27476 Federal Register / Vol. 74, No. 110 / Wednesday, June 10, 2009 / Proposed Rules 

FAA AD Differences 

NOTE 1: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(h) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office, 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: Christopher 

Alfano, Aerospace Engineer, Airframe and 

Mechanical Systems Branch, ANE–171, FAA, 

New York Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, New 

York 11590; telephone (516) 228–7340; fax 

(516) 794–5531. Before using any approved 

AMOC on any airplane to which the AMOC 

applies, notify your principal maintenance 

inspector (PMI) or principal avionics 

inspector (PAI), as appropriate, or lacking a 

principal inspector, your local Flight 

Standards District Office. 

(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 FAA-approved 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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act, 

the Office of Management and Budget (OMB) 

has approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(i) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–02, dated January 19, 

2009; and Bombardier Service Bulletin 601R– 

11–088, Revision ‘A,’ dated March 24, 2009; 

for related information. 

Issued in Renton, Washington, on June 2, 

2009. 

Stephen P. Boyd, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–13506 Filed 6–9–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0526; Directorate 

Identifier 2009–NM–029–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier 

Model DHC–8–400 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

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: 

Four aircraft have experienced a dual AC 

generator shutdown, caused by a broken 

propeller de-ice bus bar which shortcircuited with the backplate assembly. 

* * * A short circuit can cause a dual AC 

generator shutdown that, particularly in 

conjunction with an engine failure in icing 

conditions, could result in reduced 

controllability of the aircraft. 

* * * * * 

Reduced controllability of the airplane 

in certain operating conditions affects 

continued safe flight and landing. The 

proposed AD would require actions that 

are intended to address the unsafe 

condition described in the MCAI. 

DATES: We must receive comments on 

this proposed AD by July 10, 2009. 

ADDRESSES: You may send comments 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: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC, between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed 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.qseries@aero.bombardier.com; 

Internet http://www.bombardier.com. 

You may review copies of the 

referenced 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 or 425–227–1152. 

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 this proposed 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. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Wing Chan, Aerospace Engineer, 

Aerospace Engineer, Systems and Flight 

Test Branch, ANE–172, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7311; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2009–0526; Directorate Identifier 

2009–NM–029–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 based on 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 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2009–01, 

dated January 19, 2009 (referred to after 

this as ‘‘the MCAI’’), to correct an unsafe 

condition for the specified products. 

The MCAI states: 

Four aircraft have experienced a dual AC 

generator shutdown, caused by a broken 

propeller de-ice bus bar which shortcircuited with the backplate assembly. 

It was subsequently determined that any 

friction or contact between a propeller de-ice 

bus bar and the backplate assembly can cause 

an intermittent short circuit. Such a short 

circuit can cause a dual AC generator 

shutdown that, particularly in conjunction 

with an engine failure in icing conditions, 

could result in reduced controllability of the 

aircraft. 

This directive mandates revision of the 

Airplane Flight Manual (AFM) to introduce 

a procedure that restores AC power following 

a failure of No. 1 and No. 2 AC generators 

with propeller de-ice on. Additionally, in 


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Federal Register / Vol. 74, No. 110 / Wednesday, June 10, 2009 / Proposed Rules 27477 

order to prevent similar dual AC generator 

shutdowns, it mandates the application of 

sealant as insulation between the propeller 

de-ice bus bars and the backplate assembly. 

Reduced controllability of the airplane 

in certain operating conditions affects 

continued safe flight and landing. You 

may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

Bombardier has issued Service 

Bulletin 84–61–03, Revision ‘A,’ dated 

September 18, 2008; and Bombardier 

Temporary Amendment (TA) 14, Issue 

1, dated May 10, 2006, to the Dash 8 

Q400 Airplane Flight Manual PSM 1– 

84–1A. The actions described in this 

service information are intended to 

correct the unsafe condition identified 

in the MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with the State of 

Design Authority, we have been notified 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all pertinent 

information and determined an unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

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 proposed 

different actions in this AD from those 

in the MCAI in order to follow FAA 

policies. Any such differences are 

highlighted in a NOTE within the 

proposed AD. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 62 products of U.S. registry. 

