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

77411 

Vol. 79, No. 247 

Wednesday, December 24, 2014 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–1100; Directorate 

Identifier 2009–NE–37–AD] 

RIN 2120–AA64 

Airworthiness Directives; International 

Aero Engines AG Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to supersede 

airworthiness directive (AD) 2012–09– 

09 that applies to all International Aero 

Engines AG (IAE) V2500–A1, V2525– 

D5, and V2528–D5 turbofan engines, 

and certain serial numbers (S/Ns) of IAE 

V2522–A5, V2524–A5, V2527–A5, 

V2527E–A5, V2527M–A5, V2530–A5, 

and V2533–A5 turbofan engines. AD 

2012–09–09 currently requires cleaning, 

eddy current inspection (ECI) or 

fluorescent penetrant inspection (FPI), 

and initial and repetitive ultrasonic 

inspections (USIs) of certain highpressure compressor (HPC) stage 3 to 8 

drums, as well as replacement of the 

drum attachment nuts. Since we issued 

AD 2012–09–09, we discovered that 

additional attachment nuts for certain 

HPC stage 3 to 8 drums are affected. 

This proposed AD would expand the 

affected population for initial and 

repetitive USIs of the HPC stage 3 to 8 

drum, revise the inspection intervals, 

require removal of the affected 

attachment nuts and any HPC stage 3 to 

8 drum found cracked, and require a 

mandatory terminating action. We are 

proposing this AD to prevent failure of 

the HPC stage 3 to 8 drum, which could 

result in uncontained drum failure, 

damage to the engine, and damage to the 

airplane. 

DATES: We must receive comments on 

this proposed AD by February 23, 2015. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE., 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this NPRM, contact International Aero 

Engines AG, 400 Main Street, East 

Hartford, CT 06118; phone: 860–368– 

3700; fax: 860–368–4600; email: 

iaeinfo@iaev2500.com; Internet: https:// 

www.iaeworld.com. 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–2009– 

1100; 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 NPRM, the regulatory 

evaluation, any comments received, and 

other information. The street 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: 

Martin Adler, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7157; fax: 781–238– 

7199; email: martin.adler@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– 

2009–1100; Directorate Identifier 2009– 

NE–37–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 

because of 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 we receive 

about this NPRM. 

Discussion 

On May 2, 2012, we issued AD 2012– 

09–09, Amendment 39–17044 (77 FR 

30371, May 23, 2012), (‘‘AD 2012–09– 

09’’), for all IAE V2500–A1, V2525–D5, 

and V2528–D5 turbofan engines, and 

certain S/Ns of IAE V2522–A5, V2524– 

A5, V2527–A5, V2527E–A5, V2527M– 

A5, V2530–A5, and V2533–A5 turbofan 

engines. AD 2012–09–09 requires 

cleaning, ECI or FPI, and initial and 

repetitive USIs of certain HPC stage 3 to 

8 drums, as well as replacement of the 

drum attachment nuts. AD 2012–09–09 

resulted from inspections that found 50 

HPC drums with cracks and reports that 

indicated that the required inspection 

intervals were not adequate. We issued 

AD 2012–09–09 to prevent uncontained 

failure of the HPC stage 3 to 8 drum, 

which could result in damage to the 

airplane. 

Actions Since AD 2012–09–09 Was 

Issued 

Since we issued AD 2012–09–09, we 

discovered that partially silver-plated 

nuts for certain HPC stage 3 to 8 drums 

cause the drum to corrode and crack. 

IAE has also developed a new nut 

design without silver plating. 

Relevant Service Information 

We reviewed IAE Alert NonModification Service Bulletin (NMSB) 

No. V2500–ENG–72–0615, Revision 6, 

dated September 4, 2014; IAE NMSB 

No. V2500–ENG–72–0625, dated 

September 20, 2011; and IAE NMSB No. 

V2500–ENG–72–0637, dated May 2, 

2013. IAE Alert NMSB No. V2500– 

ENG–72–0615 describes procedures for 

performing a USI of the HPC stage 3 to 

8 drum. IAE NMSB No. V2500–ENG– 

72–0625 provides guidance on 

performing an ECI that will improve the 

ability to detect cracked HPC stage 3 to 

8 drums. IAE NMSB No. V2500–ENG– 

72–0637 describes procedures for 

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77412 Federal Register / Vol. 79, No. 247 / Wednesday, December 24, 2014 / Proposed Rules 

performing an FPI of the HPC stage 3 to 

8 drum. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would expand the 

affected population for initial and 

repetitive USIs of the HPC stage 3 to 8 

drum, revise the inspection intervals, 

require removal of affected attachment 

nuts, and require removal of any HPC 

stage 3 to 8 drums found cracked. As 

mandatory terminating action, this 

proposed AD would require installation 

of an HPC stage 3 to 8 drum that has 

never operated with silver-plated nuts 

using silver-free nuts to attach the HPC 

stage 3 to 8 drum to the HPC stage 9 to 

12 drum. 

