37258 Federal Register / Vol. 76, No. 123 / Monday, June 27, 2011 / Rules and Regulations 

Maintenance Requirements, Document 

955.2074/93, Issue 19, dated March 22, 2006; 

on April 9, 2007 (72 FR 9658, March 5, 2007). 

(3) For service information identified in 

this AD, contact Airbus SAS—Airworthiness 

Office—EAL, 1 Rond Point Maurice Bellonte, 

31707 Blagnac Cedex, France; telephone +33 

5 61 93 36 96; fax +33 5 61 93 45 80, e-mail 

airworthiness.A330-A340@airbus.com; 

Internet http://www.airbus.com. 

(4) You may review copies of the service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue, SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

(5) You may also review copies of the 

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/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on June 14, 

2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–15366 Filed 6–24–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0036; Directorate 

Identifier 2010–NM–230–AD; Amendment 

39–16729; AD 2011–13–06] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model DHC–8–400 Series 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

August 1, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of August 1, 2011. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC. 

FOR FURTHER INFORMATION CONTACT: 

James Delisio, Aerospace Engineer, 

Propulsion and Services Branch, ANE– 

173, FAA, New York Aircraft 

Certification Office, 1600 Stewart 

Avenue, Suite 410, Westbury, New York 

11590; telephone (516) 228–7321; fax 

(516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on February 7, 2011 (76 FR 

6584). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

The Bombardier modifications include: 

• Modsum 4–126330, ‘‘Fuel Tank 

System Design Left and Right Side 

(SFAR 88) Retrofit.’’ The retrofit 

includes replacing certain fittings, 

couplings, o-rings, gaskets, fuel adapter, 

and other related components with new, 

improved parts; applying Alodine 1132 

to certain areas of a wing rib and a wing 

spar; and replacing a certain doubler on 

the front wing spar with a new, 

improved doubler. 

• Modsum 4–126366, ‘‘Fuel Tank 

System and Fuel Indication—Wiring 

Identification, Segregation and 

Installation (High Level Sensor and Fuel 

Quantity Indication)—Retrofit.’’ The 

retrofit includes adding new wiring 

with protective sleeving, reworking 

existing wiring, labeling and separating 

the fuel quantity indicating (FQI) wiring 

and high level sensor wiring from other 

wiring, enhancing the electro-magnetic 

interference (EMI) shielding of the 

wiring connected to the vent valve 

position switch, and installing 

additional provisions (bulkhead 

brackets) for wiring clips in the center 

fuselage. 

• Modsum 4–901425, ‘‘Fuel Feed to 

APU—Replacement of Couplings in 

Center Wing Left Side—SFAR 88.’’ 

• Modsum 4–126370, ‘‘Fuel Tank 

System—Enhance Protective Covering 

for Electrical Cable Assembly,’’ which 

includes reworking the contact area on 

the rib at Yw–42.000 to ensure adequate 

electrical bonding, installing spiral wrap 

on certain cable assemblies where 

existing spiral wrap does not extend 4 

inches past the tie mounts, applying a 

dome seal on thread openings on a high 

level sensor, and installing fuel 

grommets at certain locations. 

• Modsum 4–113580, ‘‘Fuel 

Indication—High Level Sensor— 

Application of Sealant to Exposed End 

of Sensor Terminal Block Screws— 

Special Inspection and Rectification,’’ 

which includes doing a detailed 

inspection of the high level sensor for 

correct sealant coverage (‘dome seal’) on 

the terminal screws, and applying 

sealant if necessary. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 


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Federal Register / Vol. 76, No. 123 / Monday, June 27, 2011 / Rules and Regulations 37259 

general, agree with their substance. But 

we might have found it necessary to use 

different words from those in the MCAI 

to ensure the AD is clear for U.S. 

operators and is enforceable. In making 

these changes, we do not intend to differ 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have required different 

actions in this AD from those in the 

MCAI in order to follow our FAA 

policies. Any such differences are 

highlighted in a Note within the AD. 

Costs of Compliance 

We estimate that this AD will affect 

67 products of U.S. registry. We also 

estimate that it will take about 526 

work-hours 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 $37,696 

per product. Where the service 

information lists required parts costs 

that are covered under warranty, we 

have assumed that there will be no 

charge for these parts. As we do not 

control warranty coverage for affected 

parties, some parties may incur costs 

higher than estimated here. Based on 

these figures, we estimate the cost of 

this AD to the U.S. operators to be 

$5,521,202, or $82,406 per product. 

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 

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 

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; or in person 

at the Docket Operations office between 

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

Friday, except Federal holidays. The AD 

docket contains the NPRM, 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. Comments will 

be available in the AD docket shortly 

after receipt. 

