{"id":"F2006B08340","name":"AD/CESSNA 400/54 - Hydraulic Pump Outlet Pressure Line Identification","slug":"ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115747,"registerId":"commonwealth-F2006B08340-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/54 - Hydraulic Pump Outlet Pressure Line Identification","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 400 Series Aeroplanes\n\n \n\nAD/CESSNA 400/54 Hydraulic Pump Outlet Pressure\n\nLine Identification\n\nApplicability: Model 404 with S/No. 404-0001 thru 404-0133. Document:  Cessna SL ME78-12.\n\nCompliance: Within 100 hours time in service after 31 July 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\n\n7/78\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1898},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains a narrow, technical scope focused solely on hydraulic line identification requirements for a specific subset of Cessna 404 aircraft. It has not expanded beyond its original aviation safety purpose."},"complexity_factors":["External technical reference requiring cross-consultation (Cessna Service Letter ME78-12)","Narrow applicability limited to specific aircraft serial number range (404-0001 thru 404-0133)","Minimal conditional logic (only date and flight hours trigger)","Extremely brief substantive content (under 100 words of operative text)"],"plain_english_summary":"**What this is:** A mandatory safety notice (called an *Airworthiness Directive*) issued by the Civil Aviation Safety Authority.\n\n**Who it affects:** Owners and operators of **Cessna Model 404 aircraft** with serial numbers 404-0001 through 404-0133.\n\n**What you must do:** Identify the hydraulic pump outlet pressure line following the instructions in **Cessna Service Letter ME78-12**. This means applying specific markings or labels so mechanics can tell this high-pressure hose apart from other hydraulic lines during maintenance.\n\n**When:** Complete this work within **100 hours of flight time** after 31 July 1978.\n\n**Why it matters:** Clear identification prevents maintenance crews from accidentally disconnecting or confusing critical hydraulic lines, which could lead to loss of hydraulic pressure and control issues during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification","history":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification/history","analysis":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification/analysis","conflicts":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification/conflicts","importantCases":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification/important-cases","documents":"/api/acts/ad-cessna-400-54-hydraulic-pump-outlet-pressure-line-identification/documents"}}