Federal Register / Vol. 76, No. 92 / Thursday, May 12, 2011 / Proposed Rules 27617 

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 New York ACO, send it 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 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. 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 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. 

Related Information 

(k) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–23, dated July 21, 2010; 

Bombardier Service Bulletin 84–32–74, 

Revision A, dated May 17, 2010; for related 

information. 

Issued in Renton, Washington, on May 5, 

2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–11604 Filed 5–11–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0471; Directorate 

Identifier 2010–NM–219–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 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: 

Several operators have reported pitch 

oscillations and/or elevator asymmetry 

caution lights illumination when flying with 

the autopilot engaged. Investigations revealed 

that loose rivets in the torque tube assemblies 

caused relative motion between the crank 

arms and torque tubes. 

Loose rivets could result in excessive wear 

and subsequent significant backlash in the 

driving crank arms. This condition, if left 

uncorrected, will progressively get worse and 

degrade the controllability of the aeroplane. 

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 June 27, 2011. 

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 W12–40, 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., Q–Series Technical Help Desk, 123 

Garratt Boulevard, Toronto, Ontario 

M3K 1Y5, Canada; telephone 416–375– 

4000; fax 416–375–4539; e-mail 

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. 

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: 

Cathy Nguyen-Quoc, 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– 

7323; 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–2011–0471; Directorate Identifier 

2010–NM–219–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–2010–27, 

dated August 20, 2010 (referred to after 

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

condition for the specified products. 

The MCAI states: 

Several operators have reported pitch 

oscillations and/or elevator asymmetry 

caution lights illumination when flying with 

the autopilot engaged. Investigations revealed 

that loose rivets in the torque tube assemblies 

caused relative motion between the crank 

arms and torque tubes. 

Loose rivets could result in excessive wear 

and subsequent significant backlash in the 

driving crank arms. This condition, if left 

uncorrected, will progressively get worse and 

degrade the controllability of the aeroplane. 

Required actions include doing an 

inspection for the part number of the 

left and right elevator torque tube 

assemblies and, if necessary, replacing 

the elevator torque tube assembly or 

replacing the elevator torque tube rivets, 

and re-identifying the assemblies. You 

may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

Bombardier Inc., has issued Service 

Bulletin 84–27–50, Revision C, dated 

July 26, 2010. The actions described in 

this service information are intended to 


wwoods2 on DSK1DXX6B1PROD with PROPOSALS_PART 1
27618 Federal Register / Vol. 76, No. 92 / Thursday, May 12, 2011 / Proposed Rules 

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 66 products of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection ........................................................ 2 × $85 per hour = $170 ................................. None ............ $170 $11,220 

We estimate the following costs to do 

any necessary replacements that would 

be required based on the results of the 

proposed inspection. We have no way of 

determining the number of aircraft that 

might need these replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace left torque tube ............................................... 15 work-hours × $85 per hour = $1,275 ...................... $4,354 $5,629 

Replace right torque tube ............................................. 15 work-hours × $85 per hour = $1,275 ...................... 5,913 7,188 

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.: Docket No. FAA–2011– 

0471; Directorate Identifier 2010–NM– 

219–AD. 

Comments Due Date 

(a) We must receive comments by June 27, 

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; serial 

numbers 4001 through 4305 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 27: Flight controls. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Several operators have reported pitch 

oscillations and/or elevator asymmetry 


wwoods2 on DSK1DXX6B1PROD with PROPOSALS_PART 1
Federal Register / Vol. 76, No. 92 / Thursday, May 12, 2011 / Proposed Rules 27619 

caution lights illumination when flying with 

the autopilot engaged. Investigations revealed 

that loose rivets in the torque tube assemblies 

caused relative motion between the crank 

arms and torque tubes. 

Loose rivets could result in excessive wear 

and subsequent significant backlash in the 

driving crank arms. This condition, if left 

uncorrected, will progressively get worse and 

degrade the controllability of the aeroplane. 

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. 

