{"id":"F2006B05605","name":"AD/PA-28/47 - Automatic Pilot Roll Servo Shear Pin - Installation","slug":"ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135215,"registerId":"commonwealth-F2006B05605-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-28/47 - Automatic Pilot Roll Servo Shear Pin - Installation","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-28 Series Aeroplanes\n\n \n\nAD/PA-28/47 Automatic Pilot Roll Servo Shear Pin - Installation 9/74\n\nApplicability: All models fitted with Edo-Aire Mitchell Automatic Pilot AK085E. Document:  1. Piper SL No. 695; or\n\n2. Edo-Aire Mitchell SL ML38.\n\n \n\nCompliance: Within 200 hours time in service after 30 September 1974.\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\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1573},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope from 1974, addressing only the specific safety modification for the identified aircraft equipment. There is no evidence of scope creep or expansion beyond the original technical safety intent."},"complexity_factors":["Extremely short length (single requirement)","Requires cross-referencing external technical documents (service letters) for actual installation procedures","Technical aviation terminology ('roll servo', 'shear pin', 'time in service') requires specialized knowledge to interpret"],"plain_english_summary":"**What this does:** This is a safety directive requiring owners of specific Piper PA-28 aircraft to install a shear pin (a safety device designed to break under excessive load) on the automatic pilot roll servo mechanism.\n\n**Who it affects:** Owners and operators of Piper PA-28 series aeroplanes fitted with an Edo-Aire Mitchell Automatic Pilot model AK085E.\n\n**What you must do:** If your aircraft matches the description above, you must have the shear pin installed according to the technical instructions found in:\n- Piper Service Letter No. 695, **or**\n- Edo-Aire Mitchell Service Letter ML38\n\n**When:** The work must be completed within 200 hours of flight time (\"time in service\") after 30 September 1974.\n\n**Why it matters:** This modification prevents potential failures in the autopilot system that could affect aircraft control."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation","history":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation/history","analysis":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation/analysis","conflicts":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation/conflicts","importantCases":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation/important-cases","documents":"/api/acts/ad-pa-28-47-automatic-pilot-roll-servo-shear-pin-installation/documents"}}