This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

19244 

Vol. 80, No. 69 

Friday, April 10, 2015 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–0482; Directorate 

Identifier 2015–NE–06–AD] 

RIN 2120–AA64 

Airworthiness Directives; GE Aviation 

Czech s.r.o. Turboprop 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 

serial number GE Aviation Czech s.r.o. 

M601E–11, M601E–11A, and M601F 

turboprop engines. This proposed AD 

was prompted by the determination that 

wear or cracking, and subsequent 

misalignment of the quill shaft of the 

engine and the power turbine (PT) shaft, 

may lead to rupture of the quill shaft, 

overspeed of the PT, and uncontained 

engine failure. This proposed AD would 

require inspection of the reduction 

gearbox and supporting cone. We are 

proposing this AD to prevent 

misalignment and rupture of the quill 

shaft, which could lead to overspeed of 

the PT, uncontained engine failure, and 

damage to the airplane. 

DATES: We must receive comments on 

this proposed AD by June 9, 2015. 

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. 

• 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 GE Aviation 

Czech s.r.o., Beranovy ́ch 65, 199 02 

Praha 9—Letnˇ any, Czech Republic; 

phone: +420 222 538 111; fax: +420 222 

538 222. 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. 

It is also available on the Internet at 

http://www.regulations.gov by searching 

for and locating Docket No. FAA–2015– 

0482. 

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– 

0482; 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 

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 NPRM. Send your comments to an 

address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2015–0482; Directorate Identifier 2015– 

NE–06–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this NPRM. We will consider 

all comments received by the closing 

date and may amend this NPRM 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 NPRM. 

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– 

0014, dated January 30, 2015 (referred to 

hereinafter as ‘‘the MCAI’’), to correct an 

unsafe condition for the specified 

products. The MCAI states: 

It has been identified that misalignment 

between the quill shaft of the engine and the 

Power Turbine (PT) shaft may lead to a 

rupture of the quill shaft. 

This condition, if not detected and 

corrected, could lead to overspeed of the PT 

and consequent uncontained engine failure, 

possibly resulting in damage to the aeroplane 

and injury to occupants and/or persons on 

the ground. 

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– 

0482. 

Related Service Information Under 1 

CFR Part 51 

We reviewed GE Aviation Czech s.r.o. 

Alert Service Bulletin (ASB) No. 

M601E–11/28, M601E–11A/15, M601F/ 

26, Revision 2, dated January 23, 2015. 

This service information describes 

procedures for inspecting the M601 

reduction gearbox and supporting cone. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or see ADDRESSES for 

other ways to access this service 

information. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of the Czech 

Republic, 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 inspection 


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Federal Register / Vol. 80, No. 69 / Friday, April 10, 2015 / Proposed Rules 19245 

of the reduction gearbox and supporting 

cone. 

Costs of Compliance 

We estimate that this proposed AD 

affects 16 engines installed on airplanes 

of U.S. registry. We also estimate that it 

would take about 112 hours per engine 

to comply with this proposed AD. The 

average labor rate is $85 per hour. 

Required parts cost about $21,376 per 

engine. Based on these figures, we 

estimate the cost of this proposed AD on 

U.S. operators to be $494,336. Our cost 

estimate is exclusive of possible 

warranty coverage. 

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), 

(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): 

GE Aviation Czech s.r.o. (Type Certificate 

previously held by WALTER Engines 

a.s., Walter a.s., and MOTORLET a.s.): 

Docket No. FAA–2015–0482; Directorate 

Identifier 2015–NE–06–AD. 

(a) Comments Due Date 

We must receive comments by June 9, 

2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to certain serial number 

(S/N) GE Aviation Czech s.r.o. M601E–11, 

M601E–11A, and M601F turboprop engines, 

as follows: 

(1) Model M601E–11: S/N 833244, 841289, 

852239, 861007, 881217, 884021, 892046, 

892219, 894018, 903028, 913038, and 

912023. 

(2) Model M601E–11A: S/N 902004 and 

883046. 

(3) Model M601F: S/N 912001 and 924002. 

(d) Reason 

This AD was prompted by the 

determination that wear or cracking, and 

subsequent misalignment of the quill shaft of 

the engine and the power turbine (PT) shaft, 

may lead to rupture of the quill shaft, 

overspeed of the PT, and uncontained engine 

failure. We are issuing this AD to prevent 

misalignment and rupture of the quill shaft, 

which could lead to overspeed of the PT, 

uncontained engine failure, and damage to 

the airplane. 

(e) Actions and Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(1) Within 300 flight hours, or six months 

after the effective date of this AD, whichever 

occurs first, inspect the reduction gearbox 

and supporting cone. Use Appendix 2, 

paragraph 4., Inspection, of GE Aviation 

Czech s.r.o. Alert Service Bulletin (ASB) No. 

M601E–11/28, M601E–11A/15, M601F/26, 

Revision 2, dated January 23, 2015, to do 

your inspection. 

(2) If any crack is detected on the quill 

shaft, PT shaft, or the supporting cone, or if 

the quill shaft or PT shaft involute spline 

wear exceeds 0.12 mm, then before further 

flight, replace each cracked or worn part with 

a part eligible for installation. 

(f) Credit for Previous Actions 

If you performed the actions of paragraphs 

(e)(1) and (e)(2) of this AD before the effective 

date of this AD using GE Aviation Czech 

s.r.o. ASB No. M601E–11/28, M601E–11A/

15, M601F/26, Revision 1, dated December 

23, 2014, or Initial Issue, dated June 27, 2014, 

you have met the requirements of this AD. 

(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 2015–0014, dated January 

30, 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–2015–0482. 

(3) GE Aviation Czech s.r.o. ASB No. 

M601E–11/28, M601E–11A/15, M601F/26, 

Revision 2, dated January 23, 2015, is copublished as one document with M601D/44, 

M601D–1/29, M601D–11NZ/18, M601E/59, 

and M601E–21/26, which are not 

incorporated by reference in this AD, can be 

obtained from GE Aviation Czech s.r.o., using 

the contact information in paragraph (h)(4) of 

this proposed AD. 

(4) For service information identified in 

this proposed AD, contact GE Aviation Czech 

s.r.o., Beranovy ́ch 65, 199 02 Praha 9— 

Letnˇ any, Czech Republic; phone: +420 222 

538 111; fax: +420 222 538 222. 

(5) 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. 

Issued in Burlington, Massachusetts, on 

March 27, 2015. 

Thomas A. Boudreau, 

Acting Directorate Manager, Engine & 

Propeller Directorate, Aircraft Certification 

Service. 

[FR Doc. 2015–07865 Filed 4–9–15; 8:45 am] 

BILLING CODE 4910–13–P 


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