AD 2010-06-12R1

AD Final Rules - 2010-06-12R1.pdf
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AD Number:
2010-06-12R1
Document Type:
AD Final Rules
Docket Number:
FAA-2009-0948
Subject Heading:
Airworthiness Directives; Thielert Aircraft Engines GmbH Reciprocating Engines
Subject:
Rail pressure control valve
Status:
Current
Citation:
Federal Register Volume 76, Number 251 (Friday, December 30, 2011)
Citation Publish Date:
12/30/2011
Effective Date:
02/03/2012
Make:
Thielert Aircraft Engines GmbH
Model:
TAE 125-01 | TAE 125-02-99
Product Type:
Engine
Product Subtype:
Affected AD:
Superseded AD:
2010-06-12
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
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[Federal Register Volume 76, Number 251 (Friday, December 30, 2011)]


[Rules and Regulations]


[Pages 82110-82111]


From the Federal Register Online via the Government Printing Office [www.gpo.gov]


[FR Doc No: 2011-33514]


––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. FAA-2009-0948; Directorate Identifier 2009-NE-30-AD; Amendment 39-16906;


AD 2010-06-12R1]


RIN 2120-AA64


Airworthiness Directives; Thielert Aircraft Engines GmbH Reciprocating Engines


AGENCY:
 
Federal Aviation Administration (FAA), DOT.


ACTION:
 
Final rule.


––––––––––––––––––––––––––––––––––


SUMMARY:
 
We are revising an existing airworthiness directive (AD) for Thielert Aircraft Engines


GmbH models TAE 125-02-99 and TAE 125-01 reciprocating engines. That AD currently requires


replacing the existing rail pressure control valve with an improved rail pressure control valve. This


new AD requires the same actions but relaxes the initial compliance time from within 100 flight


hours to within 600 flight hours for TAE 125-01 reciprocating engines. This AD was prompted by the


determination that our AD was inadvertently more restrictive than European Aviation Safety Agency


AD 2008-0128. We are issuing this AD to prevent engine in-flight shutdown, possibly resulting in


reduced control of the aircraft.


DATES:
 
This AD is effective February 3, 2012.


ADDRESSES:
 
For service information identified in this AD, contact Thielert Aircraft Engines


GmbH, Platanenstrasse 14 D-09350, Lichtenstein, Germany; phone: 37204-696-0; fax: 37204-696-


55; email: engines.com">info@centurion-engines.com. You may review copies of the referenced


service information at the FAA, 12 New England Executive Park, Burlington, MA. For information


on the availability of this material at the FAA, call (781) 238-7125.


Examining the AD Docket


You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at


the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal


holidays. The AD docket contains this AD, the regulatory evaluation, any comments received, and


other information. The address for the Docket Office (phone: (800) 647-5527) is Document


Management Facility, U.S. Department of Transportation, Docket Operations, M-30, West Building


Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.


1
2


FOR FURTHER INFORMATION CONTACT:
 
Alan Strom, Aerospace Engineer, Engine


Certification Office, FAA, Engine & Propeller Directorate, 12 New England Executive Park,


Burlington, MA 01803; phone: (781) 238-7143; fax: (781) 238-7199; email: alan.strom@faa.gov.


SUPPLEMENTARY INFORMATION:


Discussion


We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to revise AD


2010-06-12, Amendment 39-16236 (75 FR 12439, March 16, 2010). That AD applies to the specified


products. The NPRM published in the Federal Register on October 18, 2011 (76 FR 64285). That


NPRM proposed to require relaxing the initial compliance time from within 100 flight hours to within


600 flight hours for TAE 125-01 reciprocating engines.


Comments


We gave the public the opportunity to participate in developing this AD. We received no


comments on the NPRM.


Clarification of the VRail Plug Modification


Since we issued the NPRM, we determined that the compliance paragraph describing the Vrail


plug modification needed clarification. We changed paragraph (e)(1)(i) in the AD to describe what


existing parts need to be removed and what part number needs to be installed.


Conclusion


We reviewed the relevant data and determined that air safety and the public interest require


adopting the AD with the change described previously.


Costs of Compliance


Based on the service information, we estimate that this AD will affect about 370 TAE 125-01


and TAE 125-02-99 reciprocating engines installed on products of U.S. registry. We also estimate


that it will take about 1.5 work-hours per engine to comply with this AD. The average labor rate is


$85 per work-hour. Required parts will cost about $500 per engine. Based on these figures, we


estimate the cost of the AD for initial replacement on U.S. operators to be $232,175.


Authority for This Rulemaking


Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety.


Subtitle I, Section 106, describes the authority of the FAA Administrator. Subtitle VII, Aviation


Programs, describes in more detail the scope of the Agency's authority.


We are issuing this rulemaking under the authority described in Subtitle VII, Part A, Subpart III,


Section 44701, ''General requirements.'' Under that section, Congress charges the FAA with


promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices,


methods, and procedures the Administrator finds necessary for safety in air commerce. This


regulation is within the scope of that authority because it addresses an unsafe condition that is likely


to exist or develop on products identified in this rulemaking action.