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2009-14-01: Check valve piston

FAA order 2009-14-01 is an airworthiness directive in force since August 3, 2009. The FAA's subject line: Check valve piston. It names the Turbomeca (Safran) ARRIUS 2F engine: about 63 aircraft on the U.S. register today, 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: Turbomeca S.A.
Models: Arrius 2F
Engine series: Turbomeca (Safran) ARRIUS 2F 63 aircraft

Dates and paperwork

In force since: August 3, 2009
Published: June 29, 2009 (signed June 19, 2009)
Docket: FAA-2005-22039
Replaces: 2005-17-17R1
Status: Current
The FAA's document: Read the order on the FAA's site

The FAA's summary their words, unchanged

The FAA is superseding an existing airworthiness directive (AD) for Turbomeca S.A. Arrius 2F turboshaft engines that have not incorporated Turbomeca Modification Tf75. That AD currently requires replacing the O-ring on the check valve piston in the lubrication unit at repetitive intervals. This AD requires the same repetitive replacements and would require incorporating Modification Tf75 as terminating action to the repetitive O-ring replacements. Modification Tf75 replaces the check valve piston with a piston design not requiring an O-ring. This AD results from the European Aviation Safety Agency (EASA) and Turbomeca S.A. mandating the incorporation of Modification Tf75. We are issuing this AD to prevent an uncommanded in-flight shutdown of the engine, which could result in a forced autorotation landing and damage to the helicopter.

The order itself the regulatory text, as published

Show the full text (4,294 characters)

2009-14-01 Turbomeca S.A: Amendment 39-15950. Docket No. FAA-2005- 22039; Directorate Identifier 2005-NE-33-AD. 

Effective Date 

	(a) This airworthiness directive (AD) becomes effective August 3, 2009. 

Affected ADs 

	(b) This AD supersedes AD 2005-17-17R1, Amendment 39-14940. 

Applicability 

	(c) This AD applies to Turbomeca S.A. Arrius 2F turboshaft engines that have not incorporated modification Tf75. These engines are installed on, but not limited to, Eurocopter EC120B helicopters. 

Unsafe Condition 

	(d) This AD results from the European Aviation Safety Agency (EASA) and Turbomeca S.A. mandating the incorporation of Modification Tf75. The actions specified in this AD are intended to prevent an uncommanded in-flight shutdown of the engine, which could result in a forced autorotation landing and damage to the helicopter. 

Compliance 

	(e) You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done. 

O-ring Replacement 

	(f) Replace the O-ring on the check valve piston in the lubrication unit at the intervals specified in Table 1 of this AD. Use the Instructions to be Incorporated paragraphs 2.A. through 2.C.(2) of Turbomeca Alert Service Bulletin No. A319 79 4802, Update No. 1, dated April 3, 2006, to replace the O-ring. 

	Table 1--Compliance Times for O-ring Replacement


If the class of oil is:
Then replace the O-ring by the later of:
Thereafter, replace the O-ring within:
(1) HTS or unknown.
300 hours time-since-new (TSN) or 50 hours after March 21, 2007 (effective date of AD 2005-17-17R1).
300 hours time-since-last replacement (TSR).
(2) STD.
450 hours TSN or 50 hours after March 21, 2007 (effective date of AD 2005-17-17R1).
500 hours TSR.

Mandatory Terminating Action 

	(g) Within 150 flight hours after the effective date of this AD, do the following mandatory terminating action to the repetitive O- ring replacements: 
	(1) Incorporate Turbomeca Modification Tf75 by replacing the check valve piston in the lubrication unit, with a check valve piston requiring no O-ring. 
	(2) Use the Instructions to be Incorporated paragraphs 2.A. through 2.B.(1)(r) of Turbomeca Mandatory Service Bulletin No. 319 79 4075, Version B, dated May 14, 2008, to replace the check valve piston. 

Alternative Methods of Compliance 

	(h) The Manager, Engine Certification Office, FAA, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. 

Related Information 

	(i) EASA AD 2008-0170, dated September 25, 2008, also addresses the subject of this AD. 
	(j) Contact Turbomeca S.A., 40220 Tarnos, France; e-mail: noria- [email protected]; telephone 33 05 59 74 40 00, fax 33 05 59 74 45 15, or go to: http://www.turbomeca-support.com, for a copy of the service information identified in this AD. 
	(k) Contact James Lawrence, Aerospace Engineer, Engine Certification Office, FAA, Engine and Propeller Directorate, 12 New England Executive Park, Burlington, MA 01803; e-mail: [email protected]; telephone (781) 238-7176; fax (781) 238- 7199, for more information about this AD. 

Material Incorporated by Reference 

	(l) You must use the service information specified in the following Table 2 to perform the actions required by this AD. The Director of the Federal Register approved the incorporation by reference of the documents listed in the following Table 2 in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Turbomeca S.A., 40220 Tarnos, France; e-mail: [email protected]; telephone 33 05 59 74 40 00, fax 33 05 59 74 45 15, or go to: http:/ /www.turbomeca-support.com, for a copy of this service information. 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. 

	Table 2--Incorporation by Reference


Turbomeca Alert/MandatoryService Bulletin No.
Page
Update/Version
Date
A319 79 4802
Total Pages: 7
ALL
Update No. 1
April 3, 2006
319 79 4075
Total Pages: 9
ALL
Version B
May 14, 2008

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 30, 2026. Connections as data: /graph/directive/2009-14-01.json · aircraft systems.