{"id":"F2006B05826","name":"AD/PA-32/31 - Automatic Pilot Servo Roll Shear Pin - Installation","slug":"ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135804,"registerId":"commonwealth-F2006B05826-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-32/31 - Automatic Pilot Servo Roll Shear Pin -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-32 (Cherokee Six) Series Aeroplanes\n\n \n\nAD/PA-32/31 Automatic Pilot Servo Roll Shear Pin - Installation 9/74\n\nApplicability: All models fitted with Edo-Aire Mitchell Automatic Pilot AK175. 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":1786},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains its original, narrow scope focused solely on the installation of a safety shear pin for a specific autopilot model. No expansion of regulatory reach or additional requirements beyond the original safety modification are evident."},"complexity_factors":["Single, discrete mechanical action required with no conditional branches or exceptions","Narrow applicability limited to one specific aircraft series with specific equipment fit (Edo-Aire Mitchell AK175)","Simple compliance deadline structure (fixed calendar date plus flight hours buffer)","Technical specifications delegated to external service letters rather than embedded in the legislative text"],"plain_english_summary":"**What this is:** A mandatory safety instruction (called an *Airworthiness Directive*) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations.\n\n**Who it affects:** Owners and operators of **Piper PA-32 (Cherokee Six) aircraft** that are fitted with an **Edo-Aire Mitchell Automatic Pilot Model AK175**.\n\n**What you must do:** Install a *shear pin* (a safety device designed to break under excessive force to protect the system) on the automatic pilot servo roll mechanism. The exact technical instructions are contained in two referenced service bulletins: Piper Service Letter No. 695 or Edo-Aire Mitchell Service Letter ML38.\n\n**When:** You must complete this installation within **200 hours of flight time** after 30 September 1974.\n\n**Why it matters:** This modification prevents potential failure or structural damage to the aircraft's autopilot system, ensuring flight safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation","history":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation/history","analysis":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation/analysis","conflicts":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation/conflicts","importantCases":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation/important-cases","documents":"/api/acts/ad-pa-32-31-automatic-pilot-servo-roll-shear-pin-installation/documents"}}