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 AD: 

2011–13–06 Bombardier, Inc.: Amendment 

39–16729. Docket No. FAA–2011–0036; 

Directorate Identifier 2010–NM–230–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective August 1, 2011. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model DHC–8–400, –401, and –402 

airplanes, certificated in any category; with 

serial numbers (S/N) 4003, 4004, 4006, and 

4008 through 4205 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 28: Fuel. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Actions Applicable to Airplanes Having S/N 

4003, 4004, 4006 & 4008 through 4118 

(g) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive: 

Within 6,000 flight hours after the effective 

date of this AD, incorporate the 

modifications required in paragraphs (g)(1), 

(g)(2), and (g)(3) of this AD, as applicable. 

(1) Incorporate Bombardier Modsum 4– 

126330, ‘‘Fuel Tank System Design Left and 

Right Side (SFAR 88) Retrofit,’’ by doing all 

the applicable actions in the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–57–09, Revision B, dated 

September 3, 2008. 

(2) Incorporate Bombardier Modsum 4– 

126366, ‘‘Fuel Tank System and Fuel 

Indication—Wiring Identification, 

Segregation and Installation (High Level 

Sensor and Fuel Quantity Indication)— 

Retrofit,’’ by doing all the applicable actions 

in the Accomplishment Instructions of 

Bombardier Service Bulletin 84–28–04, 

Revision B, dated October 21, 2009. 

(3) For airplanes on which Bombardier 

Modsum 4–302000, ‘‘Standard Option—APU 

Installation,’’ has been installed: Incorporate 

Bombardier Modsum 4–901425, ‘‘Fuel Feed 

to APU—Replacement of Couplings in Center 

Wing Left Side—SFAR 88,’’ by doing all the 

applicable actions in the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–05, dated June 28, 2006. 

(h) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive, do 

Bombardier Fuel System Limitation (FSL) 

Task 284000–417 (Functional Check of the 

Fuel Tank Components and Plumbing Lines 

for Electrical Bonding) contained in Section 

4–1, Fuel System Limitations, of Part 2— 

Airworthiness Limitation Items, Revision 5, 

dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7, at the applicable times 

specified in paragraphs (h)(1) and (h)(2) of 


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37260 Federal Register / Vol. 76, No. 123 / Monday, June 27, 2011 / Rules and Regulations 

this AD. Where the task specifies contacting 

Bombardier for technical assistance, this AD 

requires repairs/rework actions in accordance 

with a method approved by the Manager, 

New York Aircraft Certification Office (ACO), 

FAA, or Transport Canada Civil Aviation 

(TCCA) (or its delegated agent). 

(1) Except as provided in paragraphs 

(h)(1)(i) and (h)(1)(ii) of this AD, for airplanes 

that have incorporated either Bombardier 

Modsum 4–126330 or 4–901425 prior to the 

effective date of this AD: Do Bombardier Task 

284000–417 in Section 4–1, Fuel System 

Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated April 21, 

2010, of Bombardier Q400 Dash 8 

Maintenance Requirements Manual, PSM 1– 

84–7, within 6,000 flight hours after the 

effective date of this AD. 

(i) Airplanes on which Bombardier Task 

284000–417 in Section 4–1, Fuel System 

Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated April 21, 

2010, of Bombardier Q400 Dash 8 

Maintenance Requirements Manual, PSM 1– 

84–7, was successfully completed after 

incorporation of Bombardier Modsum 4– 

126330 or 4–901425 do not need to comply 

with the requirements of paragraph (h) of this 

AD. 

(ii) Airplanes on which Bombardier 

Modsum 4–126330 or 4–901425 was 

incorporated during manufacturing of the 

airplane do not need to comply with the 

requirements of paragraph (h) of this AD. 

(2) For airplanes on which neither 

Bombardier Modsum 4–126330 nor 4–901425 

were incorporated before the effective date of 

this AD: Do Bombardier Task 284000–417 in 

Section 4–1, Fuel System Limitations, of Part 

2—Airworthiness Limitation Items, Revision 

5, dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7, upon completion of the 

incorporation of Bombardier Modsum 4– 

126330 and, if applicable, Bombardier 

Modsum 4–901425. 

Actions Applicable to Airplanes S/N 4003, 

4004, 4006 & 4008 Through 4118 Inclusive, 

Manufactured Before September 21, 2005 

(i) For airplanes having S/N 4003, 4004, 

4006, and 4008 through 4118 inclusive, on 

which the date of issuance of the original 

Canadian standard airworthiness certificate 

or the date of issuance of the original 

Canadian export certificate of airworthiness 

is before September 21, 2005: Within 6,000 

flight hours after the effective date of this AD, 

incorporate Bombardier Modsum 4–126370, 

‘‘Fuel Tank System—Enhance Protective 

Covering for Electrical Cable Assembly,’’ by 

doing all the applicable actions in the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–28–03, Revision C, dated 

May 15, 2009. 

