{"id":"F2006B10811","name":"AD/INST/10 Amdt 1 - Mechanisms Ltd. Fatigue Meter","slug":"ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56289,"registerId":"commonwealth-F2006B10811-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/INST/10 Amdt 1 - Mechanisms Ltd. Fatigue Meter","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)  Instruments and Automatic Pilots\n\n \n\nAD/INST/10\n\nAmdt 1\n\n\nMechanisms Ltd. Fatigue Meter 7/73\n\n \n\nApplicability: All Mechanisms Ltd. (including Negretti and Zambra Ltd.) Fatigue meters installed in aircraft.\n\n \n\nRequirement: 1. All fatigue meters shall be calibrated and overhauled at intervals not exceeding those shown in Para. 2, by an organisation approved for the purpose, and in accordance with standards and specifications approved by the Secretary.\n\n \n\n2. Calibration and Overhaul Intervals.\n\n \n\nFatigue Meter Type Calibration Interval Overhaul Interval\n\n \n\nSingle Spring Units e.g. Types M1729, M1829.\n\n \n\nDual Spring Units e.g. Types M1946, M1948.\n\n \n\nCompliance: As detailed above.\n\n\nSix months Two years\n\n \n\nTwelve months Four years\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1563},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on the original scope of maintaining fatigue meter accuracy. It does not expand beyond the specific manufacturer models originally covered or introduce new categories of requirements."},"complexity_factors":["Single-purpose instrument targeting only 4 specific device models","Simple binary classification system (single vs dual spring units)","No legislative cross-references or nested exceptions","Straightforward compliance table with only two variables (calibration and overhaul intervals)","Minimal defined terms (only 'Secretary' requires contextual knowledge)"],"plain_english_summary":"This Airworthiness Directive requires regular servicing of mechanical fatigue meters made by Mechanisms Ltd. (including Negretti & Zambra) installed on aircraft to keep load-recording accurate. Single-spring units need calibration every 6 months and overhaul every 2 years; dual-spring units need calibration every 12 months and overhaul every 4 years. Work must be done by a CASA‑approved maintenance organisation to Secretary‑approved standards. It preserves accurate fatigue monitoring to reduce the risk of undetected structural failure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter","history":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter/history","analysis":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter/analysis","conflicts":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter/conflicts","importantCases":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter/important-cases","documents":"/api/acts/ad-inst-10-amdt-1-mechanisms-ltd-fatigue-meter/documents"}}