Federal Register / Vol. 80, No. 193 / Tuesday, October 6, 2015 / Rules and Regulations 60281 

processed as defined in FMVSS 

571.214. 

2.4. Pelvic: The pubic symphysis 

force measured by the ES–2re ATD must 

not exceed 1,350 lbs (6,000 N). Data 

must be processed as defined in FMVSS 

571.214. 

2.5. Leg: Axial rotation of the upper 

leg (femur) must be limited to 35 

degrees in either direction from the 

nominal seated position. 

2.6. Neck: As measured by the ES–2re 

ATD and filtered at CFC 600 as defined 

in SAE J211: 

2.6.1. The upper-neck tension force at 

the occipital condyle (O.C.) location 

must be less than 405 lb (1,800 N). 

2.6.2. The upper-neck compression 

force at the O.C. location must be less 

than 405 lb (1,800 N). 

2.6.3. The upper-neck bending torque 

about the ATD x-axis at the O.C. 

location must be less than 1,018 in.-lb 

(115 N–m). 

2.6.4. The upper-neck resultant shear 

force at the O.C. location must be less 

than 186 lb (825 N). 

2.7. Occupant (ES–2re ATD) 

retention: The pelvic restraint must 

remain on the ES–2re ATD’s pelvis 

during the impact and rebound phases 

of the test. The upper-torso restraint 

straps (if present) must remain on the 

ATD’s shoulder during the impact. 

2.8. Occupant (ES–2re ATD) support: 

2.8.1. Pelvis excursion: The loadbearing portion of the bottom of the 

ATD pelvis must not translate beyond 

the edges of its seat’s bottom seatcushion supporting structure. 

2.8.2. Upper-torso support: The lateral 

flexion of the ATD torso must not 

exceed 40 degrees from the normal 

upright position during the impact. 

3. For seats with an airbag system, 

show that the airbag system will deploy 

and provide protection under crash 

conditions where it is necessary to 

prevent serious injury. The means of 

protection must take into consideration 

a range of stature from a 2-year-old child 

to 95th percentile male. The airbag 

system must provide a consistent 

approach to energy absorption 

throughout that range of occupants. 

When the seat systems include airbag 

systems, the systems must be included 

in each of the certification tests as they 

would be installed in the airplane. In 

addition, the following situations must 

be considered: 

3.1. The seat occupant is holding an 

infant. 

3.2. The seat occupant is a pregnant 

woman. 

4. The airbag systems must provide 

adequate protection for each occupant 

regardless of the number of occupants of 

the seat assembly, considering that 

unoccupied seats may have an active 

airbag system. 

5. The design must prevent the airbag 

systems from being either incorrectly 

buckled or incorrectly installed, such 

that the airbag systems would not 

properly deploy. Alternatively, it must 

be shown that such deployment is not 

hazardous to the occupant and will 

provide the required injury protection. 

6. It must be shown that the airbag 

system is not susceptible to inadvertent 

deployment as a result of wear and tear, 

or inertial loads resulting from in-flight 

or ground maneuvers (including gusts 

and hard landings), and other operating 

and environment conditions (vibrations, 

moisture, etc.) likely to occur in service. 

7. Deployment of the airbag system 

must not introduce injury mechanisms 

to the seated occupant, nor result in 

injuries that could impede rapid egress. 

This assessment should include an 

occupant whose restraint is loosely 

fastened. 

8. It must be shown that inadvertent 

deployment of the airbag system, during 

the most critical part of the flight, will 

either meet the requirement of 

§ 25.1309(b) or not cause a hazard to the 

airplane or its occupants. 

9. It must be shown that the airbag 

system will not impede rapid egress of 

occupants 10 seconds after airbag 

deployment. 

10. The airbag systems must be 

protected from lightning and highintensity radiated fields (HIRF). The 

threats to the airplane specified in 

existing regulations regarding lighting, 

§ 25.1316, and HIRF, § 25.1317 apply to 

these special conditions for the purpose 

of measuring lightning and HIRF 

protection. 

11. The airbag system must function 

properly after loss of normal airplane 

electrical power, and after a transverse 

separation of the fuselage at the most 

critical location. A separation at the 

location of the airbag systems does not 

have to be considered. 

12. It must be shown that the airbag 

system will not release hazardous 

quantities of gas or particulate matter 

into the cabin. 

13. The airbag system installations 

must be protected from the effects of fire 

such that no hazard to occupants will 

result. 

