This section of the FEDERAL REGISTER

contains regulatory documents having general

applicability and legal effect, most of which

are keyed to and codified in the Code of

Federal Regulations, which is published under

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Rules and Regulations Federal Register

56277 

Vol. 76, No. 177 

Tuesday, September 13, 2011 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0381; Directorate 

Identifier 2010–NM–203–AD; Amendment 

39–16799; AD 2011–18–17] 

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: 

Several reports have been received on 

failures of the main landing gear (MLG) 

stabilizer extension springs. A landing gear 

audit has confirmed that the MLG may not 

lock in the down-lock position with the 

absence of both MLG stabilizer extension 

springs. The loss of the locking mechanism 

could result in the collapse of the main 

landing gear. 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

October 18, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of October 18, 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: 

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 April 19, 2011 (76 FR 

21820). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Several reports have been received on 

failures of the main landing gear (MLG) 

stabilizer extension springs. A landing gear 

audit has confirmed that the MLG may not 

lock in the down-lock position with the 

absence of both MLG stabilizer extension 

springs. The loss of the locking mechanism 

could result in the collapse of the main 

landing gear. 

This [TCCA] directive is to mandate the 

incorporation of a new maintenance task for 

the MLG stabilizer extension springs. 

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 Reference Latest Revision of 

the Maintenance Review Board Report 

Merle Mattson requested that we 

revise paragraph (g) of the NPRM (76 FR 

21820, April 19, 2011), to reference the 

latest permanent revision of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7, 

rather than Bombardier Temporary 

Revision (TR) MRB–45, dated October 6, 

2009, to Section 1–32, Systems/ 

Powerplant Maintenance Program, of 

Part 1 of the Maintenance Review Board 

Report of the Bombardier Q400 Dash 8 

Maintenance Requirements Manual, 

PSM 1–84–7, for Task 320100–213. The 

commenter suggested an option of 

adding a note allowing the removal of 

Bombardier TR MRB–45, dated October 

6, 2009, when it is incorporated into 

Section 1–32, Systems/Powerplant 

Maintenance Program, of Part 1 of the 

Maintenance Review Board Report of 

the Bombardier Q400 Dash 8 

Maintenance Requirements Manual, 

PSM 1–84–7, through a general revision. 

The commenter stated that the proposed 

NPRM would force operators to go back 

to the manufacturer for a copy of 

Bombardier TR MRB–45, dated October 

6, 2009, because that TR was discarded 

at the incorporation of permanent 

Revision 7, dated June 2010, of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7. 

We agree with the request to add a 

note to allow the removal of Bombardier 

TR MRB–45, dated October 6, 2009, 

when the information in that TR is 

included in the general revision of Part 

1 of the Maintenance Review Board 

Report of the Bombardier Q400 Dash 8 

Maintenance Requirements Manual, 

PSM 1–84–7. We have added Note 1 to 

this AD to specify that the general 

revisions may be inserted into Section 

1–32, Systems/Powerplant Maintenance 

Program, of Part 1 of Maintenance 

Review Board Report of the Bombardier 

Q400 Dash 8 Maintenance Requirements 

Manual, PSM 1–84–7, provided the 

relevant information in the general 

revisions is identical to that in 

Bombardier TR MRB–45, dated October 

6, 2009. 

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 change described previously. 

We determined that this change 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. 

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56278 Federal Register / Vol. 76, No. 177 / Tuesday, September 13, 2011 / Rules and Regulations 

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 21820, April 

19, 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: 

2011–18–17 Bombardier, Inc.: Amendment 

39–16799. Docket No. FAA–2011–0381; 

Directorate Identifier 2010–NM–203–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective October 18, 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, 4003 and subsequent. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 32: Landing Gear. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Several reports have been received on 

failures of the main landing gear (MLG) 

stabilizer extension springs. A landing gear 

audit has confirmed that the MLG may not 

lock in the down-lock position with the 

absence of both MLG stabilizer extension 

springs. The loss of the locking mechanism 

could result in the collapse of the main 

landing gear. 

* * * * * 

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 320100–213 as 

specified in Bombardier Temporary Revision 

(TR) MRB–45, dated October 6, 2009, to 

Section 1–32, Systems/Powerplant 

Maintenance Program, of Part 1 of the 

Maintenance Review Board Report of the 

Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7. The 

initial compliance time for Task 320100–213 

is within 600 flight hours after the effective 

date of this AD. 

