Federal Register / Vol. 76, No. 229 / Tuesday, November 29, 2011 / Rules and Regulations 73481 

otherwise. Only the transmittal letter and 

Chapter 05 List of Effective Pages contain the 

date of Revision 104 of the BAE Systems 

(Operations) Limited BAe 146 Series/Avro 

146–RJ Series AMM. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

Subject 05–10–15, ‘‘Aircraft Equipment 

Airworthiness Limitations,’’ of Chapter 05, 

‘‘Time Limits/Maintenance Checks,’’ of the 

BAE SYSTEMS (Operations) Limited BAe 

146 Series/Avro 146–RJ Series AMM, 

Revision 104, dated April 15, 2011, under 5 

U.S.C. 552(a) and 1 CFR part 51. 

(2) The Director of the Federal Register 

previously approved the incorporation by 

reference of Messier-Dowty Service Bulletin 

146–32–171, dated August 11, 2009, on June 

25, 2010 (75 FR 28463, May 21, 2010). 

(3) For BAE Systems (Operations) Limited 

service information identified in this AD, 

contact BAE Systems (Operations) Limited, 

Customer Information Department, Prestwick 

International Airport, Ayrshire, KA9 2RW, 

Scotland, United Kingdom; telephone +44 

1292 675207; fax +44 1292 675704; email 

RApublications@baesystems.com; Internet 

http://www.baesystems.com/Businesses/ 

RegionalAircraft/index.htm. 

(4) For Messier-Dowty service information 

identified in this AD, contact Messier-Dowty: 

Messier Services Americas, Customer 

Support Center, 45360 Severn Way, Sterling, 

Virginia 20166–8910; telephone (703) 450– 

8233; fax (703) 404–1621; Internet https:// 

techpubs.services/messier-dowty.com. 

(5) 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. 

(6) 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 

November 8, 2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–29804 Filed 11–28–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0720; Directorate 

Identifier 2010–NM–252–AD; Amendment 

39–16867; AD 2011–24–03] 

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 DHC–8–400 

series airplanes. 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: 

There has been one reported incident 

where the main landing gear (MLG) failed to 

extend during testing of the MLG alternate 

release system. Investigation revealed that 

the door release lever bushing was worn, 

causing an increase in the lateral movement 

of the release cable system. An increase in 

free-play within the release cable system 

would cause additional wear to the door 

release lever bushing and may lead to the 

turnbuckle fouling against the nacelle frame. 

The bushing wear at the door release lever 

and turnbuckle fouling could cause a failure 

in the alternate release system, preventing 

the landing gear from extending in the case 

of a failure of the normal MLG extension/ 

retraction system. 

* * * * * 

The unsafe condition is loss of control 

during landing. We are issuing this AD 

to require actions to correct the unsafe 

condition on these products. 

DATES: This AD becomes effective 

January 3, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 3, 2012. 

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: 

Fabio Buttitta, 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– 

7303; 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 August 1, 2011 (76 FR 

45713). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

There has been one reported incident 

where the main landing gear (MLG) failed to 

extend during testing of the MLG alternate 

release system. Investigation revealed that 

the door release lever bushing was worn, 

causing an increase in the lateral movement 

of the release cable system. An increase in 

free-play within the release cable system 

would cause additional wear to the door 

release lever bushing and may lead to the 

turnbuckle fouling against the nacelle frame. 

The bushing wear at the door release lever 

and turnbuckle fouling could cause a failure 

in the alternate release system, preventing 

the landing gear from extending in the case 

of a failure of the normal MLG extension/ 

retraction system. 

This [Transport Canada Civil Aviation] 

directive is to mandate the incorporation of 

a new maintenance task to prevent excessive 

free-play of the turnbuckle and cable within 

the alternate release system. 

The unsafe condition is loss of control 

during landing. 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 

considered the comment received. 

