Federal Register / Vol. 80, No. 167 / Friday, August 28, 2015 / Rules and Regulations 52175 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–0822; Directorate 

Identifier 2014–NM–210–AD; Amendment 

39–18248; AD 2015–17–15] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702) 

airplanes, Model CL–600–2D15 

(Regional Jet Series 705) airplanes, 

Model CL–600–2D24 (Regional Jet 

Series 900) airplanes, and Model CL– 

600–2E25 (Regional Jet Series 1000) 

airplanes. This AD was prompted by 

results of a design review indicating that 

the burst pressure of the flexible hose, 

used to vent oxygen from the highpressure relief valve of the oxygen 

cylinder overboard, was lower than the 

opening pressure of the high-pressure 

relief valve, which could cause the 

flexible hose to burst before it can vent 

the excess oxygen overboard. This AD 

requires replacing the oxygen hose 

assembly with a new, improved 

assembly. We are issuing this AD to 

prevent the accumulation of oxygen in 

an enclosed space, which could result 

in an uncontrolled oxygen-fed fire if an 

ignition source is nearby. 

DATES: This AD becomes effective 

October 2, 2015. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 2, 2015. 

ADDRESSES: You may examine the AD 

docket on the Internet at http://

www.regulations.gov/

#!docketDetail;D=FAA-2015-0822 or in 

person at the Docket 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. 

For service information identified in 

this AD, contact Bombardier, Inc., 400 

Coˆte-Vertu Road West, Dorval, Que ́bec 

H4S 1Y9, Canada; telephone 514–855– 

5000; fax 514–855–7401; email thd.crj@

aero.bombardier.com; Internet http://

www.bombardier.com. You may view 

this referenced service information at 

the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue SW., 

Renton, WA. For information on the 

availability of this material at the FAA, 

call 425–227–1221. It is also available 

on the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

0822. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

NY 11590; telephone (516) 228–7318; 

fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Bombardier, Inc. Model 

CL–600–2C10 (Regional Jet Series 700, 

701, & 702) airplanes, Model CL–600– 

2D15 (Regional Jet Series 705) airplanes, 

Model CL–600–2D24 (Regional Jet 

Series 900) airplanes, and Model CL– 

600–2E25 (Regional Jet Series 1000) 

airplanes. The NPRM published in the 

Federal Register on April 13, 2015 

(80 FR 19574). 

Transport Canada Civil Aviation 

(TCCA), which is the airworthiness 

authority for Canada, has issued 

Canadian Airworthiness Directive CF– 

2014–37, dated October 17, 2014 

(referred to after this as the Mandatory 

Continuing Airworthiness Information, 

or ‘‘the MCAI’’), to correct an unsafe 

condition for certain Bombardier, Inc. 

Model CL–600–2C10 (Regional Jet 

Series 700, 701, & 702) airplanes, Model 

CL–600–2D15 (Regional Jet Series 705) 

airplanes, Model CL–600–2D24 

(Regional Jet Series 900) airplanes, and 

Model CL–600–2E25 (Regional Jet Series 

1000) airplanes. The MCAI states: 

Design review found that the burst 

pressure of the flexible hose, used to vent 

oxygen from the high-pressure relief valve of 

the oxygen cylinder overboard, is lower than 

the opening pressure of the high-pressure 

relief valve. This could cause the flexible 

hose to burst before it is able to vent the 

excess oxygen overboard. If an ignition 

source is present, the accumulation of oxygen 

in an enclosed space may result in an 

uncontrolled oxygen-fed fire. 

This [Canadian] AD mandates the 

replacement of the oxygen hose assembly 

with a new design oxygen hose assembly. 

You may examine the MCAI in the 

AD docket on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2015-0822- 

0004. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the NPRM (80 FR 19574, 

April 13, 2015) and the FAA’s response 

to each comment. 

Request To Change the Compliance 

Time 

Mesa Airlines and Envoy Air Inc. 

asked that the compliance time 

specified in paragraph (g) of the 

proposed AD (80 FR 19574, April 13, 

2015) be changed. 

Mesa Airlines stated that the current 

compliance time would immediately 

ground 78 airplanes on the effective 

date of the AD, and with increased 

demand for replacement parts it would 

be difficult to recover. Mesa Airlines 

asked that we change the compliance 

time to ‘‘Within 6,000 flight hours, or 

within 44 months after the effective date 

of this AD, whichever occurs first.’’ 

Mesa Airlines added that this would 

allow for scheduling with heavy 

maintenance inspection and parts 

procurement. 

