{"id":"F2007L02127","name":"AD/CF6/64 - Fuel Shroud Retaining Snap Ring","slug":"ad-cf6-64-fuel-shroud-retaining-snap-ring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67266,"registerId":"commonwealth-F2007L02127-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"General Electric Turbine Engines - CF6 S","sectionType":"division","heading":"General Electric Turbine Engines - CF6 Series","content":"### General Electric Turbine Engines - CF6 Series\n\n| AD/CF6/64 | Fuel Shroud Retaining Snap Ring | 8/2007 |\n| --------- | ------------------------------- | ------ |\n\n```html\n

Applicability:

This AD applies to the following General Electric Company (GE) CF6-80C2 series turbofan engines that have incorporated GE Service Bulletin (SB) No. CF6-80C2 S/B 73-0253, or were built with the drainless manifold configuration at the factory during production assembly, and, have one or more fuel shroud retaining rings, part number (P/N) J204P0084, installed:

CF6-80C2A1

CF6-80C2B1F

CF6-80C2A2

CF6-80C2B2F

CF6-80C2A3

CF6-80C2B4F

CF6-80C2A5

CF6-80C2B5F

CF6-80C2A8

CF6-80C2B6F

CF6-80C2A5F

CF6-80C2B6FA

CF6-80C2B1

CF6-80C2B7F

CF6-80C2B2

CF6-80C2B8F

CF6-80C2B4

CF6-80C2D1F

CF6-80C2B6

CF6-80C2L1F

This AD also applies to GE CF6-80E1A1, CF6-80E1A2, CF6- 80E1A3,
CF6-80E1A4, and CF6-80E1A4B turbofan engines that have incorporated GE SB No. CF6-80E1 S/B 73-0026, or were built with the drainless manifold configuration at the factory during production assembly, and, have one or more fuel shroud retaining rings, P/N J204P0084, installed.

Note 1: These engines are installed on, but not limited to, Airbus A300, A310, A330, Boeing 747, 767, and McDonnell Douglas MD11 aeroplanes.

Note 2: For reference, the following Table 1 lists fuel manifold production P/Ns.

\n```\n\n```html\n

Table 1.--Reference of Fuel Manifold Production P/Ns

CF6-80C2 Series Engines

Drained Fuel Manifold P/N

(left side)

Drainless Fuel Manifold P/N

(left side)

1303M31G04

\"\"

1303M31G06

\"\"

1303M31G07

\"\"

1303M31G08

\"\"

1303M31G10

1303M31G12

\"\"

\"\"

Drained Fuel Manifold P/N

(right side)

Drainless Fuel Manifold P/N

(right side)

1303M32G04

\"\"

1303M32G06

\"\"

1303M32G07

\"\"

1303M32G08

\"\"

1303M32G10

1303M32G12

\"\"

\"\"

CF6-80 E1 Series Engines

\"\"

Drained Fuel Manifold P/N

(left side)

Drainless Fuel Manifold P/N

(left side)

1700M34G01

1303M31G12

Drained Fuel Manifold P/N

(right side)

Drainless Fuel Manifold P/N

(right side)

1700M35G02

1303M32G12

Requirement:

Replace any fuel shroud retaining rings, P/N J204P0084, with a fuel shroud retaining snap ring, P/N 2186M12P01. Each engine has a total of 30 rings installed.

- For CF6-80C2 series engines, use paragraphs 3.A. through 3.C.(1)(b)2, of GE SB No. CF6-80C2 S/B 73-0337, Revision 3, dated 5 February 2007, to do the replacements.