14. A means must be available for a 

crew member to verify the integrity of 

the airbag system’s activation system 

prior to each flight, or it must be 

demonstrated to reliably operate 

between inspection intervals. The FAA 

considers that the loss of the airbagsystem deployment function alone (i.e., 

independent of the conditional event 

that requires the airbag-system 

deployment) is a major-failure 

condition. 

15. The inflatable material may not 

have an average burn rate of greater than 

2.5 inches/minute when tested using the 

horizontal flammability test defined in 

14 CFR part 25, appendix F, part I, 

paragraph (b)(5). 

16. The airbag system, once deployed, 

must not adversely affect the emergency 

lighting system (e.g., block floor 

proximity lights to the extent that the 

lights no longer meet their intended 

function). 

Issued in Renton, Washington, September 

25, 2015. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2015–25277 Filed 10–5–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2014–1046; Directorate 

Identifier 2014–NM–021–AD; Amendment 

39–18286; AD 2015–20–07] 

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), 

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

and CL–600–2D24 (Regional Jet Series 

900) airplanes. This AD was prompted 

by a determination that no instructions 

for continued airworthiness exist for the 

nose landing gear (NLG) alternate 

extension actuator of the NLG alternate 

release system. This AD requires 

revising the maintenance or inspection 

program, as applicable, to incorporate a 

new airworthiness limitation task for 

the NLG alternate extension actuator. 

We are issuing this AD to prevent 

failure of the NLG alternate release 

system and, if the normal NLG 

extension system also fails, failure of the 

NLG to extend, and consequent damage 

to the airplane and injury to occupants. 

DATES: This AD becomes effective 

November 10, 2015. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 10, 2015. 


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60282 Federal Register / Vol. 80, No. 193 / Tuesday, October 6, 2015 / Rules and Regulations 

ADDRESSES: You may examine the AD 

docket on the Internet at http://

www.regulations.gov/

#!docketDetail;D=FAA-2014-1046 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–2014– 

1046. 

FOR FURTHER INFORMATION CONTACT: 

Luke Walker, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office (ACO), 1600 

Stewart Avenue, Suite 410, Westbury, 

NY 11590; telephone 516–228–7363; 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), CL–600–2D15 (Regional Jet 

Series 705), and CL–600–2D24 (Regional 

Jet Series 900) airplanes. The NPRM 

published in the Federal Register on 

January 23, 2015 (80 FR 3502). 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2013–24R1, 

dated December 24, 2013 (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), CL–600–2D15 (Regional Jet 

Series 705), and CL–600–2D24 (Regional 

Jet Series 900) airplanes. The MCAI 

states: 

It was discovered that there are no 

instructions for continued airworthiness for 

the Nose Landing Gear (NLG) alternate 

extension actuator. Without an effective 

maintenance task to maintain the aeroplane’s 

inherent level of safety, there is a potential 

that a dormant failure of the alternate release 

system of the NLG could occur. Failure of the 

NLG alternate release system could prevent 

the nose landing gear from extending in the 

case of a failure of the normal NLG extension 

system. 

This [Canadian] AD is to mandate the 

incorporation of a new maintenance task to 

prevent failure of the NLG alternate release 

system. 

Revision 1 of this [Canadian] AD changes 

the phase-in time to be based on the NLG 

manual release actuators instead of 

aeroplanes. 

You may examine the MCAI in the 

AD docket on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2014-1046- 

0002. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the NPRM (80 FR 3502, 

January 23, 2015) and the FAA’s 

response to each comment. 

Support for the NPRM (80 FR 3502, 

January 23, 2015) 

Airline Pilots Association (ALPA) 

International agreed with the intent of 

the NPRM (80 FR 3502, January 23, 

2015). 

Request To Revise Compliance Time 

Envoy Airlines and Mesa Airlines 

asked that we revise the compliance 

time language in paragraph (h) of the 

proposed AD (80 FR 3502, January 23, 

2015) from ‘‘whichever occurs first’’ to 

‘‘whichever occurs later.’’ The 

compliance time, as written, could 

result in airplanes being grounded. 

Envoy Airlines added that the 

compliance time referred to in the 

TCCA AD is ‘‘whichever occurs later.’’ 

Mesa Airlines noted that changing the 

compliance time would also allow for 

scheduling and parts procurement. 