Request To Refer to Revision 

Incorporating Temporary Revision 

Horizon Air Industries, Inc. (the 

commenter) requested that we revise 

paragraph (g) of the NPRM (76 FR 

45713, August 1, 2011) to reference 

Revision 7, dated June 5, 2010, of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual (MRM), PSM 1– 

84–7, instead of Bombardier Temporary 

Revision (TR) MRB–46, dated February 

4, 2010, to Section 1–32, Systems/ 

Powerplant Maintenance Program, of 

the Maintenance Review Board (MRB) 

Report Part 1, of the Bombardier Q400 

Dash 8 MRM, PSM 1–84–7. The 

commenter explained that this TR was 

removed from this MRM by Revision 7 

of this MRM; therefore, this TR does not 

exist. The commenter reasoned that 

referencing Bombardier TR MRB–46 in 

the final rule will force operators to 

request an alternative method of 


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73482 Federal Register / Vol. 76, No. 229 / Tuesday, November 29, 2011 / Rules and Regulations 

compliance to use Revision 7 of this 

MRM, because this TR is no longer 

included in this MRM. The commenter 

suggested that, if the AD must reference 

the same document as Canadian AD CF– 

2010–26, dated August 17, 2010, then a 

paragraph needs to be added to the final 

rule allowing operators to remove this 

TR once it is incorporated into the 

manual by the general revision. 

We agree that operators should be 

allowed to remove Bombardier TR 

MRB–46 once it is included in the 

general revision of the Bombardier 

MRM. Therefore, we have revised this 

final rule to add a note following 

paragraph (g) of this final rule to allow 

operators to remove Bombardier TR 

MRB–46, dated February 4, 2010, once 

it has been included in the general 

revisions of the Bombardier Q400 Dash 

8 MRM. We have revised the final rule 

and re-identified subsequent notes 

accordingly. 

Conclusion 

We reviewed the available data, 

including the comment received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously. 

We determined that these changes will 

not increase the economic burden on 

any operator or increase the scope of the 

AD. 

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 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 

65 products of U.S. registry. We also 

estimate that it will take about 1 workhour 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 to the U.S. operators to 

be $5,525, or $85 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 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 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); 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 AD and placed it in the AD docket. 

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 (76 FR 45713, 

August 1, 2011), 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: 

2011–24–03 Bombardier, Inc.: Amendment 

39–16867. Docket No. FAA–2011–0720; 

Directorate Identifier 2010–NM–252–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective January 3, 2012. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model DHC–8–400, –401, and –402 

airplanes, certificated in any category, having 

serial numbers 4001 and subsequent. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 32: Landing Gear. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

There has been one reported incident 

where the main landing gear (MLG) failed to 

extend during testing of the MLG alternate 

release system. Investigation revealed that 

the door release lever bushing was worn, 

causing an increase in the lateral movement 

of the release cable system. An increase in 

free-play within the release cable system 

would cause additional wear to the door 

release lever bushing and may lead to the 

turnbuckle fouling against the nacelle frame. 

The bushing wear at the door release lever 

and turnbuckle fouling could cause a failure 

in the alternate release system, preventing 

the landing gear from extending in the case 

of a failure of the normal MLG extension/ 

retraction system. 

* * * * * 

The unsafe condition is loss of control during 

landing. 

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 

(g) Within 30 days after the effective date 

of this AD, revise the maintenance program 

by incorporating Task 323400–203 specified 

in Bombardier Temporary Revision (TR) 

MRB–46, dated February 4, 2010, to Section 

1–32, Systems/Powerplant Maintenance 


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Federal Register / Vol. 76, No. 229 / Tuesday, November 29, 2011 / Rules and Regulations 73483 

Program, of the Maintenance Review Board 

(MRB) Report Part 1, of the Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7. The initial compliance time for 

the actions specified in Bombardier TR 

MRB–46, dated February 4, 2010, is within 

6,000 flight hours after the effective date of 

this AD. Thereafter, operate the airplane 

according to the procedures and compliance 

times in Bombardier TR MRB–46, dated 

February 4, 2010. 

