{"id":"F2006B05951","name":"AD/PA-38/13 - Magnetic Compass Mounting Hardware","slug":"ad-pa-38-13-magnetic-compass-mounting-hardware","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":136104,"registerId":"commonwealth-F2006B05951-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-38/13 - Magnetic Compass Mounting Hardware","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)  Piper PA-38 (Tomahawk) Series Aeroplanes\n\n \n\nAD/PA-38/13 Magnetic Compass Mounting Hardware 10/79\n\nApplicability: All models 38-78A0001 to 38-78A0025. Document:  Piper SL No. 877 Part VI.\n\nCompliance: Within 100 hours time in service after 21 October 1979.\n\n \n\nBackground:  The mounting hardware used for the magnetic compass may become magnetised and cause excessive compass deviations. Changes to the installation will replace existing mounting with non magnetic materials.\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","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":890},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The directive maintains its original narrow scope: a specific hardware replacement for specific aircraft serial numbers to address a known magnetisation defect. No expansion of scope is evident."},"complexity_factors":["Single, clearly defined applicability (specific serial number range)","One straightforward compliance requirement (replace hardware)","No defined terms section or interpretive provisions","No conditional exceptions or nested logic","Document length is less than 200 words"],"plain_english_summary":"**What this is:** A safety order (Airworthiness Directive) requiring specific Piper Tomahawk aircraft owners to fix a compass problem.\n\n**Who it affects:** Owners and operators of Piper PA-38 Tomahawk aeroplanes with serial numbers 38-78A0001 through 38-78A0025.\n\n**What the problem is:** The metal brackets and screws holding the magnetic compass can become magnetised over time. This causes the compass to give wrong readings (excessive deviation), which is dangerous because pilots rely on compass headings for navigation.\n\n**What must be done:** Replace the existing magnetic compass mounting hardware with non-magnetic materials. The work must follow the instructions in **Piper Service Letter No. 877 Part VI** (the manufacturer’s technical guide).\n\n**When:** Within 100 hours of flying time after 21 October 1979.\n\n**Why it matters:** A faulty compass can lead to navigation errors and accidents. This directive ensures aircraft maintain accurate heading information for safe flight operations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware","history":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware/history","analysis":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware/analysis","conflicts":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware/conflicts","importantCases":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware/important-cases","documents":"/api/acts/ad-pa-38-13-magnetic-compass-mounting-hardware/documents"}}