{"id":"F2005L00204","name":"AD/B737/112 - Yaw Damper Coupler Internal Rate Gyroscope - CANCELLED","slug":"ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":33716,"registerId":"commonwealth-F2005L00204-current","compilationNumber":null,"startDate":"2026-04-01","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 737 Series Aeroplanes","sectionType":"division","heading":"Boeing 737 Series Aeroplanes","content":"### Boeing 737 Series Aeroplanes\n\n| AD/B737/112 | Yaw Damper Coupler Internal Rate Gyroscope | 3/2005 |\n| ----------- | ------------------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 17 March 2005.                                                                                                                                                                        |\n| Background:  | The repetitive inspection requirements of this Directive have been terminated by the replacement of the single electro-mechanical rate gyro by a dual solid-state yaw rate sensor as required by AD/B737/123. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n4 February 2005","sortOrder":0},{"sectionNumber":"AD/B737/112","sectionType":"part","heading":"AD/B737/112","content":"## AD/B737/112","sortOrder":1},{"sectionNumber":"Yaw Damper Coupler Internal Rate Gyrosco","sectionType":"part","heading":"Yaw Damper Coupler Internal Rate Gyroscope","content":"## Yaw Damper Coupler Internal Rate Gyroscope","sortOrder":2},{"sectionNumber":"3/2005","sectionType":"part","heading":"3/2005","content":"## 3/2005","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1707},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the requirements of the original AD rather than expanding its scope. It represents a complete cancellation of the previous mandate, rendering the obligations nil rather than broadening them."},"complexity_factors":["Document contains fewer than 100 words of operative text","No defined terms or interpretation provisions","Single cross-reference to superseding instrument (AD/B737/123)","No conditional logic, exceptions, or procedural steps","Binary legal effect (cancelled/void)"],"plain_english_summary":"This **Airworthiness Directive (AD)** previously required owners and operators of Boeing 737 aircraft to conduct repetitive inspections of a specific flight stability component—the *yaw damper coupler internal rate gyroscope* (a spinning sensor that helps prevent the aircraft from swaying left and right during flight).\n\n**What has changed**\nThis directive has been **cancelled** effective 17 March 2005. The inspection requirements are no longer necessary because the old electro-mechanical gyroscopes have been replaced with modern dual solid-state sensors under a newer safety directive (AD/B737/123).\n\n**Who this affects**\nOwners and operators of Boeing 737 series aircraft who were previously subject to the repetitive inspection requirements of AD/B737/112.\n\n**Why it matters**\nThis cancellation removes a repetitive maintenance burden, acknowledging that the hardware upgrade made the old inspection regime obsolete."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled","history":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled/history","analysis":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled/analysis","conflicts":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled/conflicts","importantCases":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled/important-cases","documents":"/api/acts/ad-b737-112-yaw-damper-coupler-internal-rate-gyroscope-cancelled/documents"}}