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2011-07-01: Forward and aft centerbodies

FAA order 2011-07-01 is an airworthiness directive in force since April 22, 2011. The FAA's subject line: Forward and aft centerbodies. It names the General Electric CF6-45A2, General Electric CF6-50C, General Electric CF6-50C2, General Electric CF6-80 series engines: about 249 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.

What it applies to as the FAA lists it

Kind of product: Engine
Makes: General Electric Company
Models: CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6-50CA, CF6-50E, CF6-50E1, CF6-50E2, CF6-50E2B
Engine series: General Electric CF6-45A2 1 aircraft
General Electric CF6-50C 1 aircraft
General Electric CF6-50C2 10 aircraft
General Electric CF6-80 series 237 aircraft

Dates and paperwork

In force since: April 22, 2011
Published: March 18, 2011 (signed March 14, 2011)
Docket: FAA-2006-24145
Replaces: 2009-04-17
Status: Current
The FAA's document: Read the order on the FAA's site

The FAA's summary their words, unchanged

We are superseding an existing airworthiness directive (AD) for General Electric Company (GE) CF6-45 and CF6-50 series turbofan engines. That AD currently requires replacing certain forward and aft centerbodies of the long fixed core exhaust nozzle (LFCEN) assembly. This AD adds certain new forward and aft centerbody part numbers (P/Ns) to the list requiring replacement. This AD was prompted by the discovery of more LFCEN forward and aft centerbody P/Ns that require replacement. We are issuing this AD to prevent the forward and aft centerbody of the LFCEN assembly from separating from the engine, causing damage to the engine, and damage to the airplane.

The order itself the regulatory text, as published

Show the full text (3,200 characters)

2011-07-01 General Electric Company: Amendment 39-16638 ; Docket No. FAA-2006-24145; Directorate Identifier 2006-NE-06-AD. 

Effective Date 

	(a) This airworthiness directive (AD) is effective April 22, 2011. 

Affected ADs 

	(b) This AD supersedes AD 2009-04-17, Amendment 39-15823. 

Applicability 

	(c) This AD applies to the following engines with a long fixed core exhaust nozzle (LFCEN) assembly forward centerbody, part number (P/N) 1313M55G01 or G02, P/N 9076M28G05, G06, G08, G09, or G10, P/N 9076M82G01 or G03, and aft centerbody P/N 1313M56G01, or P/N 9076M46G02, G04, or G05, installed in: 
	(1) General Electric Company (GE) CF6-45A, CF6-45A2, CF6-50A, CF6-50C, CF6-50CA, CF6-50C1, CF6-50C2, CF6-50C2B, CF6-50C2D, CF6- 50E, CF6-50E1, CF6-50E2, and CF6-50E2B turbofan engines, including engines marked on the engine data plate as CF6-50C2-F and CF6-50C2- R. 
	(2) These engines are installed on, but not limited to, Airbus A300 series, Boeing 747-200B, 747-200C, 747-200F, 747-300 and 747SR, McDonnell Douglas DC-10-15, DC-10-30, DC-10-30F (KC-10A, KDC-10), and MD-10-30F airplanes. 

Unsafe Condition 

	(d) This AD was prompted by the discovery of more LFCEN forward and aft centerbody P/Ns that require replacement. We are issuing this AD to prevent the forward and aft centerbody of the LFCEN assembly from separating from the engine, causing damage to the engine, and damage to the airplane. 

Compliance 

	(e) Comply with this AD within the compliance times specified, unless already done. 
	(1) Within 18 months after the effective date of this AD, replace forward centerbody, P/N 1313M55G01 and G02, P/N 9076M28G05, G06, G08, G09, and G10, P/N 9076M82G01 and G03, and aft centerbody P/N 1313M56G01, P/N 9076M46G02, G04, and G05 with a forward and aft centerbody that has been modified using the Accomplishment Instructions, Section 3, of GE Service Bulletin (SB) No. CF6-50 S/B 78-0244, Revision 1, dated March 13, 2008, CF6-50 S/B 78-0244, dated July 30, 2007, or CF6-50 S/B 78-0242, dated September 26, 2005. 

Centerbody Installation Prohibition 

	(2) After 18 months from the effective date of this AD, do not install any engine with forward centerbody, P/N 1313M55G01 or G02, P/N 9076M28G05, G06, G08, G09, or G10, P/N 9076M82G01 or G03, or aft centerbody P/N 1313M56G01, P/N 9076M46G02, G04, or G05 on any airplane. 

Alternative Methods of Compliance (AMOCs) 

	(f) The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. 

Related Information 

	(g) For more information about this AD, contact Tomasz Rakowski, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate; phone: 781-238-7735; fax: 781-238-7199; e- mail: tomasz.rakowski@faa.gov. 
	(h) For service information identified in this AD, contact GE- Aviation M/D Rm. 285, One Neumann Way, Cincinnati, OH 45215, telephone 513-552-3272; e-mail: geae.aoc@ge.com. You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA. For information on the availability of this material at the FAA, call 781-238-7125.

Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 7, 2026. Connections as data: /graph/directive/2011-07-01.json · aircraft systems.