FAA orders · airworthiness directive · historical

2013-02-02: High-pressure turbine (HPT) disks

FAA order 2013-02-02 is an airworthiness directive in force since January 28, 2013. The FAA's subject line: High-pressure turbine (HPT) disks. It names the CFM International CFM56-3, CFM International CFM56-3B, CFM International CFM56-3C engines: about 14 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: CFM International, S.A.
Models: CFM56-3, CFM56-3B, CFM56-3C
Engine series: CFM International CFM56-3 1 aircraft
CFM International CFM56-3B 3 aircraft
CFM International CFM56-3C 10 aircraft

Dates and paperwork

In force since: January 28, 2013
Published: January 28, 2013 (signed January 14, 2013)
Docket: FAA-2012-1289
Replaced by: 2016-14-10
Status: Historical
The FAA's document: Read the order on the FAA's site

The FAA's summary their words, unchanged

We are adopting a new airworthiness directive (AD) for CFM International, S.A. CFM56-3, CFM56-3B, and CFM56-3C turbofan engines. This AD requires removal from service of certain high-pressure turbine (HPT) disks manufactured by Global Material Solutions of Pratt & Whitney, at reduced maximum life limits. This AD was prompted by a report of a forging process error during manufacture of these HPT disks. We are issuing this AD to prevent uncontained release of multiple turbine blades, damage to the engine, and damage to the airplane.

The order itself the regulatory text, as published

Show the full text (3,625 characters)

Adoption of the Amendment 

	Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: 

PART 39--AIRWORTHINESS DIRECTIVES 

0 1. The authority citation for part 39 continues to read as follows: 

	Authority:  49 U.S.C. 106(g), 40113, 44701. 

Sec.  39.13  [Amended] 

0 2. The FAA amends Sec.  39.13 by adding the following new airworthiness directive (AD): 

2013-02-02 CFM International, S.A.: Amendment 39-17323; Docket No. FAA-2012-1289; Directorate Identifier 2012-NE-43-AD. 

(a) Effective Date 

	This AD is effective January 28, 2013. 

(b) Affected ADs 

	None. 

(c) Applicability 

	This AD applies to CFM International, S.A. CFM56-3, CFM56-3B, and CFM56-3C turbofan engines, modified by Supplemental Type Certificate SE00034EN, with a high-pressure turbine (HPT) disk, part number (P/N) 880026, serial number (S/N) GLKBAA9307, GLKBAA9335, GLKBAA9404, GLKBAA9407, or GLKBAA9409, installed.(d) Unsafe Condition 

	This AD was prompted by a report of a forging process error during manufacture of these HPT disks. We are issuing this AD to prevent uncontained release of multiple turbine blades, damage to the engine, and damage to the airplane. 

(e) Compliance 

	Comply with this AD within the compliance times specified, unless already done. 
	(1) For CFM56-3, CFM56-3B, and CFM56-3C turbofan engines operating to 20,100 lbs maximum takeoff (MTO) thrust, remove the HPT disk from service on or before accumulating 8,000 cycles-since-new (CSN). 
	(2) For CFM56-3B and CFM56-3C turbofan engines operating to 22,100 lbs MTO thrust, remove the HPT disk from service on or before accumulating 8,000 CSN. 
	(3) For CFM56-3C turbofan engines operating to 23,500 lbs MTO thrust, remove the HPT disk from service on or before accumulating 4,000 CSN. 
	(4) For HPT disks that have been used in multiple models or thrust installations, the formula in the ADDED DATA section of Pratt& Whitney Special Instruction 6F-12 dated December 21, 2012 must be used to calculate the remaining life on the disk. 

(f) Alternative Methods of Compliance (AMOCs) 

	The Manager, Engine Certification Office, FAA, may approve AMOCs for this AD. Use the procedures found in 14 CFR 39.19 to make your request. 

(g) Related Information 

	For more information about this AD, contact Kenneth Steeves, Aerospace Engineer, Engine Certification Office, FAA, 12 New England Executive Park, Burlington, MA 01803; phone: 781-238-7765; fax: 781- 238-7199; email: kenneth.steeves@faa.gov. 

(h) Material Incorporated by Reference 

	(1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. 
	(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. 
	(i) Pratt & Whitney Corp. Special Instruction No. 6F-12, dated December 21, 2012. 
	(ii) Reserved. 
	(3) For service information identified in this AD, contact Pratt & Whitney, 400 Main St., East Hartford, CT 06108; phone: 860-565- 7700; fax: 860-565-1605. 
	(4) You may view this 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. 
	(5) You may view this service information at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

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 5, 2026. Connections as data: /graph/directive/2013-02-02.json · aircraft systems.