FAA orders · airworthiness directive · historical

2012-14-06: Released turbine blades and shrouds

FAA order 2012-14-06 is an airworthiness directive in force since August 14, 2012. The FAA's subject line: Released turbine blades and shrouds. It names the Rolls-Royce 250-C20, Rolls-Royce 250-C20B, Rolls-Royce 250-C20R/2 engines: about 281 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: Rolls-Royce Corporation
Models: 250-C20, 250-C20B, 250-C20R/2
Engine series: Rolls-Royce 250-C20 43 aircraft
Rolls-Royce 250-C20B 214 aircraft
Rolls-Royce 250-C20R/2 24 aircraft

Dates and paperwork

In force since: August 14, 2012
Published: July 10, 2012 (signed June 25, 2012)
Docket: FAA-2011-0961
Replaced by: 2015-02-22
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 certain Rolls-Royce Corporation (RRC) 250-C20, -C20B, and -C20R/2 turboshaft engines. This AD was prompted by seven cases reported of released turbine blades and shrouds, which led to loss of power and engine in- flight shutdowns (IFSDs). This AD requires a one-time visual inspection and fluorescent penetrant inspection (FPI) on certain 3rd and 4th stage turbine wheels for cracks in the turbine blades. We are issuing this AD to prevent failure of 3rd or 4th stage turbine wheel blades which could cause engine failure and damage to the airplane.

The order itself the regulatory text, as published

Show the full text (3,071 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): 

2012-14-06 Rolls-Royce Corporation (Formerly Allison Engine Company and Allison Gas Turbine Division of General Motors): Amendment 39- 17120; Docket No. FAA-2011-0961; Directorate Identifier 2011-NE-22- AD. 

(a) Effective Date 

	This AD is effective August 14, 2012. 

(b) Affected ADs 

	None. 

[[Page 40481]] 

(c) Applicability 

	This AD applies only to Rolls-Royce Corporation 250-C20, -C20B, and -C20R/2 turboshaft engines with 3rd stage turbine wheel, part number (P/N) 23065818, and 4th stage turbine wheel, P/N 23055944. 

(d) Unsafe Condition 

	This AD was prompted by seven cases reported of released turbine blades and shrouds, which led to loss of power and engine in-flight shutdowns. We are issuing this AD to prevent failure of 3rd or 4th stage turbine wheel blades which could cause engine failure and damage to the airplane. 

(e) Compliance 

	Comply with this AD within the compliance times specified, unless already done. 
	(1) Remove the 3rd stage turbine wheel, P/N 23065818, and the 4th stage turbine wheel, P/N 23055944, within 1,750-hours since last inspection. 
	(2) Perform a one-time visual inspection and a fluorescent penetrant inspection on the 3rd and 4th stage turbine wheels for cracks at the trailing edge of the turbine blades near the fillet at the rim. 
	(3) If any cracks in the trailing edge near the rim are detected, do not return the wheel to service. 

(f) Alternative Methods of Compliance (AMOCs) 

	The Manager, Chicago Aircraft 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 

	(1) For more information about this AD, contact John Tallarovic, Aerospace Engineer, Chicago Aircraft Certification Office, FAA, 2300 E. Devon Ave., Des Plaines, IL 60018; phone: 847-294-8180; fax: 847- 294-7834; email: john.m.tallarovic@faa.gov. 
	(2) Rolls-Royce Corporation Alert Commercial Engine Bulletin No. CEB-A-1407, Revision 1, dated February 7, 2011 and CEB-A-72-4098, Revision 1, dated February 7, 2011 (combined in one document) pertain to the subject of this AD. 
	(3) For service information identified in this AD, contact Rolls-Royce Corporation Customer Support, P.O. Box 420, Indianapolis, IN 46206-0420; phone: 888-255-4766 or 317-230-2720; fax: 317-230-3381; email: royce.com">helicoptercustsupp@rolls-royce.com, and Web site: www.rolls-royce.com. 
	(4) You may review copies of the referenced service information at the FAA, Engine & Propeller Directorate, 12New England Executive Park, Burlington, MA 01803. 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 5, 2026. Connections as data: /graph/directive/2012-14-06.json · aircraft systems.