Envoy Air Inc. stated that a large 

number of affected airplanes have flown 

more than 5,800 total flight hours. 

Envoy Air Inc. noted that the proposed 

compliance time ‘‘before the 

accumulation of 5,800 total flight 

hours’’ would mean that most of the 

affected airplanes would be required to 

comply with this AD prior to the 

effective date to remain in compliance. 

Envoy Air Inc. asked that we change the 

compliance time to ‘‘Within 5,800 flight 

hours or 44 months, whichever occurs 

first, from the effective date of the AD.’’ 

Envoy Air Inc. stated that this would 

more clearly communicate the desired 

compliance time for this AD. 

We partially agree with the requests. 

We have changed the compliance time 

in paragraph (g) of this AD to ‘‘Within 

5,800 flight hours or 44 months after the 

effective date of this AD, whichever 

occurs first.’’ This change matches the 

compliance time listed in the MCAI, 

and will allow operators to remain in 

compliance. 

We do not agree that the compliance 

time should be extended to ‘‘Within 

6,000 flight hours, or within 44 months 

after the effective date of this AD, 

whichever occurs first.’’ After 


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52176 Federal Register / Vol. 80, No. 167 / Friday, August 28, 2015 / Rules and Regulations 

considering all the available 

information, we have determined that 

the compliance time represents an 

appropriate interval of time in which 

the required actions can be performed in 

a timely manner within the affected 

fleet, while still maintaining an 

adequate level of safety. In developing 

an appropriate compliance time, we 

considered the safety implications, parts 

availability, and normal maintenance 

schedules for timely accomplishment of 

the replacement. However, if additional 

data are presented that would justify a 

longer compliance time, we may 

consider further rulemaking on this 

issue. We have not changed the AD in 

this regard. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting this AD 

with the change described previously 

and minor editorial changes. We have 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (80 FR 

19574, April 13, 2015) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (80 FR 19574, 

April 13, 2015). 

We also determined that these 

changes will not increase the economic 

burden on any operator or increase the 

scope of this AD. 

Related Service Information Under 1 

CFR Part 51 

Bombardier has issued Service 

Bulletin 670BA–35–013, Revision B, 

dated May 20, 2015, including 

Appendix A, dated May 21, 2013. The 

service information describes 

procedures for replacing the oxygen 

hose assembly with a new, improved 

assembly. 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 of this AD. 

Costs of Compliance 

We estimate that this AD affects 400 

airplanes of U.S. registry. 

We also estimate that it takes about 10 

work-hours per product to comply with 

the basic requirements of this AD. 

Required parts will cost about $0 per 

product. The average labor rate is $85 

per work-hour. Based on these figures, 

we estimate the cost of this AD on U.S. 

operators to be $340,000, or $850 per 

airplane. 

According to the manufacturer, some 

of the costs of this AD may be covered 

under warranty, thereby reducing the 

cost impact on affected individuals. We 

do not control warranty coverage for 

affected individuals. As a result, we 

have included all costs in our cost 

estimate. 

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 AD will not 

have federalism implications under 

Executive Order 13132. This AD will 

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 this AD: 

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. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov/

#!docketDetail;D=FAA-2015-0822; 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 street address for the 

Docket Operations office (telephone 

800–647–5527) is in the ADDRESSES

section. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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): 

2015–17–15 Bombardier, Inc.: Amendment 

39–18248. Docket No. FAA–2015–0822; 

Directorate Identifier 2014–NM–210–AD. 

(a) Effective Date 

This AD becomes effective October 2, 2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the airplanes, 

certificated in any category, identified in 

paragraphs (c)(1), (c)(2), and (c)(3) of this AD. 

(1) Bombardier, Inc. Model CL–600–2C10 

(Regional Jet Series 700, 701, & 702) 

airplanes, serial numbers 10002 through 

10336 inclusive. 

(2) Bombardier, Inc. Model CL–600–2D15 

(Regional Jet Series 705), and Model CL–600– 

2D24 (Regional Jet Series 900) airplanes, 

serial numbers 15001 through 15297 

inclusive. 

(3) Bombardier, Inc. Model CL–600–2E25 

(Regional Jet Series 1000) airplanes, serial 

numbers 19001 through 19038 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 35, Oxygen. 

(e) Reason 

This AD was prompted by results of a 

design review indicating that the burst 

pressure of the flexible hose, used to vent 

oxygen from the high-pressure relief valve of 

the oxygen cylinder overboard, was lower 

than the opening pressure of the highpressure relief valve, which could cause the 

flexible hose to burst before it can vent the 

excess oxygen overboard. We are issuing this 

AD to prevent the accumulation of oxygen in 

an enclosed space, which could result in an 

uncontrolled oxygen-fed fire if an ignition 

source is nearby. 


