{"id":"F2006B05492","name":"AD/PA-23/65 - Automatic Pilot Roll Servo Shear Pin - Installation","slug":"ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46325,"registerId":"commonwealth-F2006B05492-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-23/65 - Automatic Pilot Roll Servo Shear Pin -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-23 (Apache and Aztec) Series Aeroplanes\n\n \n\nAD/PA-23/65 Automatic Pilot Roll Servo Shear Pin - Installation 9/74\n\nApplicability: All models fitted with Edo-Aire Mitchell Automatic Pilot AK090, AK081, AK081R, AK067 or AK079E.\n\n \n\nDocument: Piper SL No. 695; or\n\n \n\nEdo-Aire Mitchell SL ML38.\n\n \n\nCompliance: Within 200 hours time in service after 30 September 1974.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1409},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This appears to be the original technical directive as issued, maintaining a narrow scope focused specifically on the autopilot roll servo shear pin installation for the specified Piper PA-23 aircraft models. No evidence of expansion beyond the original safety intent."},"complexity_factors":["Single, specific mechanical modification required","No defined terms or interpretation section","Clear applicability limited to specific aircraft models and autopilot types","Straightforward compliance deadline (200 hours time in service)","References only two external technical documents for implementation details"],"plain_english_summary":"**What this does**\nThis directive mandates the installation of a **shear pin** (a safety device that breaks under excessive load to prevent system damage) in the automatic pilot (autopilot) roll servo mechanism on specific Piper aircraft.\n\n**Who it affects**\nOwners and operators of **Piper PA-23 Apache and Aztec** aircraft fitted with specific Edo-Aire Mitchell autopilot models: AK090, AK081, AK081R, AK067, or AK079E.\n\n**What must be done**\nInstall the shear pin following the instructions in either:\n* Piper Service Letter No. 695, **or**\n* Edo-Aire Mitchell Service Letter ML38\n\n**Compliance deadline**\nWithin 200 hours of flight time after 30 September 1974.\n\n**Why it matters**\nThis safety modification prevents potential autopilot malfunction, uncommanded control surface movement, or structural damage to the servo mechanism that could compromise aircraft control during flight."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation","history":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation/history","analysis":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation/analysis","conflicts":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation/conflicts","importantCases":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation/important-cases","documents":"/api/acts/ad-pa-23-65-automatic-pilot-roll-servo-shear-pin-installation/documents"}}