Note 1: The actions required by paragraph 

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

copy of Bombardier TR MRB–45, dated 

October 6, 2009, into Section 1–32, Systems/ 

Powerplant Maintenance Program, of Part 1 

of the Maintenance Review Board Report of 

the Bombardier Q400 Dash 8 Maintenance 

Requirements Manual, PSM 1–84–7. When 

this TR has been included in the general 

revisions of Part 1 of the Maintenance 

Review Board Report of the Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7, the general revisions may be 

inserted in Part 1 of the Maintenance Review 

Board Report of the Bombardier Q400 Dash 

8 Maintenance Requirements Manual, PSM 

1–84–7, provided the relevant information in 

the general revisions is identical to that in 

Bombardier TR MRB–45, dated October 6, 

2009. 

No Alternative Actions or Intervals 

(h) After accomplishing the revision 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections) or 

intervals may be used unless the actions or 

intervals are approved as an alternative 

method of compliance (AMOC) in 

accordance with the procedures specified in 

paragraph (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 ACO, 

ANE–170, FAA, 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 

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Federal Register / Vol. 76, No. 177 / Tuesday, September 13, 2011 / Rules and Regulations 56279 

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 Transport Canada Civil 

Aviation (TCCA) Airworthiness Directive 

CF–2010–22, dated July 20, 2010; and 

Bombardier Temporary Revision MRB–45, 

dated October 6, 2009, to Section 1–32, 

Systems/Powerplant Maintenance Program, 

of Part 1 of the Maintenance Review Board 

Report 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–45, dated October 6, 2009, to 

Section 1–32, Systems/Powerplant 

Maintenance Program, of Part 1 of the 

Maintenance Review Board Report 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; 

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. 

Issued in Renton, Washington, on August 

23, 2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–22278 Filed 9–12–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0917; Directorate 

Identifier 2011–NM–157–AD; Amendment 

39–16806; AD 2011–19–01] 

RIN 2120–AA64 

Airworthiness Directives; Airbus Model 

A318, A319, A320, and A321 Series 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above that would 

supersede an existing AD. 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: 

In service experience has shown a number 

of events of pin to socket arcing at the 

Integrated Drive Generator (IDG) feeder cable 

pylon/nacelle interface connector. The 

fretting corrosion phenomenon was 

identified to be the root cause of the pin to 

socket arcing. 

Investigation has identified a nonoptimised electrical harness installation as a 

contributing factor to this phenomenon that 

could lead to electrical arcs with possible 

electrical flickering. 

* * * * * 

[S]ome operators reported cases of Display 

Unit (DU) flickering, despite the fact that the 

engines installed did not belong to the 

affected batch, and that these aeroplanes had 

been modified to incorporate one of * * * 

two terminating actions, * * *. 

[S]ome intermittent electrical power 

supply interruptions may not be detectable 

by the electrical power monitoring system, 

thereby preventing an automatic 

disconnection of the failed generator. 

* * * * * 

The unsafe condition is transient loss of 

certain systems, which could result in 

the reduced ability of the flightcrew to 

cope with adverse flight conditions. 

This AD requires actions that are 

intended to address the unsafe 

condition described in the MCAI. 

DATES: This AD becomes effective 

September 28, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of September 28, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain other publications listed in 

the AD as of August 13, 2004 (69 FR 

45243, July 29, 2004). 

We must receive comments on this 

AD by October 28, 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 

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

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

p.m., Monday through Friday, except 

Federal holidays. 

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 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: 

Sanjay Ralhan, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–1405; fax (425) 227–1149. 

SUPPLEMENTARY INFORMATION:

Discussion 

On July 16, 2004, we issued AD 2004– 

15–14, Amendment 39–13748 (69 FR 

45243, July 29, 2004), which 

corresponded to Direction Ge ́ne ́rale de 

l’Aviation Civile (DGAC) (the aviation 

authority for France) AD F–2004–074, 

dated May 26, 2004. That FAA AD 

required revising the airplane flight 

manual (AFM) to include a procedure 

intended to address an unsafe condition 

on Airbus Model A319–131, –132, and 

–133; A320–231, –232, and –233; and 

A321–131 and –231 series airplanes 

except those airplanes on which Airbus 

Modification 32943 has been 

incorporated in production. That FAA 

AD also required an inspection of the 

firewall connector for signs of arcing if 

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