Actions Applicable to Airplanes S/N 4003, 

4004, 4006 & 4008 Through 4118 Inclusive, 

Manufactured on or After September 21, 

2005 

(j) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive, on 

which the date of issuance of the original 

Canadian standard airworthiness certificate 

or the date of issuance of the original 

Canadian export certificate of airworthiness 

is on or after September 21, 2005: Within 

12,000 flight hours after the effective date of 

this AD, incorporate Bombardier Modsum 4– 

126370, ‘‘Fuel Tank System—Enhance 

Protective Covering for Electrical Cable 

Assembly,’’ by doing all the applicable 

actions in the Accomplishment Instructions 

of Bombardier Service Bulletin 84–28–03, 

Revision C, dated May 15, 2009. 

Actions Applicable to Airplanes S/N 4119 

Through 4205 Inclusive 

(k) For airplanes having S/N 4119 through 

4205 inclusive: Within 6,000 flight hours 

after the effective date of this AD, incorporate 

Bombardier Modsum 4–113580, ‘‘Fuel 

Indication—High Level Sensor—Application 

of Sealant to Exposed End of Sensor 

Terminal Block Screws—Special Inspection 

and Rectification,’’ by doing all the 

applicable actions in the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–07, dated August 1, 2008. 

Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(l) Incorporation of Bombardier Modsum 

4–126330 prior to the effective date of this 

AD according to the instructions contained in 

Bombardier Service Bulletin 84–57–09, 

Revision A, dated March 19, 2007, meets the 

requirements of paragraph (g)(1) of this AD. 

(m) Incorporation of Bombardier Modsum 

4–126366 prior to the effective date of this 

AD according to the instructions contained in 

Bombardier Service Bulletin 84–28–04, dated 

June 29, 2006; or Revision A, dated 

November 15, 2006; meets the requirements 

of paragraph (g)(2) of this AD. 

(n) Incorporation of Bombardier Modsum 

4–126370 prior to the effective date of this 

AD according to instructions contained in 

Bombardier Service Bulletin 84–28–03, 

Revision B, dated October 18, 2006, meets 

the requirements of paragraphs (i) and (j) of 

this AD. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: The 

MCAI specifies to do Bombardier Task 

284000–417 in Section 4–1, Fuel System 

Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated April 21, 

2010, of Bombardier Q400 Dash 8 

Maintenance Requirements Manual, PSM 1– 

84–7, but does not specify what to do if the 

functional check finds that measured 

resistance exceeds the specified values. This 

AD requires contacting the Manager, New 

York ACO, FAA, or TCCA (or its delegated 

agent) for repair/rework instructions. 

Other FAA AD Provisions 

(o) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, ANE–170, New York 

ACO, 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, New York 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) Airworthy Product: For any 

requirement in this AD to obtain corrective 

actions from a manufacturer or other source, 

use these actions if they are FAA-approved. 

Corrective actions are considered FAAapproved if they are approved by the State 

of Design Authority (or their delegated 

agent). You are required to assure the product 

is airworthy before it is returned to service. 

Related Information 

(p) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–31, dated September 3, 

2010; Bombardier Task 284000–417 in 

Section 4–1, Fuel System Limitations, of Part 

2—Airworthiness Limitation Items, Revision 

5, dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7; and the Bombardier service 

bulletins identified in Table 1 of this AD; for 

related information. 

TABLE 1—RELEVANT SERVICE INFORMATION

Bombardier service bulletin— Revision— Dated— 

84–28–03 ...................................................................... C ................................................. May 15, 2009. 

84–28–04 ...................................................................... B .................................................. October 21, 2009. 

84–28–05 ...................................................................... Original ........................................ June 28, 2006. 

84–28–07 ...................................................................... Original ........................................ August 1, 2008. 

84–57–09 ...................................................................... B .................................................. September 3, 2008. 


jlentini on DSK4TPTVN1PROD with RULES
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Material Incorporated by Reference 

(q) You must use Bombardier Task 

284000–417 in Section 4–1, Fuel System 

Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated April 21, 

2010, of Bombardier Q400 Dash 8 

Maintenance Requirements Manual, PSM 1– 

84–7, and the service information contained 

in Table 2 of this AD, as applicable, to do the 

actions required by this AD, unless the AD 

specifies otherwise. The revision level for 

Bombardier Task 284000–417 in Section 4– 

1, Fuel System Limitations, of Part 2— 

Airworthiness Limitation Items, Revision 5, 

dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7, is specified only on the title 

page and page 1 of the record of Revisions 

of that document. Page 4 of Section 4–1, Fuel 

System Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated April 21, 

2010, of Bombardier Q400 Dash 8 

Maintenance Requirements Manual, PSM 1– 

84–7, is not listed in the Table of Contents 

of that document. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) 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; e-mail 

thd.qseries@aero.bombardier.com; Internet 

http://www.bombardier.com. 