We also estimate that it would take 

about 6 work-hours per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $80 per work-hour. Based on 

these figures, we estimate the cost of the 

proposed AD on U.S. operators to be 

$29,760, or $480 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 

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); and 

3. 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD and placed it in the 

AD docket. 

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 AD: 

Bombardier, Inc. (Formerly de Havilland, 

Inc.): Docket No. FAA–2009–0526; 

Directorate Identifier 2009–NM–029–AD. 

Comments Due Date 

(a) We must receive comments by July 10, 

2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier Model 

DHC–8–400, DHC–8–401, and DHC–8–402 

airplanes, certificated in any category, serial 

numbers 4001, 4003, 4004, 4006, and 4008 

through 4154 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 61: Propellers/Propulsors. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Four aircraft have experienced a dual AC 

generator shutdown, caused by a broken 

propeller de-ice bus bar which shortcircuited with the backplate assembly. 

It was subsequently determined that any 

friction or contact between a propeller de-ice 

bus bar and the backplate assembly can cause 

an intermittent short circuit. Such a short 

circuit can cause a dual AC generator 

shutdown that, particularly in conjunction 

with an engine failure in icing conditions, 

could result in reduced controllability of the 

aircraft. 

This directive mandates revision of the 

Airplane Flight Manual (AFM) to introduce 

a procedure that restores AC power following 

a failure of No. 1 and No. 2 AC generators 

with propeller de-ice on. Additionally, in 

order to prevent similar dual AC generator 

shutdowns, it mandates the application of 

sealant as insulation between the propeller 

de-ice bus bars and the backplate assembly. 

Reduced controllability of the airplane in 

certain operating conditions affects 

continued safe flight and landing. 

Actions and Compliance 

(f) Unless already done, do the following 

actions. 

(1) Within 30 days after the effective date 

of this AD, revise the Limitations section of 

the AFM by inserting a copy of Bombardier 

Temporary Amendment (TA) 14, Issue 1, 

dated May 10, 2006, to the Dash 8 Q400 AFM 

PSM 1–84–1A. When the information in 

Bombardier TA 14, Issue 1, dated May 10, 

2006, is included in the general revisions of 

the AFM, the general revisions may be 

inserted in the AFM and the TA may be 

removed. 


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27478 Federal Register / Vol. 74, No. 110 / Wednesday, June 10, 2009 / Proposed Rules 

(2) Within 5,000 flight hours after the 

effective date of this AD: Apply sealant 

between the bus bar assemblies and the 

backplate assembly by incorporating 

Modsum 4W163047, Revision B, dated 

August 11, 2008, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–61–03, Revision ‘A,’ 

dated September 18, 2008. 

(3) Incorporating Bombardier DHC–8–S400 

Modification Summary Package 4W163047 

before the effective date of this AD in 

accordance with Bombardier Service Bulletin 

84–61–03, dated April 27, 2007, is 

considered acceptable for compliance with 

the requirements of paragraph (f)(2) of this 

AD. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (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: Wing 

Chan, Aerospace Engineer, Aerospace 

Engineer, Systems and Flight Test Branch, 

ANE–172, FAA, New York ACO, 1600 

Stewart Avenue, Suite 410, Westbury, New 

York 11590; telephone (516) 228–7311; fax 

(516) 794–5531. Before using any approved 

AMOC on any airplane to which the AMOC 

applies, notify your principal maintenance 

inspector (PMI) or principal avionics 

inspector (PAI), as appropriate, or lacking a 

principal inspector, your local Flight 

Standards District Office. 

(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 FAA-approved 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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act, 

the Office of Management and Budget (OMB) 

has approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(h) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–01, dated January 19, 

2009; and Bombardier Service Bulletin 84– 

61–03, Revision ‘A,’ dated September 18, 

2008; for related information. 

Issued in Renton, Washington, on June 2, 

2009. 

