{"id":"F2006B05068","name":"AD/CESSNA 180/55 - Ammeter Type and Position","slug":"ad-cessna-180-55-ammeter-type-and-position","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":44978,"registerId":"commonwealth-F2006B05068-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 180/55 - Ammeter Type and Position","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 180, 182 and Wren 460 Series Aeroplanes\n\nAD/CESSNA 180/55 Ammeter Type and Position 9/78\n\nApplicability: All models.\n\nRequirement: 1. Inspect aircraft to ascertain if the ammeter has been modified as per Rex Drawing RA-A-1109 or if a centre zero ammeter (charge/discharge type) is connected in the alternator line.\n\n2. Reconnect centre zero ammeter (charge/discharge type) into the battery line as per original Cessna wiring diagrams.\n\nNote: This requirement can be quickly checked by switching on the battery master switch (alternator not running) and a load such as a landing light switch and noting the following:\n\n    (a) if ammeter reads below zero in the discharge sector then it is connected in the battery line.\n\n    (b) if the ammeter still reads zero when a load is applied it is quite possibly connected in the alternator line and needs to be reconnected into the battery line.\n\nCompliance: Within the next 100 hours time in service after 30 September 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2612},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: addressing a specific wiring safety defect in defined Cessna aircraft models. It has not expanded beyond the original technical correction intent."},"complexity_factors":["Single specific technical requirement (rewiring)","Limited applicability to three specific aircraft series","Clear binary test procedure (zero vs discharge reading)","No nested exceptions or conditional clauses","Minimal cross-referencing (only to original Cessna diagrams)"],"plain_english_summary":"This AD requires owners/operators of Cessna 180, 182 and Wren 460 series aircraft to inspect and, if needed, rewire centre‑zero ammeters that were mistakenly tied to the alternator rather than the battery. If miswired the gauge can read zero during alternator failure while the battery is discharging, risking in‑flight electrical loss. A simple master‑on, high‑draw lamp test is provided; compliance was required within 100 flight hours after 30 Sept 1978."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-180-55-ammeter-type-and-position","history":"/api/acts/ad-cessna-180-55-ammeter-type-and-position/history","analysis":"/api/acts/ad-cessna-180-55-ammeter-type-and-position/analysis","conflicts":"/api/acts/ad-cessna-180-55-ammeter-type-and-position/conflicts","importantCases":"/api/acts/ad-cessna-180-55-ammeter-type-and-position/important-cases","documents":"/api/acts/ad-cessna-180-55-ammeter-type-and-position/documents"}}