{"id":"F2006B11267","name":"AD/MAKILA/6 - Exhaust Pipe Replacement","slug":"ad-makila-6-exhaust-pipe-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":57059,"registerId":"commonwealth-F2006B11267-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\nTurbomeca Turbine Engines \\- Makila Series","sortOrder":0},{"sectionNumber":"AD/MAKILA/6 Exhaust Pipe Replacement 7/2","sectionType":"part","heading":"AD/MAKILA/6 Exhaust Pipe Replacement 7/2002","content":"# AD/MAKILA/6 Exhaust Pipe Replacement 7/2002\n\nApplicability: Makila 1A, 1A1 and 1A2 engines incorporating a TU200A modified exhaust pipe. Requirement: Replace the exhaust pipe ejector attachment tabs in accordance with Turbomeca Alert\n\nService Bulletin A298 72 0148 Update Number 1.\n\nCompliance with the requireme nts of this Directive constitutes a terminating action for the requirements of AD/MAKILA/5.\n\nNote: DGAC Airworthiness Directive 2002-124(A) refers.\n\nCompliance: Effective 11 July 2002; at next removal of the engine from the helicopter, but no later than 30 June 2003.\n\nThis Airworthiness Directive becomes effective on 11 July 2002.\n\nBackground: This directive has been issued to address reports of cracks being found in exhaust pipe ejector attachment tabs. Failure of the attachment tabs could result in the ejector becoming detached and contacting the main rotor or tail rotor. AD/MAKILA/5 is in issue to require an inspection of the tabs pending compliance with this Directive.\n\n![Signature of James Coyne Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nJames Coyne\n\nDelegate of the Civil Aviation Safety Authority 3 June 2002\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 19 June 2002.","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical defect in specific engine models. There is no evidence of scope creep; it targets exactly the safety issue described in the background (cracking exhaust pipe tabs) and provides a terminating action for the interim measure (AD/MAKILA/5)."},"complexity_factors":["Single, specific mechanical component targeted (exhaust pipe ejector attachment tabs)","Only three engine models affected (Makila 1A, 1A1, 1A2)","One clear compliance action: replacement per manufacturer service bulletin","Simple compliance deadline structure: effective date plus hard deadline (30 June 2003) with earlier trigger (next engine removal)","No nested exceptions, conditional logic, or extensive cross-references beyond the terminating action for previous AD/MAKILA/5","Short document (approximately 250 words)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of helicopters with Turbomeca Makila 1A/1A1/1A2 engines fitted with the TU200A modified exhaust pipe to replace the ejector attachment tabs per Turbomeca Alert Service Bulletin A298 72 0148 Update 1. It prevents cracked tabs from allowing the ejector to detach and strike rotors.\n\nThe AD took effect 11 July 2002 and must be complied with by 30 June 2003; compliance also cancels the earlier temporary inspection AD."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The Directive replaces the interim inspection requirement imposed by AD/MAKILA/5 with a mandatory replacement of the exhaust-pipe ejector attachment tabs per Turbomeca Service Bulletin A298 72 0148 Update 1. Applicability remains limited to Makila 1A/1A1/1A2 engines incorporating the TU200A modified exhaust pipe, and compliance is required at the next engine removal or by 30 June 2003."},"complexity_factors":["Narrow technical applicability: only Makila 1A/1A1/1A2 engines with a TU200A modified exhaust pipe are covered","Requires a specific maintenance action performed to a manufacturer's Alert Service Bulletin (technical procedure must be followed)","Compliance timing tied to operational event (next engine removal) or an absolute date (30 June 2003)","Interaction with prior AD (acts as terminating action for AD/MAKILA/5), creating a procedural dependency","Regulatory provenance: issued under CAR 1998 subregulation 39.1(1) by a CASA delegate (administrative enforcement and recordkeeping implications)"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of helicopters fitted with Turbomeca Makila 1A, 1A1 or 1A2 engines that have the TU200A modified exhaust pipe to replace the exhaust-pipe ejector attachment tabs following Turbomeca Alert Service Bulletin A298 72 0148 Update 1. CASA issued it because cracks in those tabs could allow the ejector to detach and strike the main or tail rotor. Operators must complete the replacement at the next engine removal or by 30 June 2003; completing it removes the interim inspection obligation from AD/MAKILA/5."}},"importantCases":[],"_links":{"self":"/api/acts/ad-makila-6-exhaust-pipe-replacement","history":"/api/acts/ad-makila-6-exhaust-pipe-replacement/history","analysis":"/api/acts/ad-makila-6-exhaust-pipe-replacement/analysis","conflicts":"/api/acts/ad-makila-6-exhaust-pipe-replacement/conflicts","importantCases":"/api/acts/ad-makila-6-exhaust-pipe-replacement/important-cases","documents":"/api/acts/ad-makila-6-exhaust-pipe-replacement/documents"}}