40514 Federal Register / Vol. 82, No. 164 / Friday, August 25, 2017 / Proposed Rules 

approval of an AMOC, provided the RC steps, 

including substeps and identified figures, can 

still be done as specified, and the airplane 

can be put back in an airworthy condition. 

(m) Related Information 

(1) For more information about this AD, 

contact Allen Rauschendorfer, Aerospace 

Engineer, Airframe Branch, FAA, Seattle 

ACO Branch, 1601 Lind Avenue SW., 

Renton, WA 98057–3356; phone: 425–917– 

6487; fax: 425–917–6590; email: 

allen.rauschendorfer@faa.gov. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; Internet https://

www.myboeingfleet.com. You may view this 

referenced service information at the FAA, 

Transport Standards Branch, 1601 Lind 

Avenue SW., Renton, WA. For information 

on the availability of this material at the 

FAA, call 425–227–1221. 

Issued in Renton, Washington, on August 

9, 2017. 

Dionne Palermo, 

Acting Director, System Oversight Division, 

Aircraft Certification Service. 

[FR Doc. 2017–17543 Filed 8–24–17; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2017–0719; Product 

Identifier 2017–NE–22–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Division 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all Pratt 

& Whitney Division (PW) PW4074, 

PW4074D, PW4077, PW4077D, 

PW4084D, PW4090, and PW4090–3 

turbofan engines. This proposed AD was 

prompted by the discovery of multiple 

cracked outer diffuser cases. This 

proposed AD would require initial and 

repetitive inspections to detect cracks in 

the outer diffuser case and removal from 

service of cases that fail inspection. We 

are proposing this AD to address the 

unsafe condition on these products. 

DATES: We must receive comments on 

this proposed AD by September 25, 

2017. 

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 Pratt & Whitney 

Division, 400 Main St., East Hartford, 

CT 06118; phone: 800–565–0140; fax: 

860–565–5442. You may view this 

service information at the FAA, Engine 

and Propeller Standards Branch, Policy 

and Innovation Division, 1200 District 

Avenue, 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–2017– 

0719; 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: JoAnn Theriault, Aerospace Engineer, 

FAA, ECO Branch, Compliance and 

Airworthiness Division,1200 District 

Avenue, Burlington, MA 01803; phone: 

781–238–7105; fax: 781–238–7199; 

email: jo-ann.theriault@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2017–0719; Directorate Identifier 2017– 

NE–22–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 

We were notified of the discovery of 

multiple cracked outer diffuser cases. 

This proposed AD requires initial and 

repetitive inspections to detect cracks in 

the outer diffuser case and removal from 

service of cases that fail inspection. This 

condition, if not corrected, could result 

in failure of the outer diffuser case, 

uncontained case release, damage to the 

engine, and damage to the airplane. 

Related Service Information Under 1 

CFR Part 51 

We reviewed PW Service Bulletin 

(SB) No. PW4G–112–A72–347, dated 

March, 31, 2017. This PW SB provides 

guidance on performing outer diffuser 

case fluorescent penetrant inspections 

(FPI). This service information is 

reasonably available because the 

interested parties have access to it 

through their normal course of business 

or by the means identified in the 

ADDRESSES section. 

Other Related Service Information 

We reviewed PW4000 Series (112 

Inch) Engine Cleaning, Inspection and 

Repair (CIR) Manual, Part Number 

51A750, Revision Number 74, section 

72–41–13, Inspection/Check-02, dated 

July 15, 2017. This manual section 

provides guidance on performing the 

high sensitivity FPI of the outer diffuser 

case at piece-part exposure. 

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 require 

initial and repetitive inspections to 

detect cracks in the outer diffuser case 

and removal from service of cases that 

fail inspection. 

Costs of Compliance 

We estimate that this proposed AD 

affects 121 engines installed on 

airplanes of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 


pmangrum on DSK3GDR082PROD with PROPOSALS
Federal Register / Vol. 82, No. 164 / Friday, August 25, 2017 / Proposed Rules 40515 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Tt3 boss inspection ................. 3.5 work-hours × $85 per hour = $297.50 ............................. $0 $297.50 $35,997.50 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

proposed inspection. We estimate six 

cases will need to be replaced in the 

domestic fleet. 

ON-CONDITION COST

Action Labor cost Parts cost Cost per 

product 

FPI Inspection of outer diffuser case ........................... 10 work-hours × $85 per hour = $850.00 .................... $0 $850.00 

Replacement of outer diffuser case ............................. $0 .................................................................................. 750,000 750,000 

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. 

This AD is issued in accordance with 

authority delegated by the Executive 

Director, Aircraft Certification Service, 

as authorized by FAA Order 8000.51C. 

In accordance with that order, issuance 

of ADs is normally a function of the 

Compliance and Airworthiness 

Division, but during this transition 

period, the Executive Director has 

delegated the authority to issue ADs 

applicable to engines, propellers, and 

associated appliances to the Manager, 

Engine and Propeller Standards Branch, 

Policy and Innovation Division. 

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, 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): 

Pratt & Whitney Division: Docket No. FAA– 

2017–0719; Product Identifier 2017–NE– 

22–AD. 

(a) Comments Due Date 

We must receive comments by September 

25, 2017. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Pratt & Whitney 

Division (PW) PW4074, PW4074D, PW4077, 

PW4077D, PW4084D, PW4090, and PW4090– 

3 turbofan engines with outer diffuser case, 

part number (P/N) 50J775 or P/N 50J930, 

installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7240, Turbine Engine Combustion 

Section. 

