[4910-13-P]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-5193; Directorate Identifier 2015-NE-35-AD]

RIN 2120-AA64

Airworthiness Directives; Technify Motors GmbH Reciprocating Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

SUMMARY: We propose to adopt a new airworthiness directive (AD) for certain 

Technify Motors GmbH (type certificate previously held by Thielert Aircraft Engines 

GmbH) TAE 125-02-99 and TAE 125-02-114 reciprocating engines. This proposed AD 

was prompted by reports of in-flight shutdowns (IFSDs) on TAE 125-02 engines. This 

proposed AD would require removal of affected fuel feed pumps. We are proposing this 

AD to prevent failure of the fuel feed pump, which could result in damage to the engine 

and damage to the airplane.

DATES: We must receive comments on this proposed AD by [INSERT DATE 60 

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER].

ADDRESSES: You may send comments by any of the following methods:

 Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the 

instructions for submitting comments.
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 Mail: Docket Management Facility, U.S. Department of Transportation, 1200 

New Jersey Avenue SE., West Building Ground Floor, Room W12-140, Washington, DC 

20590-0001.

 Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal holidays.

 Fax: 202-493-2251.

For service information identified in this proposed AD, contact Technify Motors 

GmbH, Platanenstrasse 14, D-09356 Sankt Egidien, Germany, phone: +49-37204-696-0; 

fax: +49-37204-696-2912; email: support@continentaldiesel.de. You may view this

service information at the FAA, Engine & Propeller Directorate, 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 by

searching for and locating Docket No. FAA-2015-5193; or in person at the Docket 

Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal 

holidays. The AD docket contains this proposed AD, the mandatory continuing 

airworthiness information (MCAI), the regulatory evaluation, any comments received, 

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

ADDRESSES section. Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Philip Haberlen, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New England 
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Executive Park, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-7199; email: 

philip.haberlen@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to send any written relevant data, views, or arguments about this 

proposed AD. Send your comments to an address listed under the ADDRESSES section.

Include “Docket No. FAA-2015-5193; Directorate Identifier 2015-NE-35-AD” at the

beginning of your comments. We specifically invite comments on the overall regulatory, 

economic, environmental, and energy aspects of this proposed AD. We will consider all 

comments received by the closing date and may amend this proposed AD based on those

comments.

We will post all comments we receive, without change, to 

http://www.regulations.gov, including any personal information you provide. We will 

also post a report summarizing each substantive verbal contact with FAA personnel 

concerning this proposed AD.

Discussion

The European Aviation Safety Agency (EASA), which is the Technical Agent for 

the Member States of the European Community, has issued EASA AD 2015-0189, dated

September 21, 2015 (referred to hereinafter as “the MCAI”), to correct an unsafe 

condition for the specified products. The MCAI states:

In-flight shut down occurrences have been reported on aeroplanes 

equipped with TAE 125-02 engines. The initial results of the 

investigations showed that a defective fuel feed pump was the 

probable cause of the engine failure.
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You may obtain further information by examining the MCAI in the AD docket on 

the Internet at http://www.regulations.gov by searching for and locating Docket No. 

FAA-2015-5193.

Related Service Information

Technify Motors GmbH has issued Operation & Maintenance Manual, CD-135 / 

CD-155, OM-02-02, Issue 4, Revision No. 5, dated September 18, 2015. The service 

information describes procedures for removing and replacing the fuel feed pump.

FAA’s Determination and Requirements of This Proposed AD

This product has been approved by the aviation authority of Germany, and is

approved for operation in the United States. Pursuant to our bilateral agreement with the 

European Community, EASA has notified us of the unsafe condition described in the 

MCAI and service information referenced above. We are proposing this AD because we 

evaluated all information provided by EASA and determined the unsafe condition exists 

and is likely to exist or develop on other products of the same type design. This proposed 

AD would require removal of affected fuel feed pumps.