Costs of Compliance 

We estimate that this proposed AD 

affects 956 engines installed on 

airplanes of U.S. registry. We estimate 

that it would take about 3 hours per 

engine to perform the USI and about 2 

hours per engine to perform the FPI or 

ECI of the HPC stage 3 to 8 drum. We 

also estimate that removing silver 

residue from the HPC stage 3 to 8 drum 

would cost about $2,600 per engine, and 

required parts would cost about $1,060 

per engine. We estimate the pro-rated 

replacement cost to replace an HPC 

stage 3 to 8 drum to be $52,014. Based 

on these figures, we estimate the cost of 

this proposed AD on U.S. operators to 

be $53,630,644. 

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 have 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 that the 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 

removing airworthiness directive (AD) 

2012–09–09, Amendment 39–17044 (77 

FR 30371, May 23, 2012), and adding 

the following new AD: 

International Aero Engines AG: Docket No. 

FAA–2009–1100; Directorate Identifier 

2009–NE–37–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

AD action by February 23, 2015. 

(b) Affected ADs 

This AD replaces AD 2012–09–09, 

Amendment 39–17044 (77 FR 30371, May 23, 

2012). 

(c) Applicability 

This AD applies to: 

(1) All International Aero Engines AG (IAE) 

V2500–A1 turbofan engines; and 

(2) All IAE V2525–D5 and V2528–D5 

turbofan engines; and 

(3) IAE V2522–A5, V2524–A5, V2527–A5, 

V2527E–A5, V2527M–A5, V2530–A5, and 

V2533–A5 turbofan engines with serial 

numbers (S/Ns) V10001 through V13190, and 

V15001 through V16728, excluding V16707. 

(d) Unsafe Condition 

This AD was prompted by the discovery 

that additional attachment nuts for certain 

HPC stage 3 to 8 drums cause the drum to 

corrode and crack. We are issuing this AD to 

prevent failure of the HPC stage 3 to 8 drum, 

which could result in uncontained drum 

failure, damage to the engine, and damage to 

the airplane. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. Use paragraph 3.A. of IAE Alert NonModification Service Bulletin (NMSB) No. 

V2500–ENG–72–A0615, Revision 6, dated 

September 4, 2014, to do the ultrasonic 

inspection (USI) required by this AD. You 

may use the inspections listed in paragraph 

(g)(3) of this AD instead of a USI for the 

initial inspection required by paragraphs 

(e)(1) through (e)(5) of this AD. If cracks are 

found during any of the inspections required 

by this AD, remove the drum from service 

before further flight. 

(1) Initial USI of the HPC stage 3 to 8 

drum—Group ‘‘A’’ and Group ‘‘B’’: 

For IAE V2500–A1 turbofan engines with 

S/Ns listed in ‘‘Group A’’ or ‘‘Group B’’ in 

paragraph 1.E. in IAE Alert NMSB No. 

V2500–ENG–72–A0615, Revision 6, dated 

September 4, 2014, perform an initial USI of 

the HPC stage 3 to 8 drum within 200 cycles 

of accumulating 8,000 cycles-since-new 

(CSN) or within 200 cycles from the effective 

date of this AD, whichever occurs later. 

(2) Initial USI of the HPC stage 3 to 8 

drum—Group ‘‘C’’: 

For IAE V2500–A5 turbofan engines with 

S/Ns listed in ‘‘Group C’’ in paragraph 1.E. 

in IAE Alert NMSB No. V2500–ENG–72– 

A0615, Revision 6, dated September 4, 2014, 

perform an initial USI of the HPC stage 3 to 

8 drum within 200 cycles of accumulating 

6,250 CSN or within 200 cycles from the 

effective date of this AD, whichever occurs 

later. 

