{"id":"F2007L04018","name":"AD/GENERAL/42 - Microphone/Compass Safe Distance - Modification - CANCELLED","slug":"ad-general-42-microphone-compass-safe-distance-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":160808,"registerId":"commonwealth-F2007L04018-current","compilationNumber":null,"startDate":"2026-04-04","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Aircraft - General","sectionType":"division","heading":"Aircraft - General","content":"### Aircraft - General\n\n| AD/GENERAL/42 | Microphone/CompassSafe Distance - Modification | 11/2007 |\n| ------------- | ---------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                  |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 25 October 2007.                                                                                                                                                                                                    |\n| Background:  | This AD was issued in 1968 to address the separation of microphone stowage. This AD was issued under CAR 37A. The justification to retain this AD under CASR Part 39 cannot be justified and cannot be considered a safety of flight issue. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n14 September 2007","sortOrder":0},{"sectionNumber":"AD/GENERAL/42","sectionType":"part","heading":"AD/GENERAL/42","content":"## AD/GENERAL/42","sortOrder":1},{"sectionNumber":"Microphone/CompassSafe Distance - Modifi","sectionType":"part","heading":"Microphone/CompassSafe Distance - Modification","content":"## Microphone/Compass  \nSafe Distance - Modification","sortOrder":2},{"sectionNumber":"11/2007","sectionType":"part","heading":"11/2007","content":"## 11/2007","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1894},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The directive has been completely cancelled, eliminating the original 1968 requirement for aircraft microphone/compass separation modifications. The scope has shifted from imposing a safety modification mandate to removing that regulatory obligation entirely."},"complexity_factors":["Document is extremely short (under 150 words)","No defined terms or interpretation section","Single straightforward operative provision (cancellation)","No conditional logic, exceptions, or cross-referencing schemes","Plain language background explanation included"],"plain_english_summary":"**What this does:** This document cancels an old aircraft safety rule that required modifications to keep microphones stored at a safe distance from compasses to prevent magnetic interference.\n\n**Who it affects:** Aircraft operators, pilots, and maintenance engineers who were previously required to comply with the 1968 microphone stowage separation rule.\n\n**Why it matters:** The Civil Aviation Safety Authority determined that this decades-old requirement was no longer justified as a safety-of-flight issue under modern aviation regulations. Cancelling the directive removes an outdated compliance burden from the aviation industry."}},"importantCases":[],"_links":{"self":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled","history":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled/history","analysis":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled/analysis","conflicts":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled/conflicts","importantCases":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled/important-cases","documents":"/api/acts/ad-general-42-microphone-compass-safe-distance-modification-cancelled/documents"}}