{"id":"F2006B05533","name":"AD/PA-24/34 - Automatic Pilot Roll Servo Shear Pin - Installation","slug":"ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":46437,"registerId":"commonwealth-F2006B05533-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-24/34 - Automatic Pilot Roll Servo Shear Pin -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-24 (Comanche) Series Aeroplanes\n\n \n\nAD/PA-24/34 Automatic Pilot Roll Servo Shear Pin - Installation\n\n\n9/74\n\n \n\nApplicability: All models fitted with Edo-Aire Mitchell Automatic Pilot AK066, AK083, AK083R, AK089, AK089R and AK065E.\n\n \n\nDocument: 1. Piper SL No. 695; or\n\n \n\n2. Edo-Aire Mitchell SL ML 38.\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":1617},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope addressing a specific safety defect in particular autopilot systems. It has not expanded beyond the single issue of shear pin installation for the specified aircraft and equipment combinations."},"complexity_factors":["Single, discrete mechanical modification with no conditional exceptions","Limited applicability restricted to specific aircraft model and six specific autopilot model numbers","Straightforward compliance deadline based on flight hours (time-in-service)","References external technical documents rather than embedding complex procedural steps","No defined terms section or cross-references to other legislative provisions"],"plain_english_summary":"This is a **mandatory safety notice** (called an Airworthiness Directive) for owners of Piper PA-24 Comanche aircraft fitted with specific Edo-Aire Mitchell autopilot systems (models AK066, AK083, AK083R, AK089, AK089R, or AK065E).\n\n**What it requires:**\nYou must install a **shear pin** (a safety device designed to break under pressure) in the autopilot's roll servo (the component that controls the aircraft's banking/turning motion).\n\n**Why it matters:**\nWithout this pin, if the autopilot malfunctions, it could jam the aircraft's roll controls—potentially making the aircraft uncontrollable. The shear pin ensures the autopilot can disconnect from the controls if it seizes up.\n\n**How to comply:**\n- **Check applicability:** Confirm your aircraft has one of the listed autopilot models.\n- **Follow the manual:** Use either *Piper Service Letter No. 695* or *Edo-Aire Mitchell Service Letter ML 38* for installation instructions.\n- **Deadline:** Complete the installation within 200 hours of flight time after 30 September 1974."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation","history":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation/history","analysis":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation/analysis","conflicts":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation/conflicts","importantCases":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation/important-cases","documents":"/api/acts/ad-pa-24-34-automatic-pilot-roll-servo-shear-pin-installation/documents"}}