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2010-24-05: Failure of the impeller

FAA order 2010-24-05 is an airworthiness directive in force since January 3, 2011. The FAA's subject line: Failure of the impeller. It names the Pratt & Whitney Canada PW305A, Pratt & Whitney Canada PW305B engines: about 121 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: Pratt & Whitney Canada Corp.
Models: PW305A, PW305B
Engine series: Pratt & Whitney Canada PW305A 116 aircraft
Pratt & Whitney Canada PW305B 5 aircraft

Dates and paperwork

In force since: January 3, 2011
Published: January 4, 2011 (signed November 10, 2010)
Docket: FAA-2010-0829
Status: Current
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 the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: As a result of a change in the low-cycle fatigue lifing methodology for the IMI 834 material, the recommended service life of certain PW305A and PW305B Impellers has been reduced, as published in the Airworthiness Limitations (AWL) section of Engine Maintenance Manual (EMM). The in-service life of impellers P/N 30B2185, 30B2486 and 30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N 30B4565-01 from 8,500 to 7,000 cycles. We are issuing this AD to prevent failure of the impeller, which could result in an uncontained event and possible damage to the airplane.

The order itself the regulatory text, as published

Show the full text (3,375 characters)

2010-24-05 Pratt & Whitney Canada Corp. (Formerly Pratt & Whitney Canada, Inc.): Amendment 39-16524. Docket No. FAA-2010-0829; Directorate Identifier 2010-NE-23-AD. 

Effective Date 

	(a) This airworthiness directive (AD) becomes effective January 3, 2011. 

Affected ADs 

	(b) None. 

Applicability 

	(c) This AD applies to Pratt & Whitney Canada Corp. (P&WC) PW305A and PW305B turbofan engines with certain impellers, part numbers (P/Ns) 30B2185, 30B2486, 30B2858-01, or 30B4565-01 installed. These engines are installed on, but not limited to, Hawker-Beech Corporation BAe.125 series 1000A, 1000B, and Hawker 1000 airplanes and Learjet Inc. Learjet 60 airplanes. 

Reason 

	(d) This AD results from: 

As a result of a change in the low-cycle fatigue lifing methodology for the IMI 834 material, the recommended service life of certain PW305A and PW305B Impellers has been reduced, as published in the Airworthiness Limitations (AWL) section of Engine Maintenance Manual (EMM). 

The in-service life of impellers P/N 30B2185, 30B2486 and 30B2858-01 has been reduced from 12,000 to 7,000 cycles; and of P/N 30B4565-01 from 8,500 to 7,000 cycles. 

We are issuing this AD to prevent failure of the impeller, which could result in an uncontained event and possible damage to the airplane. 

Actions and Compliance 

	(e) Unless already done, do the following actions. 
	(f) Within 30 days from the effective date of this AD, update AWL section of your PW305 EMM P/N 30B1402, to incorporate Pratt & Whitney Canada Corp. Temporary Revision (TR) AL-8, dated January 20, 2010, for compliance with the revised in-service limits for the affected Impellers, installed on PW305A and PW305B engine. 

FAA AD Differences 

	(g) None. 

Other FAA AD Provisions 

	(h) The following provisions also apply to this AD: 

Alternative Methods of Compliance (AMOCs) 

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

Related Information 

	(j) Refer to MCAI Transport Canada Airworthiness Directive CF- 2010-09, dated March 17, 2010, for related information. 

	(k) Contact James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: james.lawrence@faa.gov; phone: (781) 238-7176; fax: (781) 238-7199, for more information about this AD. 

Material Incorporated by Reference 

	(l) You must use Pratt & Whitney Canada Corp. Temporary Revision No. AL-8, dated January 20, 2010, to P&WC EMM P/N 30B1402 to do the actions required by this AD, unless the AD specifies otherwise. 
	(1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51. 
	(2) For service information identified in this AD, contact Pratt & Whitney Canada Corp., 1000 Marie-Victorin, Longueuil,Quebec, Canada J4G 1A1; telephone (800) 268-8000; fax (450) 647-2888; or go to: http://www.pwc.ca. 
	(3) You may review copies at the FAA, New England Region, 12 New England Executive Park, Burlington, MA; or 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 7, 2026. Connections as data: /graph/directive/2010-24-05.json · aircraft systems.