\n```\n\n| | - For CF6-80E1 series engines, use paragraphs 3.A. through 3.C.(1)(b)2, of GE SB No. CF6-80E1 S/B 73-0075, Revision 1, dated 27 November 2006, to do the replacements.This AD requires no further action if the fuel shroud retaining snap rings were installed in the CF6-80C2 series engines before the effective date of this AD using GE SB No. CF6-80C2 S/B 73-0337, Revision 2, dated 11 January 2007; Revision 1, dated 19 April 2005; or the Original, dated 30 November 2004.Note 3: FAA AD 2007-11-20 Amdt 39-15077 dated 24 May 2007 refers. |\n| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Compliance: | At the next engine shop visit for any reason after the effective date of this AD, unless the actions have already been done. |\n| | This Airworthiness Directive becomes effective on 2 August 2007. |\n| Background: | This AD results from two events of external engine fuel leakage and a subsequent under-cowl engine fire. The issuing of this AD is intended to prevent an under-cowl engine fire and damage to the aeroplane during an engine high vibration event. |\n\n![](image.002.png) \nDavid Punshon \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2007","sortOrder":0},{"sectionNumber":"AD/CF6/64","sectionType":"part","heading":"AD/CF6/64","content":"## AD/CF6/64","sortOrder":1},{"sectionNumber":"Fuel Shroud Retaining Snap Ring","sectionType":"part","heading":"Fuel Shroud Retaining Snap Ring","content":"## Fuel Shroud Retaining Snap Ring","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The AD's scope is confined to CF6-80C2 and CF6-80E1 engines with the specified drainless fuel manifold or with SB incorporation and with P/N J204P0084 rings installed. The requirement is narrowly targeted to replace those rings at the next shop visit; the text gives no indication that the scope changed from its original stated purpose."},"complexity_factors":["Applicability limited to many specific engine variants (long CF6-80C2 and CF6-80E1 lists) requiring careful fleet identification.","Applicability conditional on prior incorporation of particular GE Service Bulletins or on factory drainless manifold configuration (requires record checks).","Multiple precise part numbers: old ring P/N J204P0084 and replacement snap ring P/N 2186M12P01; 30 rings per engine increases parts count and labour.","Procedural dependency on particular paragraphs of two different GE Service Bulletins and on particular revisions (operators must use correct SB revision and paragraphs).","Compliance timing is deferred to the next engine shop visit (a mandatory-but-deferrable requirement that affects maintenance scheduling and costs).","Cross-reference to FAA AD 2007-11-20 adds regulatory interdependence between authorities.","Implementation imposes direct costs on operators (parts and shop labour) and administrative burden to verify prior installations and SB revision history."],"plain_english_summary":"This Airworthiness Directive requires operators to replace fuel shroud retaining rings (P/N J204P0084) with a specified snap ring (P/N 2186M12P01) on certain GE CF6-80C2 and CF6-80E1 turbofan engines that were built with a drainless fuel manifold or that have incorporated specified GE service bulletins. The directive says the change (30 rings per engine) must be done following GE service‑bulletin procedures at the next engine shop visit and is described as intended to prevent under‑cowl engine fires after fuel leaks."},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive with a focused, single-purpose scope: addressing a specific mechanical defect in specific engine models. The scope remains tightly constrained to the fuel shroud retaining ring issue and has not expanded beyond its original safety intent."},"complexity_factors":["Multiple engine model variants listed (19 specific CF6-80C2 models plus 5 CF6-80E1 models)","Conditional applicability based on three factors: specific service bulletin incorporation, factory production configuration, and presence of specific part numbers","Cross-references to external GE Service Bulletins (SB CF6-80C2 S/B 73-0337 and SB CF6-80E1 S/B 73-0075) for detailed replacement procedures","Nested compliance exceptions: no action required if already done using specific earlier revisions of the service bulletins","Reference to corresponding FAA AD (2007-11-20) for additional context","Technical part number tables with 20+ specific part numbers for fuel manifolds"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacement of faulty fuel shroud retaining rings (P/N J204P0084) with improved snap rings (P/N 2186M12P01) on specified GE CF6-80C2 and CF6-80E1 engines. It affects operators and maintenance organisations of wide‑body aircraft powered by those engines and is intended to stop fuel leaks and under‑cowl fires caused by retaining‑ring failure.\n\nThe replacement must be done at the next scheduled engine shop visit after 2 August 2007 unless already completed under earlier approved service bulletins."},"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-cf6-64-fuel-shroud-retaining-snap-ring","history":"/api/acts/ad-cf6-64-fuel-shroud-retaining-snap-ring/history","analysis":"/api/acts/ad-cf6-64-fuel-shroud-retaining-snap-ring/analysis","conflicts":"/api/acts/ad-cf6-64-fuel-shroud-retaining-snap-ring/conflicts","importantCases":"/api/acts/ad-cf6-64-fuel-shroud-retaining-snap-ring/important-cases","documents":"/api/acts/ad-cf6-64-fuel-shroud-retaining-snap-ring/documents"}}