(3) Initial USI of the HPC stage 3 to 8 

drum—Group ‘‘D’’: 

For IAE V2500–A5 turbofan engines with 

S/Ns listed in ‘‘Group D’’ in paragraph 1.E. 

in IAE Alert NMSB No. V2500–ENG–72– 

A0615, Revision 6, dated September 4, 2014, 

perform an initial USI of the HPC stage 3 to 

8 drum within 200 cycles of accumulating 

3,750 CSN or within 200 cycles from the 

effective date of this AD, whichever occurs 

later. 

(4) Initial USI of the HPC stage 3 to 8 

drum—Group ‘‘E’’: 

For IAE V2500–A1, -A5, and –D5 turbofan 

engines not listed in ‘‘Group A,’’ ‘‘Group B,’’ 

‘‘Group C,’’ or ‘‘Group D,’’ and with drum 

assembly part numbers (P/Ns) listed in 

‘‘Group E’’ in paragraph 1.E. in IAE Alert 

NMSB No. V2500–ENG–72–A0615, Revision 

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Federal Register / Vol. 79, No. 247 / Wednesday, December 24, 2014 / Proposed Rules 77413 

6, dated September 4, 2014, perform an 

initial USI of the HPC stage 3 to 8 drum 

within 200 cycles of accumulating 12,500 

CSN or within 200 cycles from the effective 

date of this AD, whichever occurs later. 

(5) Initial USI of the HPC stage 3 to 8 

drum—Group ‘‘F’’: 

For IAE V2500–A1, –A5, and –D5 turbofan 

engines not listed in ‘‘Group A,’’ ‘‘Group B,’’ 

‘‘Group C,’’ or ‘‘Group D,’’ and with drum 

assembly P/Ns listed in ‘‘Group F’’ in 

paragraph 1.E. in IAE Alert NMSB No. 

V2500–ENG–72–A0615, Revision 6, dated 

September 4, 2014, perform an initial USI of 

the HPC stage 3 to 8 drum within 200 cycles 

of accumulating 9,000 CSN or within 200 

cycles from the effective date of this AD, 

whichever occurs later. 

(f) Repetitive USIs of the HPC Stage 3 to 8 

Drum 

(1) For engines included in ‘‘Group A,’’ 

‘‘Group B,’’ ‘‘Group C,’’ ‘‘Group E,’’ or 

‘‘Group F,’’ as defined in paragraph (e) of this 

AD, perform repetitive USIs of the HPC stage 

3 to 8 drum within every 750 cycles of the 

last USI. 

(2) For engines included in ‘‘Group D,’’ as 

defined in paragraph (e) of this AD, perform 

repetitive USIs of the HPC stage 3 to 8 drum 

within every 500 cycles of the last USI. 

(3) If you inspect the HPC stage 3 to 8 drum 

at shop visit, you may delay the next USI as 

shown in the ‘‘Grace Periods Table’’ for each 

compliance group listed in paragraph 1.E. in 

IAE Alert NMSB No. V2500–ENG–72–A0615, 

Revision 6, dated September 4, 2014. 

(g) Removal of Silver-Plated Nuts 

Unless already done, at the next piece-part 

exposure of the HPC stage 3 to 8 drum after 

the effective date of this AD, do the following 

before returning any HPC stage 3 to 8 drum 

to service: 

(1) Remove from service all silver-plated 

nuts (fully or partially-plated), P/Ns AS44862 

or AS64367, that attach the HPC stage 3 to 

8 drum to the HPC stage 9 to 12 drum. 

(2) Remove the silver residue from the HPC 

stage 3 to 8 drum. 

(3) Perform an inspection of the HPC stage 

3 to 8 drum using at least one of the 

following methods: 

(i) Fluorescent penetrant inspection (FPI) 

of the HPC stage 3 to 8 drum for cracks, or 

(ii) Eddy current inspection (ECI) of the 

HPC stage 3 to 8 drum for cracks. 

(h) Installation Prohibition 

After the effective date of this AD, do not 

install any silver-plated nuts, P/N AS44862 

or AS64367, into any engine. 

(i) Mandatory Terminating Action 

Within 9,450 cycles after the effective date 

of this AD, install: 

(1) an HPC stage 3 to 8 drum that has never 

operated with silver-plated nuts (fully or 

partially plated) to attach the HPC stage 3 to 

8 drum to the HPC stage 9 to 12 drum, with 

(2) silver-free nuts to attach the HPC stage 

3 to 8 drum to the HPC stage 9 to 12 drum. 