We agree with the commenters’ 

request for the reasons provided, and 

due to the fact that this was an 

inadvertent error. We have revised the 

compliance time in paragraph (h) of this 

AD as requested. 

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 3502, 

January 23, 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 3502, 

January 23, 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, Inc. has issued Task 

320100–225, Restoration of the NLG 

Manual Release Actuator, of Subject 1– 

32, Landing Gear, of Section 1, Systems 

and Powerplant Program, Volume 1 of 

Part 1, Maintenance Review Board 

Report, Revision 14, dated July 10, 2013, 

of the CRJ 700/900/1000 Maintenance 

Requirements Manual, CSP–B–053. This 

service information describes an 

airworthiness limitation task for the 

NLG alternate extension actuator. 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 416 

airplanes of U.S. registry. 

We also estimate that it takes about 1 

work-hour per product to comply with 

the basic requirements of this AD. The 

average labor rate is $85 per work-hour. 

Required parts will cost about $0 per 

product. Based on these figures, we 

estimate the cost of this AD on U.S. 

operators to be $35,360, or $85 per 

product. 

In addition, we estimate that any 

necessary follow-on actions take about 1 

work-hour and require parts costing $0, 

for a cost of $85 per product. We have 

no way of determining the number of 

aircraft that might need these actions. 

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 


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Federal Register / Vol. 80, No. 193 / Tuesday, October 6, 2015 / Rules and Regulations 60283 

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-2014-1046; 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): 

2015–20–07 Bombardier, Inc.: Amendment 

39–18286. Docket No. FAA–2014–1046; 

Directorate Identifier 2014–NM–021–AD. 

(a) Effective Date 

This AD becomes effective November 10, 

2015. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the airplanes identified 

in paragraphs (c)(1) and (c)(2) of this AD, 

certificated in any category. 

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

(Regional Jet Series 700, 701, & 702) 

airplanes, serial number (S/N) 10002 and 

subsequent. 

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

(Regional Jet Series 705), and CL–600–2D24 

(Regional Jet Series 900) airplanes, S/N 15001 

and subsequent. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 32, Landing Gear. 

(e) Reason 

This AD was prompted by a determination 

that no instructions for continued 

airworthiness exist for the nose landing gear 

(NLG) alternate extension actuator of the 

NLG alternate release system. We are issuing 

this AD to prevent failure of the NLG 

alternate release system and, if the normal 

NLG extension system also fails, failure of 

the NLG to extend, and consequent damage 

to the airplane and injury to occupants. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Maintenance or Inspection Program 

Revision 

Within 30 days after the effective date of 

this AD, revise the maintenance or inspection 

program, as applicable, to incorporate the 

information specified in Task 320100–225, 

Restoration of the NLG Manual Release 

Actuator, of Subject 1–32, Landing Gear, of 

Section 1, Systems and Powerplant Program, 

Volume 1 of Part 1, Maintenance Review 

Board Report, Revision 14, dated July 10, 

2013, of the CRJ 700/900/1000 Maintenance 

Requirements Manual, CSP–B–053. The 

initial compliance time for the task is 

specified in paragraph (h) of this AD. 

(h) Initial Task Compliance Time 

Before the accumulation of 20,000 total 

flight cycles, or within 5,500 flight cycles 

after the effective date of this AD, whichever 

occurs later: Perform the initial restoration 

specified in Task 320100–225, Restoration of 

the NLG Manual Release Actuator, of Subject 

1–32, Landing Gear, of Section 1, Systems 

and Powerplant Program, Volume 1 of Part 1, 

Maintenance Review Board Report, Revision 

14, dated July 10, 2013, of the CRJ 700/900/ 

1000 Maintenance Requirements Manual, 

CSP–B–053. 

(i) No Alternative Actions and Intervals 

After accomplishing the revision required 

by paragraph (g) of this AD, no alternative 

actions (e.g., inspections) or intervals may be 

used unless the actions or intervals are 

approved as an alternative method of 

compliance (AMOC) in accordance with the 

procedures specified in paragraph (j)(1) of 

this AD. 

(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. 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 ACO, send it to 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, 

Engine and Propeller Directorate, 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 DAOauthorized signature. 

(k) Related Information 

Refer to MCAI Canadian Airworthiness 

Directive CF–2013–24R1, dated December 24, 

2013, for related information. This MCAI 

may be found in the AD docket on the 

Internet at http://www.regulations.gov/

#!documentDetail;D=FAA-2014-1046-0002. 