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Federal Register / Vol. 80, No. 167 / Friday, August 28, 2015 / Rules and Regulations 52177 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Replacement 

Within 5,800 flight hours or 44 months 

after the effective date of this AD, whichever 

occurs first: Replace all oxygen hose 

assemblies having part number (P/N) S6946– 

01 with new, improved assemblies having P/ 

N BA670–44025–001, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 670BA–35–013, Revision B, 

dated May 20, 2015, including Appendix A, 

dated May 21, 2013. For airplanes on which 

Supplemental Type Certificate ST01648NY 

(http://rgl.faa.gov/Regulatory_and_

Guidance_Library/rgstc.nsf/0/

ebd1cec7b301293e86257cb30045557a/$FILE/

ST01648NY.pdf) is installed, only PART B of 

the Accomplishment Instructions of 

Bombardier Service Bulletin 670BA–35–013, 

Revision B, dated May 20, 2015, including 

Appendix A, dated May 21, 2013, is required. 

(h) Credit for Previous Actions 

This paragraph provides credit for the 

replacement specified in paragraph (g) of this 

AD, if that action was performed before the 

effective date of this AD using Bombardier 

Service Bulletin 670BA–35–013, dated May 

21, 2013; or Bombardier Service Bulletin 

670BA–35–013, Revision A, dated September 

23, 2013; which are not incorporated by 

reference in this AD. 

(i) Parts Installation Prohibition 

As of the effective date of this AD, no 

person may install an oxygen hose assembly, 

P/N S6946–01, on any airplane. 

(j) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), ANE–170, FAA, 

has the authority to approve AMOCs for this 

AD, if requested using the procedures found 

in 14 CFR 39.19. Send information to ATTN: 

Program Manager, Continuing Operational 

Safety, FAA, New York ACO, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7300; fax 516–794–5531. 

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. The AMOC 

approval letter must specifically reference 

this AD. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain corrective 

actions from a manufacturer, the action must 

be accomplished using a method approved 

by the Manager, New York ACO, ANE–170, 

FAA; or Transport Canada Civil Aviation 

(TCCA); or Bombardier, Inc.’s TCCA Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(k) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

Airworthiness Directive CF–2014–37, dated 

October 17, 2014, for related information. 

This MCAI may be found in the AD docket 

on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2015-0822-0004. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (l)(3) and (l)(4) of this AD. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Bombardier Service Bulletin 670BA–35– 

013, Revision B, dated May 20, 2015, 

including Appendix A, dated May 21, 2013. 

(ii) Reserved. 

(3) For service information identified in 

this AD, contact Bombardier, Inc., 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–5000; fax 514– 

855–7401; email thd.crj@

aero.bombardier.com; Internet http://

www.bombardier.com. 

(4) You may view this service information 

at the FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, WA. For 

information on the availability of this 

material at the FAA, call 425–227–1221. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http://

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Renton, Washington, on August 

17, 2015. 

Kevin Hull, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2015–20961 Filed 8–27–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2014–1130; Directorate 

Identifier 2015–NE–04–AD; Amendment 39– 

18250; AD 2015–17–17] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all Pratt 

& Whitney (PW) PW4164–1D, PW4168– 

1D, PW4168A–1D and PW4170 engines, 

and certain PW4164, PW4168, and 

PW4168A turbofan engines. This AD 

was prompted by fuel nozzle-to-fuel 

supply manifold interface fuel leaks. 

This AD requires inspecting fuel nozzles 

for signs of leakage, replacing hardware 

as required, and torqueing to specified 

requirement. We are issuing this AD to 

prevent fuel leaks which could result in 

engine fire and damage to the airplane. 

DATES: This AD is effective October 2, 

2015. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of October 2, 2015. 

ADDRESSES: For service information 

identified in this AD, contact Pratt & 

Whitney, 400 Main St., East Hartford, 

CT 06108; phone: 860–565–8770; fax: 

860–565–4503. 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–2014– 

1130. 

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–2014– 

1130; 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. 

FOR FURTHER INFORMATION CONTACT: 

Katheryn Malatek, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7747; fax: 781–238– 

7199; email: katheryn.malatek@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all PW PW4164–1D, PW4168– 

1D, PW4168A–1D and PW4170 engines, 

and certain PW4164, PW4168, and 

PW4168A turbofan engines. The NPRM 


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