Costs of Compliance

We estimate that this proposed AD affects 190 engines installed on airplanes of 

U.S. registry. We also estimate that it would take about 0.5 hours per engine to comply

with this proposed AD. The average labor rate is $85 per hour. Pro-rated cost of life limit 

reduction would be about $160 per part. Based on these figures, we estimate the cost of 

the proposed AD on U.S. operators to be $38,475.
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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.

Regulatory Findings

We determined that this proposed AD would not have federalism implications 

under Executive Order 13132. This proposed AD would not have a substantial direct 

effect on the States, on the relationship between the national Government and the States, 

or on the distribution of power and responsibilities among the various levels of 

government.

For the reasons discussed above, I certify this proposed regulation:

(1) Is not a “significant regulatory action” under Executive Order 12866,

(2) Is not a “significant rule” under the DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979),
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(3) Will not affect intrastate aviation in Alaska to the extent that it justifies 

making a regulatory distinction, and

(4) Will not have a significant economic impact, positive or negative, on a 

substantial number of small entities under the criteria of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

The Proposed Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA 

proposes to amend 14 CFR part 39 as follows:

PART 39 - AIRWORTHINESS DIRECTIVES

1. The authority citation for part 39 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40113, 44701.

§ 39.13 [Amended]

2. The FAA amends § 39.13 by adding the following new airworthiness directive 

(AD):

Technify Motors GmbH (Type Certificate previously held by Thielert Aircraft 

Engines GmbH): Docket No. FAA-2015-5193; Directorate Identifier 2015-NE-35-AD.

(a) Comments Due Date

We must receive comments by [INSERT DATE 60 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER].

(b) Affected ADs

None.
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(c) Applicability

This AD applies to all Technify Motors GmbH (type certificate previously held 

by Thielert Aircraft Engines GmbH) TAE 125-02-99 and TAE 125-02-114 reciprocating 

engines with a fuel feed pump, part number (P/N) 05-7312-K0073xx, or P/N 05-7312-

K0133xx, where “xx” can be any number, installed.

(d) Reason

This AD was prompted by reports of in-flight shutdowns (IFSDs) on TAE 125-02 

engines. We are issuing this AD to prevent failure of the fuel feed pump, which could 

result in damage to the engine and damage to the airplane.

(e) Actions and Compliance

Comply with this AD within the compliance times specified, unless already done.

Remove from service each affected fuel feed pump before it exceeds 600 operating hours 

(OH) time in service (TIS) or within 110 OH after the effective date of this AD, 

whichever occurs later.

(f) Installation Prohibition

After the effective date of this AD, do not install onto any engine, any fuel feed 

pump, P/N 05-7312-K0073xx or P/N 05-7312-K0133xx, where “xx” can be any number, 

if the fuel feed pump has 600 hours or more TIS. If TIS of a fuel feed pump is unknown 

or has exceeded 600 hours TIS, then the fuel feed pump is not eligible for installation. 

Rebuilt, overhauled, or repaired fuel feed pumps and/or fuel feed pumps that lack a serial 

number, are not eligible for installation.
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(g) 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.

(h) Related Information

(1) For more information about this AD, contact Philip Haberlen, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 01803; phone: 781-238-7770; fax: 781-238-

7199; email: philip.haberlen@faa.gov.

(2) Refer to MCAI European Aviation Safety Agency AD 2015-0189, dated 

September 21, 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 it in 

Docket No. FAA-2015-5193.

(3) For service information identified in this proposed AD, contact Technify

Motors GmbH, Platanenstrasse 14, D-09356 Sankt Egidien, Germany; phone: +49-

37204-696-0; fax: +49-37204-696-2912; email: support@continentaldiesel.de.

(4) You may view this service information at the FAA, Engine & Propeller 

Directorate, 12 New England Executive Park, Burlington, MA. For information on the 

availability of this material at the FAA, call 781-238-7125.
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Issued in Burlington, Massachusetts, on December 18, 2015.

Ann C. Mollica,

Acting Directorate Manager, Engine & Propeller Directorate,

Aircraft Certification Service.