{"id":"F2007L01054","name":"AD/JT9D/37 Amdt 1 - Inspection of Life Limited Parts","slug":"ad-jt9d-37-amdt-1-inspection-of-life-limited-parts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":65002,"registerId":"commonwealth-F2007L01054-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pratt and Whitney Turbine Engines - JT9D","sectionType":"division","heading":"Pratt and Whitney Turbine Engines - JT9D Series","content":"### Pratt and Whitney Turbine Engines - JT9D Series\n\n| AD/JT9D/37 Amdt 1 | Inspection of Life Limited Parts | 5/2007 |\n| ----------------- | -------------------------------- | ------ |\n\n| Applicability: | Pratt & Whitney (PW) JT9D-3A, -7, -7A, - 7H, -7AH, -7F, -7J, -20J, -59A, -70A,-7Q, -7Q3, -7R4D, -7R4D1, - 7R4E, -7R4E1, -7R4E4, -7R4G2, and -7R4H1 series turbofan engines.These engines are installed on, but not limited to, Boeing 747 and 767 series, McDonnell Douglas DC-10 series, and Airbus Industrie A300 and A310 series airplanes.                                                        |\n| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Unless already accomplished, amend the Engine - Time Limits - Airworthiness Limitation sections of the applicable Engine Manuals to include the inspection requirements per FAA AD 2007-05-17.Note: FAA AD 2007-05-17 Amendment 39-14978 refers. FAA AD 2007-05-17 supersedes FAA AD 2002-08-11 Amendment 39-12719.                                                                                   |\n| Compliance:    | Within 180 days after the effective date of this AD.                                                                                                                                                                                                                                                                                                                                                  |\n|                | This Amendment becomes effective on 10 May 2007.                                                                                                                                                                                                                                                                                                                                                      |\n| Background:    | FAA/Industry safety analysis of uncontained failures have identified the need for additional inspections of life limited components to prevent uncontained engine failures. Actions specified in this directive result from that analysis.The current amendment makes reference to the latest FAA Airworthiness Directive 2007-05-17.The original issue of this AD became effective on 8 August 2002. |\n\n![](image.001.png)  \nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n27 March 2007","sortOrder":0},{"sectionNumber":"AD/JT9D/37 Amdt 1","sectionType":"part","heading":"AD/JT9D/37 Amdt 1","content":"## AD/JT9D/37 Amdt 1","sortOrder":1},{"sectionNumber":"Inspection of Life Limited Parts","sectionType":"part","heading":"Inspection of Life Limited Parts","content":"## Inspection of Life Limited Parts","sortOrder":2},{"sectionNumber":"5/2007","sectionType":"part","heading":"5/2007","content":"## 5/2007","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 2002 directive. It simply updates the reference to the latest FAA airworthiness directive without expanding the types of engines covered or adding new categories of requirements."},"complexity_factors":["Single, clear requirement: amend engine manuals to reference FAA AD 2007-05-17","No defined terms section — uses plain technical language","No nested exceptions or conditional logic","Straightforward applicability table listing specific engine models","Single compliance deadline with no alternative methods or exceptions","Short document (approximately 300 words of substantive content)","Minimal cross-referencing (only to one FAA directive and its predecessor)"],"plain_english_summary":"This AD requires operators to update engine maintenance manuals to add inspections and limits for life‑limited parts on certain Pratt & Whitney JT9D engines used on specified Boeing, McDonnell Douglas and Airbus types. It affects aircraft operators and maintenance crews and adopts FAA AD 2007‑05‑17 to reduce the risk of uncontained engine failures. Compliance is required within 180 days of 10 May 2007."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment primarily updates the Australian directive to reference and require the inspections specified in FAA AD 2007-05-17, which supersedes the 2002 FAA AD. It does not materially broaden the set of affected engines or introduce new categories of regulated activity beyond updating inspection requirements. In practical terms the inspection content may have expanded compared with the original 2002 AD (the instrument states FAA/industry analysis identified the need for additional inspections), but this instrument functions as an alignment/update rather than a substantive expansion of scope beyond its original purpose of imposing life‑limited part inspection requirements for the listed JT9D variants."