(j) Definition 

For the purpose of this AD, ‘‘piece-part 

exposure’’ is removal of the HPC stage 3 to 

8 drum from the engine, removal of all blades 

from the drum, and separation of the HPC 

stage 3 to 8 drum from the stage 9 to 12 

drum. 

(k) Credit for Previous Actions 

If you performed an inspection of the HPC 

stage 3 to 8 drum before the effective date of 

this AD using one of the following IAE 

NMSBs, you met the initial inspection 

requirement of paragraph (e) of this AD: 

(i) IAE NMSB No. V2500–ENG–72–0594, 

Revision 3, dated August 7, 2009, through 

Revision 6, dated April 12, 2010. 

(ii) IAE NMSB No. V2500–ENG–72–0603, 

Revision 2, dated March 17, 2010, or earlier 

revisions. 

(iii) IAE NMSB No. V2500–ENG–72–0608, 

Revision 3, dated September 20, 2011, or 

earlier revisions. 

(iv) IAE NMSB No. V2500–ENG–72–0615, 

Revision 5, dated August 5, 2014, or earlier 

revisions. 

(v) IAE NMSB No. V2500–ENG–72–0638, 

Initial Issue, dated April 11, 2013. 

(l) 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. 

(m) Related Information 

(1) For more information about this AD, 

contact Martin Adler, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7157; fax: 781–238–7199; 

email: martin.adler@faa.gov. 

(2) IAE NMSB No. V2500–ENG–72–0637, 

dated May 2, 2013; IAE NMSB No. V2500– 

ENG–72–0625, dated September 20, 2011; 

IAE Engine Manual Task 72–41–11–200–001; 

and IAE Engine Manual Task 72–41–11–110– 

001, which are not incorporated by reference 

in this AD, can be obtained from IAE, using 

the contact information in paragraph (m)(3) 

of this proposed AD. IAE NMSB No. V2500– 

ENG–72–0637 and IAE Engine Manual Task 

72–41–11–200–001 provide guidance on 

performing the FPI. Guidance on performing 

the ECI can be found in IAE NMSB No. 

V2500–ENG–72–0625. IAE Engine Manual 

Task 72–41–11–110–001 provides guidance 

on cleaning the HPC stage 3 to 8 drum. 

(3) For service information identified in 

this AD, contact International Aero Engines 

AG, 400 Main Street, East Hartford, CT 

06118; phone: 860–368–3700; fax: 860–368– 

4600; email: iaeinfo@iaev2500.com; Internet: 

https://www.iaeworld.com. 

(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. 

Issued in Burlington, Massachusetts, on 

December 16, 2014. 

Colleen M. D’Alessandro, 

Assistant Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2014–30194 Filed 12–23–14; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 65 

[Docket No. FAA–2014–0820] 

Establishment of Policy Regarding 

Aircraft Dispatcher Certification 

Courses 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of availability of 

proposed FAA Order 8900.1 Volume 3, 

Chapter 63, Aircraft Dispatcher 

Certification Courses and Proposed 

Advisory Circular (AC) 65–XX (Number 

to be Determined), FAA-Approved 

Aircraft Dispatcher Certification 

Courses—Availability of Additional 

Supporting Documents and Extension of 

Comment Period. 

SUMMARY: This notice announces the 

availability of additional supporting 

documents and an extension of the 

comment period for the proposed policy 

applicable to Aircraft Dispatcher 

Certification Courses, which was 

published in this docket on October 22, 

2014. 

DATES: Extension of Comment Period. 

The comment period for the draft 

Aircraft Dispatcher Certification Course 

Policy published on October 22, 2014, 

which was scheduled to close on 

December 22, 2014, is hereby extended 

to February 22, 2015. 

ADDRESSES: Send comments identified 

by docket number FAA–2014–0820 

using any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the online instructions for sending your 

comments electronically. 

• Mail: Send comments to Docket 

Operations, M–30; U.S. Department of 

Transportation (DOT), 1200 New Jersey 

Avenue SE., Room W12–140, West 

Building Ground Floor, Washington, DC 

20590–0001. 

• Hand Delivery or Courier: Take 

comments to Docket Operations in 

Room W12–140 of the West Building 

Ground Floor at 1200 New Jersey 

Avenue SE., Washington, DC, between 9 

a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. 

• Fax: Fax comments to Docket 

Operations at 202–493–2251. 

Privacy: The FAA will post all 

comments it receives, without change, 

to http://www.regulations.gov, including 

any personal information the 

commenter provides. Using the search 

function of the docket Web site, anyone 

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