{"id":"F2006B11029","name":"AD/JT9D/36 - LPT 5th Stage Disc - Inspection","slug":"ad-jt9d-36-lpt-5th-stage-disc-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56637,"registerId":"commonwealth-F2006B11029-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\nPratt and Whitney Turbine Engines \\- JT9D Series","sortOrder":0},{"sectionNumber":"AD/JT9D/36 LPT 5th Stage Disc - Inspecti","sectionType":"part","heading":"AD/JT9D/36 LPT 5th Stage Disc - Inspection 7/2002","content":"# AD/JT9D/36 LPT 5th Stage Disc \\- Inspection 7/2002\n\nApplicability: Pratt and Whitney JT9D series engines as specified in FAA AD 2002-07-04. Requirement: Action in accordance with the requirements of FAA AD 2002-07-04.\n\nNote: FAA AD 2002-07-04 Amdt 39-12698 refers.\n\nCompliance: As detailed in the requirement document with a revised effective date of 11 July 2002.\n\nThis Airworthiness Directive becomes effective on 11 July 2002.\n\nBackground: In-complete blend repairs on LPT 5th stage disc has resulted in uncontained engine failure. Limitations and inspections mandated per this AD helps to prevent such failures.\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 29 May 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":{"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific safety defect in a specific engine component. It does not expand beyond the original safety purpose of preventing uncontained engine failures due to blend repair issues on the LPT 5th stage disc."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (FAA AD 2002-07-04)","No nested conditional logic — single straightforward requirement","No cross-references to other Australian legislation beyond the enabling regulation (CAR 1998 subregulation 39.1(1))","Adopts external technical standard by reference rather than reproducing it","Single compliance pathway with no exceptions or alternative methods stated"],"plain_english_summary":"This AD requires operators of certain Pratt & Whitney JT9D engines to perform the FAA-prescribed inspections and repairs on the 5th-stage Low Pressure Turbine disc. It responds to incomplete blend repairs that previously led to an uncontained engine failure, so complying operators must follow the FAA procedures adopted by reference. The directive takes effect 11 July 2002."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive adopts the requirements of FAA AD 2002-07-04 as its Requirement without adding new substantive obligations. The only alteration is a CASA-set compliance timetable (effective date revised to 11 July 2002). The applicability remains limited to the JT9D series and the actions to be taken are those specified in the referenced FAA AD."},"complexity_factors":["Narrow technical scope (applies only to Pratt & Whitney JT9D series engines; labelled in 'Applicability')","Incorporation by reference of an external regulator's AD (FAA AD 2002-07-04) increases dependency on an outside document for required actions ('Requirement')","Revised effective date imposed by CASA (11 July 2002) creates a specific compliance timetable ('Compliance')","Substantive inspection and repair details are not reproduced in this instrument, so operators must obtain and follow the FAA AD to know exact procedures (implementation burden)","Mandatory nature and enforcement under CAR 1998 subregulation 39.1(1) gives the CASA delegate regulatory authority (signed delegate statement)","Operational costs and maintenance scheduling implications for affected operators due to inspections/limitations (stated purpose in 'Background')"],"plain_english_summary":"This Airworthiness Directive requires operators of Pratt & Whitney JT9D engines to carry out the inspections and repair limitations set out in FAA AD 2002-07-04 for the low-pressure turbine (LPT) 5th-stage disc. CASA adopts the FAA requirements, fixes the compliance timetable (effective 11 July 2002), and states the measures are intended to prevent uncontained engine failures caused by incomplete blend repairs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection","history":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection/history","analysis":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection/analysis","conflicts":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection/conflicts","importantCases":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection/important-cases","documents":"/api/acts/ad-jt9d-36-lpt-5th-stage-disc-inspection/documents"}}