FAA orders · airworthiness directive · current

2016-03-02: Torque conformation box (TCB)

FAA order 2016-03-02 is an airworthiness directive in force since March 15, 2016. The FAA's subject line: Torque conformation box (TCB). It names the Turbomeca (Safran) ARRIEL 2C, Turbomeca (Safran) ARRIEL 2C1, Turbomeca (Safran) ARRIEL 2C2, Turbomeca (Safran) ARRIEL 2S1, Turbomeca (Safran) ARRIEL 2S2 engines: about 106 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: Turbomeca S.A.
Models: Arriel 2C, Arriel 2C1, Arriel 2C2, Arriel 2S1, Arriel 2S2
Engine series: Turbomeca (Safran) ARRIEL 2C 10 aircraft
Turbomeca (Safran) ARRIEL 2C1 1 aircraft
Turbomeca (Safran) ARRIEL 2C2 8 aircraft
Turbomeca (Safran) ARRIEL 2S1 30 aircraft
Turbomeca (Safran) ARRIEL 2S2 57 aircraft

Dates and paperwork

In force since: March 15, 2016
Published: February 9, 2016 (signed February 2, 2016)
Docket: FAA-2015-3805
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 all Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines with modification TU34 or TU34A installed. This AD requires inspecting the torque conformation box (TCB) for correct resistance values and removing TCBs that fail inspection before further flight. This AD was prompted by TCB failures. We are issuing this AD to prevent failure of the TCB, loss of engine thrust control, and damage to the helicopter.

The order itself the regulatory text, as published

Show the full text (3,498 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): 

2016-03-02 Turbomeca S.A.: Amendment 39-18389; Docket No. FAA-2015- 3805; Directorate Identifier 2015-NE-28-AD. 

(a) Effective Date 

	This AD becomes effective March 15, 2016. 

(b) Affected ADs 

	None. 

(c) Applicability 

	This AD applies to Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines with modification TU34 or TU34A installed. 

(d) Reason 

	This AD was prompted by torque conformation box (TCB) failures. We are issuing this AD to prevent failure of the TCB, loss of engine thrust control, and damage tothe helicopter. 

(e) Actions and Compliance 

	Comply with this AD within the compliance times specified, unless already done. 
	(1) Within 600 engine flight hours (EFHs) or 6 months after the effective date of this AD, whichever occurs first, check the resistance values on the TCB. Use Accomplishment Instructions, paragraph 2.3.2 of Turbomeca S.A. Mandatory Service Bulletin 292 72 2860, Version A, dated July 15, 2015, to do the inspection. Repeat this inspection every 600 EFHs since last inspection. 
	(2) Remove before further flight any TCB that fails the inspection required by paragraph (e)(1) of this AD. 

(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. You may email your request to: ANE-AD-AMOC@faa.gov. 

(g) Related Information 

	(1) For more information about this AD, contact Brian Kierstead, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7772; fax: 781-238-7199; email: brian.kierstead@faa.gov. 

[[Page 6755]] 

	(2) Refer to MCAI European Aviation Safety Agency AD 2015-0177, dated August 25, 2015, for more information. You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-3805. 

(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) Turbomeca S.A. Mandatory Service Bulletin No. 292 72 2860, Version A, dated July 15, 2015. 
	(ii) Reserved. 
	(3) For Turbomeca S.A. service information identified in this AD, contact Turbomeca S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; fax: 33 (0)5 59 74 45 15. 
	(4) You may view this service information at FAA, Engine & Propeller Directorate, 1200 District Avenue, 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/2016-03-02.json · aircraft systems.