{"id":"F2006B09410","name":"AD/ELECT/26 - Nickel Cadmium Batteries - Double D Washers - Inspection and Removal","slug":"ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53776,"registerId":"commonwealth-F2006B09410-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/ELECT/26 - Nickel Cadmium Batteries - Double D Washers - Inspection and Removal","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 - 107 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Electrical Equipment\n\n \n\n# AD/ELECT/26 Nickel Cadmium Batteries - Double “D”\n\nWashers - Inspection and Removal\n\nApplicability: Sonotone or Marathon type CA-9 and MA-9 Nickel Cadmium Batteries.\n\n# 10/73\n\n \n\nRequirement: 1. Inspect battery lid to ensure that the socket head cap screws which secure the cells connectors have not cut through the lid gasket.\n\n \n\n2.    Inspect the top of the battery to ensure that P/N 23591-1 double “D” washers are not fitted under the head of the P/N 10488-20 socket head cap screws.\n\n \n\n3.    If Double “D” washers are fitted remove them from under the head of all the socket head cap screws. Check connector straps and cell terminals for cleanliness, replace connectors and assemble all P/N 10488-20 socket head cap screws and P/N 16128-1 Belleville spring washers finger tight. Finally tighten all socket head cap screws to a torque value of 35-50 inch lbs.\n\n \n\nCompliance: Before commencing the next deep cycle check after 31 October 1973.\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":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1325},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow technical scope targeting specific battery hardware modifications without expansion into broader operational areas."},"complexity_factors":["Single applicability criterion (two specific battery model numbers)","Only 3 procedural requirements with linear logic","No cross-references to other legislation or regulations","Simple conditional logic (if present, then remove)","No defined terms section or interpretive provisions"],"plain_english_summary":"This directive requires aircraft maintenance crews to inspect Sonotone and Marathon CA-9/MA-9 nickel‑cadmium batteries for lid‑seal damage and banned \"Double D\" washers (part 23591‑1), remove any found, clean connectors, and reinstall using only the specified Belleville spring washers torqued to 35–50 in‑lb. It affects operators and maintenance personnel and aims to eliminate a washer‑related failure mode that could compromise battery reliability in flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal","history":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal/history","analysis":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal/analysis","conflicts":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal/conflicts","importantCases":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal/important-cases","documents":"/api/acts/ad-elect-26-nickel-cadmium-batteries-double-d-washers-inspection-and-removal/documents"}}