},"complexity_factors":["Single, focused operative requirement: amend Engine - Time Limits - Airworthiness Limitation sections to include FAA AD inspection requirements","Cross-reference to external instrument: mandatory incorporation of FAA AD 2007-05-17 (and notes it supersedes FAA AD 2002-08-11)","Applicability covers a long list of JT9D engine variants (many model suffixes), requiring operators to check applicability carefully","Clear, single compliance deadline: 180 days from the AD effective date","No multiple nested exceptions or extensive conditional logic within the text provided (straightforward compliance obligation)"],"plain_english_summary":"**What this instrument does (in simple terms)**\n\n- It requires operators of certain Pratt & Whitney JT9D turbofan engines to add specific inspections for \"life-limited\" engine parts into their engine maintenance manuals (the \"Engine - Time Limits - Airworthiness Limitation\" section).\n\n- The inspections to be added are those set out in the US FAA Airworthiness Directive (AD) 2007-05-17. The AD 2007-05-17 replaces an earlier FAA AD from 2002.\n\n- Operators must make this amendment to their engine manuals and start complying with the inspection regime within 180 days of the AD becoming effective (the instrument states an effective date of 10 May 2007).\n\n**Who is affected**\n\n- Airlines, aircraft operators, maintenance organisations and engineers who operate or maintain aircraft fitted with specified Pratt & Whitney JT9D engine variants. The instrument lists multiple JT9D model numbers (for example JT9D-3A, -7, -7A, -7H, -7F, -20J, -70A, -7R4E, -7R4G2 and others) and notes these engines are used on aircraft types including Boeing 747/767, McDonnell Douglas DC-10, and Airbus A300/A310.\n\n**Why it matters (stated reason and practical effect)**\n\n- The instrument cites an FAA/industry safety analysis that identified a need for additional inspections of life-limited components to reduce the risk of uncontained engine failures (an uncontained failure is when parts exit the engine casing). That is the stated safety purpose.\n\n- Mechanically, the rule changes what operators must record in their engine manuals and imposes a practical obligation to perform the inspections specified by the FAA AD. That will alter maintenance schedules and create immediate compliance work (amending manuals and scheduling inspections) and possibly lead to part removals or replacements if inspections find degraded components.\n\n**Who pays and who decides**\n\n- Who pays: the operators/owners of affected aircraft (airlines or lessors) bear the direct costs — updating manuals, performing inspections, any removal/repair/replacement of life-limited parts, and related aircraft downtime.\n\n- Who decides: the operator (or their approved maintenance organisation) must amend their Engine - Time Limits - Airworthiness Limitation section to include the FAA-mandated inspections and then carry out the inspections in accordance with that AD.\n\n**Implementation and compliance risks / trade-offs**\n\n- Compliance burden: operators must update manuals and ensure maintenance schedulers and engineers incorporate the new inspection intervals and methods. The 180-day deadline concentrates this work.\n\n- Operational effects: additional inspections increase maintenance labour and may increase aircraft downtime or parts consumption if inspections lead to earlier removals or replacements.\n\n- Supply and scheduling risk: if inspections reveal life-limited parts near the end of their lives, operators may face part availability issues, longer shop stays, or the need for unscheduled maintenance.\n\n- Benefit concentration: the safety benefit (reduced risk of uncontained failures) is concentrated on aircraft users and passengers and on the operators who avoid in-service engine events. The costs are borne directly by operators.\n\n**Where this instruction is found in the instrument**\n\n- Requirement: \"amend the Engine - Time Limits - Airworthiness Limitation sections of the applicable Engine Manuals to include the inspection requirements per FAA AD 2007-05-17.\" (listed under Requirement)\n\n- Compliance timing: \"Within 180 days after the effective date of this AD.\" (listed under Compliance)\n\n- Applicability: lists the specific JT9D engine variants and the aircraft types on which they are commonly installed (listed under Applicability)\n\n**Net practical effect**\n\nOperators of the listed JT9D engines must incorporate the inspection procedures and intervals specified in FAA AD 2007-05-17 into their official engine maintenance manuals and comply within the 180‑day window. The change updates an earlier 2002 requirement and is intended (per the instrument) to reduce the risk of uncontained engine part failures; it imposes routine administrative and maintenance costs on operators and may increase maintenance activity and parts replacement depending on inspection findings."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts","history":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts/history","analysis":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts/analysis","conflicts":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts/conflicts","importantCases":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts/important-cases","documents":"/api/acts/ad-jt9d-37-amdt-1-inspection-of-life-limited-parts/documents"}}