{"id":"F2008L02890","name":"AD/PMC/49 - Propeller Blade Cracking - CANCELLED","slug":"ad-pmc-49-propeller-blade-cracking-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74785,"registerId":"commonwealth-F2008L02890-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Propellers - Variable Pitch - McCauley","sectionType":"division","heading":"Propellers - Variable Pitch - McCauley","content":"### Propellers - Variable Pitch - McCauley\n\n| AD/PMC/49 | Propeller Blade Cracking | 9/2008 |\n| --------- | ------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                     |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 28 August 2008.                                                                                                                                                                                                        |\n| Background:  | This AD detailed requirements in FAA AD 2006-15-01. The FAA has since issued AD 2008-08-01 which supersedes these and other FAA ADs. In response to those changes this AD is cancelled and the new requirements are now detailed in AD/PMC/52. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n16 July 2008","sortOrder":0},{"sectionNumber":"AD/PMC/49","sectionType":"part","heading":"AD/PMC/49","content":"## AD/PMC/49","sortOrder":1},{"sectionNumber":"Propeller Blade Cracking","sectionType":"part","heading":"Propeller Blade Cracking","content":"## Propeller Blade Cracking","sortOrder":2},{"sectionNumber":"9/2008","sectionType":"part","heading":"9/2008","content":"## 9/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1758},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates AD/PMC/49 entirely rather than expanding its regulatory scope. The original directive addressed propeller blade cracking in McCauley variable pitch propellers; this cancellation simply removes those requirements in favour of a consolidated replacement directive (AD/PMC/52) that reflects updated FAA standards."},"complexity_factors":["Cancellation instrument with no substantive operative provisions","Single cross-reference to superseding directive AD/PMC/52","No conditional logic, exceptions, or defined terms","Straightforward revocation of prior requirements without transitional arrangements"],"plain_english_summary":"This document officially cancels a previous aviation safety rule about airplane propeller cracks.\n\n**What it is:** Airworthiness Directive (AD) AD/PMC/49 previously required aircraft owners to inspect and fix cracking issues in McCauley variable-pitch propeller blades. This document cancels those requirements as of 28 August 2008.\n\n**Who it affects:** Owners and operators of aircraft fitted with affected McCauley propellers.\n\n**Why it matters:** The American aviation safety authority (FAA) issued a new, broader safety rule that replaces the old one. Australian authorities have replaced this cancelled directive with a new one (AD/PMC/52) that covers the updated requirements.\n\n**Bottom line:** You no longer need to follow the old rule (AD/PMC/49), but you must comply with the new replacement rule (AD/PMC/52) instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled","history":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled/history","analysis":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled/analysis","conflicts":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled/conflicts","importantCases":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled/important-cases","documents":"/api/acts/ad-pmc-49-propeller-blade-cracking-cancelled/documents"}}