Note 1: The revision required by paragraph 

(g) of this AD may be done by inserting a 

copy of Bombardier TR MRB–46, dated 

February 4, 2010, into Section 1–32, 

Systems/Powerplant Maintenance Program, 

of the Maintenance Review Board (MRB) 

Report Part 1, of the Bombardier Q400 Dash 

8 Maintenance Requirements Manual, PSM 

1–84–7. When Bombardier TR MRB–46, 

dated February 4, 2010, has been included in 

general revision of the Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

the Bombardier Q400 Dash 8 Maintenance 

Requirements Manual may be removed from 

Bombardier TR MRB–46, dated February 4, 

2010, provided that the relevant information 

in the general revision is identical to that in 

Bombardier TR MRB–46, dated February 4, 

2010. 

No Alternative Actions, Intervals, and/or 

Critical Design Configuration Control 

Limitations (CDCCLs) 

(h) After accomplishing the revision 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections), 

intervals, and/or CDCCLs may be used unless 

the actions, intervals, and/or CDCCLs are 

approved as an alternative method of 

compliance (AMOC) in accordance with the 

procedures specified in paragraph (i) of this 

AD. 

FAA AD Differences 

Note 2: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(i) 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, 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) 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 

(j) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–26, dated August 17, 

2010; and Bombardier Temporary Revision 

MRB–46, dated February 4, 2010, to Section 

1–32, Systems/Powerplant Maintenance 

Program, of the Maintenance Review Board 

Report Part 1, of the Bombardier Q400 Dash 

8 Maintenance Requirements Manual, PSM 

1–84–7; for related information. 

Material Incorporated by Reference 

(k) You must use Bombardier Temporary 

Revision MRB–46, dated February 4, 2010, to 

Section 1–32, Systems/Powerplant 

Maintenance Program, of the Maintenance 

Review Board Report Part 1, of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7, to do 

the actions required by this AD, unless the 

AD specifies otherwise. 

(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., Q-Series 

Technical Help Desk, 123 Garratt Boulevard, 

Toronto, Ontario M3K 1Y5, Canada; 

telephone (416) 375–4000; fax (416) 375– 

4539; email 

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. 

Issued in Renton, Washington, on 

November 8, 2011. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–29805 Filed 11–28–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0572; Directorate 

Identifier 2011–NM–009–AD; Amendment 

39–16866; AD 2011–24–02] 

RIN 2120–AA64 

Airworthiness Directives; Gulfstream 

Aerospace Corporation Model GV and 

GV–SP Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Gulfstream Aerospace Corporation 

Model GV and GV–SP airplanes. This 

AD was prompted by notification from 

the airplane manufacturer that the third 

fire extinguisher bottle is mounted in a 

small-fragment impact zone. This AD 

requires inspecting to determine 

whether a third Halon fire extinguisher 

bottle is installed in the auxiliary power 

unit (APU) fragment impact zone, 

revising the limitations section of the 

airplane flight manual to add 

restrictions for APU usage for certain 

airplanes having a third fire 

extinguisher bottle, and removing the 

third fire extinguisher bottle from 

certain airplanes. We are issuing this 

AD to prevent penetration of the bottle 

by fragments released due to a failure of 

the APU rotor system. The bottle could 

rupture and cause substantial damage to 

primary airframe structure and primary 

flight controls. 

DATES: This AD is effective January 3, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of January 3, 2012. 

ADDRESSES: For service information 

identified in this AD, contact 

Gulfstream Aerospace Corporation, 

Technical Publications Dept., P.O. Box 

2206, Savannah, Georgia 31402–2206; 

telephone (800) 810–4853; fax (912) 

965–3520; email pubs@gulfstream.com; 

Internet http://www.gulfstream.com/

product_support/technical_pubs/pubs/ 

index.htm. 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:// 


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