(3) You may review copies of the service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

(4) You may also review copies of the 

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/ 

code_of_federal_regulations/ 

ibr_locations.html. 

TABLE 2—SERVICE BULLETINS INCORPORATED BY REFERENCE

Document Revision Date 

Bombardier Service Bulletin 84–28–03 ........................ C ................................................. May 15, 2009 

Bombardier Service Bulletin 84–28–04 ........................ B .................................................. October 21, 2009

Bombardier Service Bulletin 84–28–05 ........................ Original ........................................ June 28, 2006 

Bombardier Service Bulletin 84–28–07 ........................ Original ........................................ August 1, 2008 

Bombardier Service Bulletin 84–57–09 ........................ B .................................................. September 3, 2008 

Issued in Renton, Washington, on June 10, 

2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–15364 Filed 6–24–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2011–0078; Airspace 

Docket No. 10–AEA–20] 

Establishment of Helicopter Area 

Navigation (RNAV) Routes; Northeast 

United States 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: This action establishes 

helicopter RNAV routes as part of the 

U.S. air traffic service route (ATS) 

structure and designates two helicopter 

RNAV routes (TK-routes) in the 

northeast corridor between the 

Washington, DC, and New York City 

metropolitan areas. The TK-routes are 

for use by helicopters having IFRapproved Global Positioning System 

(GPS)/Global Navigation Satellite 

System (GNSS) equipment. The FAA is 

taking this action to enhance safety and 

to improve the efficient use of the 

navigable airspace for en route IFR 

helicopter operations. 

DATES: Effective date 0901 UTC, August 

25, 2011. The Director of the Federal 

Register approves this incorporation by 

reference action under 1 CFR part 51, 

subject to the annual revision of FAA 

Order 7400.9 and publication of 

conforming amendments. 

FOR FURTHER INFORMATION CONTACT: Paul 

Gallant, Airspace, Regulations and ATC 

Procedures Group, Office of Airspace 

Services, Federal Aviation 

Administration, 800 Independence 

Avenue, SW., Washington, DC 20591; 

telephone: (202) 267–8783. 

SUPPLEMENTARY INFORMATION: 

History 

On Tuesday, March 8, 2011, the FAA 

published in the Federal Register a 

notice of proposed rulemaking to 

establish two helicopter RNAV routes in 

Northeast United States (76 FR 12643). 

Interested parties were invited to 

participate in this rulemaking effort by 

submitting written comments on the 

proposal. Four people submitted 

comments on the proposal. 

Discussion of Comments 

Two commenters wrote expressing 

support for the proposal. Two 

commenters raised several issues which 

are discussed below. One commenter 

questioned the need for a new type of 

airway for helicopters stating that the 

existing system of VOR Federal airways 

and RNAV T-routes should be 

sufficient. The commenter wrote, in the 

past, the FAA had designated routes for 

helicopters in the northeast, but they 

were seldom available for use. 

Additionally, the commenter asked if 

the air traffic control separation 

standards for IFR helicopters differ from 

those that apply to fixed-wing aircraft; 

contending that, if they are the same, 

there is no need for helicopter airways. 

The past routes noted by the 

commenter were initiated in FAA 

Advisory Circular AC 73–2, ‘‘IFR 

Helicopter Operations in the Northeast 

Corridor,’’ dated June 11, 1979. AC 73– 

2 advised of special RNAV helicopter 

routes between Washington, DC, and 

Boston, MA. The routes were developed 

consistent with conventional traffic 

flows for use by helicopters under IFR 

conditions. Use of these routes was 

limited only to those operators that met 

specified criteria and were issued a 

letter of authorization from the FAA. 

Therefore, the routes were not available 

for general use and they were not 

depicted on IFR Enroute Low Altitude 

charts. The Advisory Circular was 

subsequently cancelled because the 

routes were designed for first generation 

RNAV systems which lacked the 

accuracy and reliability of satellite 

navigation and other advanced RNAV 

systems. Additionally, it was 

determined that the routes do not meet 

current Air Traffic Service route criteria. 

On March 26, 2007, the FAA issued a 

Letter to Airmen containing new 

routings to be filed with a ‘‘fix-to-fix’’ 

flight plan along the ‘‘old’’ IFR northeast 

corridor. As with the Advisory Circular 

routes, these routes are not depicted on 

IFR En route Low Altitude charts. The 

new TK routes in this rule approximate 

the former northeast corridor route 


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