(e) Unsafe Condition 

This AD was prompted by the discovery of 

multiple cracked outer diffuser cases. We are 

issuing this AD to prevent failure of the outer 

diffuser case. The unsafe condition, if not 

corrected, could result in failure of the outer 

diffuser case, uncontained case release, 

damage to the engine, and damage to the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Perform an initial high sensitivity 

fluorescent penetrant inspection (FPI) of the 

outer diffuser case T3 thermocouple probe 

boss (Tt3 boss) prior to accumulating 13,000 

cycles since new (CSN), or within 1,000 

flight cycles from the effective date of this 

AD, whichever occurs later. If the case CSN 

is unknown, inspect within 1,000 flight 

cycles from the effective date of this AD. 

(2) Thereafter, repeat the high sensitivity 

FPI of the outer diffuser case Tt3 boss within 

2,000 flight cycles since the last FPI. 

(3) If a crack is found during the 

inspections required by paragraphs (g)(1) or 

(2) of this AD, re-inspect or remove the outer 

diffuser case from service as follows: 

(i) For engines installed on-wing, reinspect or remove in accordance with Part A, 

1.G., of PW Service Bulletin (SB) No. PW4G– 

112–A72–347, dated March 31, 2017. 

(ii) For assembled engines not installed onwing, re-inspect or remove in accordance 

with Part B, 1.C., of PW SB No. PW4G–112– 

A72–347, dated March 31, 2017. 

(iii) For disassembled engines, remove 

from service before further flight. 


pmangrum on DSK3GDR082PROD with PROPOSALS
40516 Federal Register / Vol. 82, No. 164 / Friday, August 25, 2017 / Proposed Rules 

(4) Within 30 days of the effective date of 

this AD, update the mandatory inspections of 

the Airworthiness Limitations Section (ALS) 

of your Instructions for Continued 

Airworthiness to include the piece-part 

inspections of the diffuser case as defined in 

Figure 1 to paragraph (g) of this AD. 

FIGURE 1 TO PARAGRAPH (g)—ADDITION TO ALS 

Description Part No. CIR manual 

section CIR manual inspection CIR manual 

Case, Diffuser, Outer ............................. All ........................... 72–41–13 Inspection/Check (I/C–02) ..................... P/N 51A750 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, FAA, ECO Branch, 

Compliance and Airworthiness Division, has 

the authority to approve AMOCs for this AD, 

if requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ECO Branch, send it to 

the attention of the person identified in 

paragraph (i)(1) of this AD. You may email 

your request to: ANE-AD-AMOC@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(i) Related Information 

(1) For more information about this AD, 

contact Jo-Ann Theriault, Aerospace 

Engineer, FAA, ECO Branch, Compliance and 

Airworthiness Division, 1200 District 

Avenue, Burlington, MA 01803; phone: 781– 

238–7105; fax: 781–238–7199; email: joann.theriault@faa.gov. 

(2) For service information identified in 

this AD, contact Pratt & Whitney Division, 

400 Main St., East Hartford, CT 06118; 

phone: 800–565–0140; fax: 860–565–5442. 

You may view this referenced service 

information at the FAA, Engine and Propeller 

Standards Branch, Policy and Innovation 

Division, 1200 District Avenue, Burlington, 

MA. For information on the availability of 

this material at the FAA, call 781–238–7125. 

Issued in Burlington, Massachusetts, on 

August 18, 2017. 

Robert J. Ganley, 

Manager, Engine and Propeller Standards 

Branch, Aircraft Certification Service. 

[FR Doc. 2017–17827 Filed 8–24–17; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2017–0313; Product 

Identifier 2017–NE–11–AD] 

RIN 2120–AA64 

Airworthiness Directives; CFM 

International S.A. Turbofan 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 

CFM International S.A. (CFM) CFM56– 

7B turbofan engines. This proposed AD 

was prompted by a report of an in-flight 

fan blade failure and uncontained 

forward release of debris on a CFM56– 

7B turbofan engine. This proposed AD 

would require an ultrasonic inspection 

(USI) of certain fan blades and, if they 

fail the inspection, their replacement 

with parts eligible for installation. We 

are proposing this AD to correct the 

unsafe condition on these products. 

DATES: We must receive comments on 

this proposed AD by October 10, 2017. 

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 CFM International 

Inc., Aviation Operations Center, 1 

Neumann Way, M/D Room 285, 

Cincinnati, OH 45125; phone: 877–432– 

3272; fax: 877–432–3329; email: 

aviation.fleetsupport@ge.com. You may 

view this service information at the 

FAA, Engine and Propeller Standards 

Branch, Policy and Innovation Division, 

1200 District Avenue, 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–2017– 

0313; 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 proposed AD, 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: 

Kasra Sharifi, Aerospace Engineer, FAA, 

ECO Branch, Compliance and 

Airworthiness Division, 1200 District 

Avenue, Burlington, MA 01803; phone: 

781–238–7773; fax: 781–238–7199; 

email: kasra.sharifi@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2017–0313; Directorate Identifier 2017– 

NE–11–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 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 proposed AD. 

Discussion 

We received a report of a fan blade 

failure and inlet separation on a 

CFM56–7B engine that occurred during 

a revenue flight. This fan blade failure 

was contained by the engine case, but 

there was subsequent uncontained 

forward release of inlet cowl and other 

debris. The fracture in the blade 

initiated from the fan blade dovetail. 

The investigation, however, into the 

root cause of the fan blade failure is not 

complete. This condition, if not 


pmangrum on DSK3GDR082PROD with PROPOSALS