{"id":"F2006L00365","name":"AD/CFE 738/1 - High Pressure Rotor Components","slug":"ad-cfe-738-1-high-pressure-rotor-components","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116981,"registerId":"commonwealth-F2006L00365-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"CFE Company Turbine Engines - CFE 738 Se","sectionType":"division","heading":"CFE Company Turbine Engines - CFE 738 Series","content":"### CFE Company Turbine Engines - CFE 738 Series\n\n| AD/CFE 738/1 | High Pressure Rotor Components | 3/2006 |\n| ------------ | ------------------------------ | ------ |\n\n```html\n

Applicability:

CFE Company Model CFE738-1-1B turbofan engines.

Note 1: These engines installed on but not limited to the Dassault Aviation Falcon 2000 series aeroplanes.

Requirement:

1. Remove from service certain stage 4 and 5 blisks and impeller aft shafts prior to exceeding the new cyclic life limits as follows, and replace with serviceable parts:

Nomenclature

Part Number (P/N)

Cyclic Life Limit

Stage 4 and 5 Blisk

6079T74P08

6,700 cycles since new (CSN)

Impeller Aft Shaft

6079T80P04

5,100 CSN

\"\"

6079T80P05

2,160 CSN

\"\"

6079T80P06

7,100 CSN

\"\"

6079T80P07

7,100 CSN


Note 2: FAA AD 2000-23-12 Amdt 39-11982 refers.

Compliance:

At the limits detailed in Requirement 1 of this AD.

This Airworthiness Directive becomes effective on 16 March 2006.

\n```\n\n| Background: | This AD sets new life limits for certain HPC rotor components in all engines. This amendment is prompted by a reduction in the calculated service life of certain compressor rotor rotating parts to values below currently approved service lives. The actions specified by this AD are intended to prevent failure of certain HPC rotor components, which could result in an uncontained engine failure and damage to the aeroplane. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.002.png) \nJames Coyne \nDelegate of the Civil Aviation Safety Authority\n\n1 February 2006","sortOrder":0},{"sectionNumber":"AD/CFE 738/1","sectionType":"part","heading":"AD/CFE 738/1","content":"## AD/CFE 738/1","sortOrder":1},{"sectionNumber":"High Pressure Rotor Components","sectionType":"part","heading":"High Pressure Rotor Components","content":"## High Pressure Rotor Components","sortOrder":2},{"sectionNumber":"3/2006","sectionType":"part","heading":"3/2006","content":"## 3/2006","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: setting life limits for specific HPC rotor components in a single engine model. There is no evidence of scope creep — it does not expand to cover additional engine models, airframes, or unrelated systems."},"complexity_factors":["Single, clear requirement with no conditional exceptions or nested logic","Only 5 specific part numbers affected, listed in a straightforward table","No defined terms section — uses standard aviation terminology (cycles since new, blisk, impeller)","No cross-references to other legislation beyond a single reference to the corresponding FAA directive","Compliance deadline is absolute (at the specified cycle limits) with no alternative methods or phased compliance","Document is extremely short — essentially one table and two paragraphs of background"],"plain_english_summary":"This AD requires owners/operators of CFE Company CFE738-1-1B turbofan engines (commonly on Dassault Falcon 2000 jets) to replace specific high‑pressure compressor parts — stage 4/5 blisks and impeller aft shafts — before newly reduced cycle limits. \n\nIt corrects previously optimistic life estimates to prevent cracking and uncontained engine failure. Effective 16 March 2006."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD narrows allowable service lives by imposing reduced cyclic life limits for specified HPC rotor components versus previously approved lives, requiring earlier removal/replacement (Background; Requirement 1). This changes operating limits and increases maintenance/replacement obligations for affected engine operators (Requirement 1; Compliance)."},"complexity_factors":["Specificity of parts and part numbers requiring action (multiple P/Ns listed in Requirement 1).","Different cyclic life limits for each P/N require accurate cycle-count tracking (Requirement 1; Compliance).","Operational impact on engine maintenance schedules and inventory of serviceable spares.","Clear, prescriptive compliance mechanism with an effective date reduces regulatory discretion (Compliance; effective date 16 March 2006).","Cross-reference to FAA AD increases regulatory alignment and potential for dual compliance checks (Note 2 / background).","Safety rationale tied to recalculated fatigue lives (Background), creating a technical basis that operators must accept unless further engineering data is produced."],"plain_english_summary":"This Airworthiness Directive requires operators of CFE Company CFE738-1-1B turbofan engines (for example, on Dassault Falcon 2000 aircraft) to remove and replace specified stage‑4/5 blisks and impeller aft shafts before they exceed newly reduced cyclic life limits (Requirement 1). Operators must track cycles since new and bear the cost and logistics of replacement to comply (Compliance). The Civil Aviation Safety Authority (Delegate) issued the AD effective 16 March 2006 after recalculation showed shorter service lives (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components","history":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components/history","analysis":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components/analysis","conflicts":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components/conflicts","importantCases":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components/important-cases","documents":"/api/acts/ad-cfe-738-1-high-pressure-rotor-components/documents"}}