Inspection for Part Number 

(g) At the applicable times identified in 

paragraphs (g)(1) and (g)(2) of this AD, do an 

inspection to determine the part numbers of 

the left and right elevator torque tubes, in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–27–50, Revision C, dated July 26, 2010. A 

review of airplane maintenance records is 

acceptable in lieu of this inspection if the 

part numbers of the left and right elevator 

torque tubes can be conclusively determined 

from that review. 

(1) For airplanes that have accumulated 

8,000 or more total flight hours as of the 

effective date of this AD: Within 2,000 flight 

hours after the effective date of this AD. 

(2) For airplanes that have accumulated 

less than 8,000 total flight hours as of the 

effective date of this AD: Within 6,000 flight 

hours after the effective date of this AD, but 

before the accumulation of 10,000 total flight 

hours. 

Corrective Actions 

(h) If, as a result of the inspection required 

by paragraph (g) of this AD, any left elevator 

torque tube has part number (P/N) 82760709– 

009, at the applicable time in paragraph (g)(1) 

or (g)(2) of this AD, do the actions in 

paragraph (h)(1) or (h)(2) of this AD. 

(1) Replace the elevator torque tube with a 

new elevator torque tube having P/N 

82760709–011, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–27–50, Revision C, dated 

July 26, 2010. 

(2) Replace the rivets in each elevator 

torque tube assembly with Hi Lite pins 

having P/N B0206001AG8 and collars having 

P/N HST1070CY, and re-identify the elevator 

torque tube assembly having P/N 82760709– 

009, in accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–27–50, Revision C, dated July 26, 2010. 

(i) If, as a result of the inspection required 

by paragraph (g) of this AD, any right elevator 

torque tube has P/N 82760757–009, at the 

applicable time in paragraph (g)(1) or (g)(2) 

of this AD, do the actions in paragraph (i)(1) 

or (i)(2) of this AD. 

(1) Replace the elevator torque tube with a 

new elevator torque tube having P/N 

82760757–011, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–27–50, Revision C, dated 

July 26, 2010. 

(2) Replace the rivets in each elevator 

torque tube assembly with Hi Lite pins 

having P/N B0206001AG8 and collars having 

P/N HST1070CY, and re-identify the elevator 

torque tube assembly having P/N 82760757– 

009, in accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–27–50, Revision C, dated July 26, 2010. 

Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(j) Actions done before the effective date of 

this AD, in accordance with the service 

bulletins listed in table 1 of this AD, are 

considered acceptable for compliance with 

the corresponding action specified in this 

AD. 

TABLE 1—CREDIT SERVICE BULLETINS

Service Bulletin Revision Date 

Bombardier Service Bulletin 84–27–50 ....................................................................................... Original ........................ March 3, 2010. 

Bombardier Service Bulletin 84–27–50 ....................................................................................... A .................................. April 28, 2010. 

Bombardier Service Bulletin 84–27–50 ....................................................................................... B .................................. May 19, 2010. 

Parts Installation 

(k) As of the effective date of this AD, no 

person may install on any airplane an 

elevator torque tube assembly having P/N 

82760709–009 or 82760757–009. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(l) 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 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 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. 

Related Information 

(m) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–27, dated August 20, 

2010; and Bombardier Service Bulletin 84– 

27–50, Revision C, dated July 26, 2010; for 

related information. 

Issued in Renton, Washington, on May 5, 

2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–11605 Filed 5–11–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2011–0444 Airspace 

Docket No. 11–AAL–07] 

Proposed Revision of Class E 

Airspace; Talkeetna, AK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to revise 

Class E airspace at Talkeetna, AK. The 

revision of four Standard Instrument 

Approach Procedures (SIAPs) and the 

Obstacle Departure Procedure (ODP) at 

the Talkeetna Airport has made this 

action necessary to enhance safety and 

management of Instrument Flight Rules 

(IFR) operations. 

DATES: Comments must be received on 

or before June 27, 2011. 

ADDRESSES: Send comments on the 

proposal to the Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 


wwoods2 on DSK1DXX6B1PROD with PROPOSALS_PART 1