{"id":"F2008L04503","name":"AD/PA-30/27 - Automatic Pilot Roll Servo Shear Pin - Installation - CANCELLED","slug":"ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76541,"registerId":"commonwealth-F2008L04503-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-30 & 39 (Twin Comanche) Series ","sectionType":"division","heading":"Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes","content":"### Piper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\n| AD/PA-30/27 | Automatic Pilot Roll ServoShear Pin - Installation | 13/2008 |\n| ----------- | -------------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                          |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 18 December 2008.                                                                                                                                                                                                           |\n| Background:  | This unique Australian AD specified installation of a roll pin in the Edo-Aire Mitchell autopilot in accordance with Piper SL No. 695. Compliance was required within 200 hours time in service after September 1974. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n6 November 2008","sortOrder":0},{"sectionNumber":"AD/PA-30/27","sectionType":"part","heading":"AD/PA-30/27","content":"## AD/PA-30/27","sortOrder":1},{"sectionNumber":"Automatic Pilot Roll ServoShear Pin - In","sectionType":"part","heading":"Automatic Pilot Roll ServoShear Pin - Installation","content":"## Automatic Pilot Roll Servo  \nShear Pin - Installation","sortOrder":2},{"sectionNumber":"13/2008","sectionType":"part","heading":"13/2008","content":"## 13/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1151},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The instrument has shifted from imposing a mandatory safety requirement (the original 1974 AD requiring autopilot modifications) to simply removing that requirement entirely. The scope changed from affirmative installation obligations to a revocation/cancellation of previous rules."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Extremely short length (under 100 words of substantive content)","No procedural or administrative requirements"],"plain_english_summary":"This document **cancels a previous safety requirement** for specific aircraft.\n\n**What it does:**\n- Removes a rule that required owners of Piper PA-30 and PA-39 Twin Comanche aeroplanes to install a shear pin in their Edo-Aire Mitchell autopilot systems.\n- The original rule (from 1974) mandated installation of a roll pin within 200 hours of flying time.\n- As of 18 December 2008, that installation requirement no longer applies.\n\n**Who it affects:**\n- Owners and operators of Piper PA-30 and PA-39 (Twin Comanche) series aircraft who were previously subject to the original Airworthiness Directive.\n\n**Why it matters:**\n- Eliminates a maintenance obligation that is no longer considered necessary for aviation safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled","history":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled/history","analysis":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled/analysis","conflicts":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled/conflicts","importantCases":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled/important-cases","documents":"/api/acts/ad-pa-30-27-automatic-pilot-roll-servo-shear-pin-installation-cancelled/documents"}}