(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) Task 320100–225, Restoration of the 

NLG Manual Release Actuator, of Subject 1– 

32, Landing Gear, of Section 1, Systems and 

Powerplant Program, Volume 1 of Part 1, 

Maintenance Review Board Report, Revision 

14, dated July 10, 2013, of the CRJ 700/900/ 

1000 Maintenance Requirements Manual, 

CSP–B–053. 

(ii) Reserved. 

(3) For service information identified in 

this AD, 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. 

(4) You may view this service information 

at the FAA, Transport Airplane Directorate, 


srobinson on DSK5SPTVN1PROD with RULES
60284 Federal Register / Vol. 80, No. 193 / Tuesday, October 6, 2015 / Rules and Regulations 

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 

September 27, 2015. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2015–25219 Filed 10–5–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–0684; Directorate 

Identifier 2014–NM–215–AD; Amendment 

39–18285; AD 2015–20–06] 

RIN 2120–AA64 

Airworthiness Directives; Viking Air 

Limited (Type Certificate Previously 

Held by 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 all 

Viking Air Limited (Type Certificate 

Previously Held by Bombardier, Inc.) 

Model DHC–7–1 and DHC–7–100 

airplanes. This AD was prompted by 

reports of cracks that were discovered in 

the outboard nacelles upper longeron 

channels and angles. This AD requires 

a one-time detailed visual inspection for 

cracking in the outboard nacelles upper 

longeron channels and angles; and 

repair if necessary. We are issuing this 

AD to detect and correct cracks in the 

outboard nacelles upper longeron 

channels and angles, which could lead 

to the loss of stiffness in the forward 

engine mount; and possible catastrophic 

failure. 

DATES: This AD becomes effective 

November 10, 2015. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 10, 2015. 

ADDRESSES: You may examine the AD 

docket on the Internet at http://

www.regulations.gov/

#!docketDetail;D=FAA-2015-0684 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 Viking Air Limited, 

9574 Hampden Road, Sidney, British 

Columbia V8L 8V5, Canada; telephone 

250–656–7227; fax 250–656–0673; email 

technical.publications@vikingair.com; 

Internet http://www.vikingair.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– 

0684. 

FOR FURTHER INFORMATION CONTACT: Aziz 

Ahmed, 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 7329; 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 all Viking Air Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Model DHC–7–1 and 

DHC–7–100 airplanes. The NPRM 

published in the Federal Register on 

April 13, 2015 (80 FR 19572). 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2014–34, 

dated October 2, 2014, dated (referred to 

after this as the Mandatory Continuing 

Airworthiness Information, or ‘‘the 

MCAI’’), to correct an unsafe condition 

for all Viking Air Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Model DHC–7–1 and 

DHC–7–100 airplanes. The MCAI states: 

Longitudinal cracks were discovered in the 

outboard nacelles upper longeron channels 

and angles at station XN1 78. The cracks 

were partially hidden by bearing blocks, Part 

Number (P/N) 75420978, at the nacelle latch 

locations. Undetected, these cracks may lead 

to the loss of stiffness in the forward engine 

mount; which may lead to a catastrophic 

failure. 

Required actions include a one-time 

detailed visual inspection for cracking 

of the outboard nacelles upper longeron 

channels and angles. Corrective actions 

include repair, if necessary. You may 

examine the MCAI in the AD docket on 

the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2015-0684- 

0002. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM (80 

FR 19572, April 13, 2015) or on the 

determination of the cost to the public. 

Conclusion 

We reviewed the relevant data and 

determined that air safety and the 

public interest require adopting this AD 

as proposed except for minor editorial 

changes. We have determined that these 

minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (80 FR 

19572, 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 19572, 

April 13, 2015). 

Related Service Information Under 1 

CFR Part 51 

Viking Air Limited has issued Service 

Bulletin V7–54–02, Revision NC, dated 

December 14, 2012. The service 

information describes procedures for an 

inspection for cracks in the outboard 

nacelles upper longeron channels and 

angles; and repair if necessary. 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 10 

airplanes of U.S. registry. 

We also estimate that it will take 

about 3 work-hours per product to 

comply with the basic requirements of 

this AD. 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 $2,550, or $255 per 

product. 

We have received no definitive data 

that would enable us to provide cost 

estimates for the on-condition actions 

specified in this AD. 

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. 


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