Owners/operators of the affected aircraft must arrange and pay for the work, to be completed within 100 hours time-in-service after 29 April 1971."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter","history":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter/history","analysis":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter/analysis","conflicts":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter/conflicts","importantCases":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter/important-cases","documents":"/api/acts/ad-cessna-177-9-fuel-quantity-transmitter/documents"}}