{"id":"F2006B08342","name":"AD/CESSNA 400/56 - Upper Inner Cabin Door Handle and Locking Mechanism - Inspection","slug":"ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115749,"registerId":"commonwealth-F2006B08342-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 400/56 - Upper Inner Cabin Door Handle and Locking Mechanism - Inspection","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 400/56 Upper Inner Cabin Door Handle and\n\nLocking Mechanism - Inspection\n\nApplicability: All model 402B with S/Nos. 402B-1301 to 402B-1349.\n\nAll model 404 with S/Nos. 404-0201 to 404-0237.\n\nAll model 414A with S/Nos. 414A-0001 to 414A-0059. All model 421C with S/Nos. 421C-0401 to 421C-0504.\n\n \n\nDocument: Cessna SL No. ME 78-21.\n\n \n\nCompliance: Within 100 hours time in service after 30 September 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\n9/78\n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1762},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive remains precisely targeted on its original safety purpose: ensuring door handle and locking mechanism integrity on specific Cessna aircraft. It has not expanded beyond this narrow mechanical inspection requirement."},"complexity_factors":["Single, discrete maintenance task with specific technical scope","Clear applicability limited to defined aircraft models and serial number ranges","Simple compliance trigger (100 hours time-in-service after fixed date)","Only one external document referenced (Cessna Service Letter ME 78-21)","No conditional requirements, exceptions, or nested logic"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of certain Cessna twin‑engine aircraft (specific 402B, 404, 414A, and 421C serial‑number ranges) to inspect the upper inner cabin door handle and locking mechanism per Cessna Service Letter No. ME 78‑21 within 100 flight hours after 30 Sept 1978. It prevents accidental in‑flight door opening that could cause rapid decompression, structural damage, or loss of control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection","history":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection/history","analysis":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection/analysis","conflicts":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection/conflicts","importantCases":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection/important-cases","documents":"/api/acts/ad-cessna-400-56-upper-inner-cabin-door-handle-and-locking-mechanism-inspection/documents"}}