Stephen P. Boyd, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E9–13505 Filed 6–9–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF HOMELAND 

SECURITY 

Coast Guard 

33 CFR Part 100 

[USCG–2009–0436] 

RIN 1625–AA08 

Special Local Regulations; Great 

Lakes Annual Marine Events 

AGENCY: Coast Guard, DHS. 

ACTION: Notice of proposed rulemaking. 

SUMMARY: The Coast Guard proposes to 

amend special local regulations for 

annual regattas and marine parades in 

the Captain of the Port Buffalo zone. 

This action is necessary to protect the 

public and participants from hazards 

associated with regattas and marine 

parades. This proposed rule is intended 

to ensure safety of life on the navigable 

waters immediately prior to, during, and 

immediately after regattas or marine 

parades. 

DATES: Comments and related materials 

must reach the Coast Guard on or before 

July 10, 2009. 

ADDRESSES: You may submit comments 

identified by Coast Guard docket 

number USCG–2009–0436 to the Docket 

Management Facility at the U.S. 

Department of Transportation. To avoid 

duplication, please use only one of the 

following methods: 

(1) Online: http:// 

www.regulations.gov. 

(2) Mail: Docket Management Facility 

(M–30), U.S. Department of 

Transportation, West Building Ground 

Floor, Room W12–140, 1200 New Jersey 

Avenue, SE., Washington, DC 20590– 

0001. 

(3) Hand delivery: Room W12–140 on 

the Ground Floor of the West Building, 

1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The telephone 

number is 202–366–9329. 

(4) Fax: 202–493–2251. 

FOR FURTHER INFORMATION CONTACT: CDR 

Joseph Boudrow, Prevention Dept. 

Chief, Sector Buffalo, 1 Fuhrmann 

Blvd., Buffalo, NY 14203; 716–843– 

9385. 

SUPPLEMENTARY INFORMATION: 

I. Public Participation and Request for 

Comments 

We encourage you to participate in 

this rulemaking by submitting 

comments and related materials. All 

comments received will be posted, 

without change, to http:// 

www.regulations.gov and will include 

any personal information you have 

provided. We have an agreement with 

the Department of Transportation (DOT) 

to use the Docket Management Facility. 

Please see DOT’s ‘‘Privacy Act’’ 

paragraph below. 

A. Submitting Comments 

If you submit a comment, please 

include the docket number for this 

rulemaking (USCG–2009–0436), 

indicate the specific section of this 

document to which each comment 

applies, and give the reason for each 

comment. We recommend that you 

include your name, mailing address, 

and an e-mail address or other contact 

information in the body of your 

document to ensure that you can be 

identified as the submitter. This also 

allows us to contact you in the event 

further information is needed or if there 

are questions. For example, if we cannot 

read your submission due to technical 

difficulties and you cannot be 

contacted, your submission may not be 

considered. You may submit your 

comments and material by electronic 

means, mail, fax, or delivery to the 

Docket Management Facility at the 

address under ADDRESSES; but please 

submit your comments and material by 

only one means. If you submit them by 

mail or delivery, submit them in an 

unbound format, no larger than 81⁄2 by 

11 inches, suitable for copying and 

electronic filing. If you submit them by 

mail and would like to know that they 

reached the Facility, please enclose a 

stamped, self-addressed postcard or 

envelope. We will consider all 

comments and material received during 

the comment period. We may change 

this proposed rule in view of them. 

B. Viewing Comments and Documents 

To view comments, as well as 

documents mentioned in this preamble 

as being available in the docket, go to 

http://www.regulations.gov at any time, 

click on ‘‘Search for Dockets,’’ and enter 

the docket number for this rulemaking 

(USCG–2009–0436) in the Docket ID 

box, and click enter. You may also visit 

the Docket Management Facility in 

Room W12–140 on the ground floor of 

the DOT West Building, 1200 New 

Jersey Avenue, SE., Washington, DC 

20590, between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. 

C. Privacy Act 

Anyone can search the electronic 

form of all comments received into any 

of our dockets by the name of the 

individual submitting the comment (or 

signing the comment, if submitted on 


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