Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations 24351 

(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. 

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 airworthiness 

directive (AD): 

2012–08–16 Learjet Inc.: Amendment 39– 

17033; Docket No. FAA–2011–1258; 

Directorate Identifier 2011–NM–184–AD. 

(a) Effective Date 

This AD is effective May 29, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Learjet Inc. Model 60 

airplanes, certificated in any category, serial 

numbers 60–002 through 60–366 inclusive. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 2620, Extinguishing system. 

(e) Unsafe Condition 

This AD was prompted by two incidents of 

swapped fire extinguishing wires, which 

could cause the extinguishing agent of the 

fire extinguishing container to be delivered to 

the wrong engine in the event of an engine 

fire, and a consequent uncontrolled fire. We 

are issuing this AD to correct the unsafe 

condition on these products. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection and Corrective Actions 

At the applicable time specified in 

paragraph (g)(1) or (g)(2) of this AD: Inspect 

the electrical leads routed to the fire 

extinguishing containers for proper 

identification and missing labels, and to 

ensure the electrical leads are connected to 

the correct squibs, as specified in Bombardier 

Service Bulletin 60–26–4, dated May 2, 2011. 

Do the inspection in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 60–26–4, dated May 2, 2011. 

If any misidentification is found, or if any 

label is missing, or if the electrical leads are 

not connected to the correct squibs, as 

specified in Bombardier Service Bulletin 60– 

26–4, dated May 2, 2011: Before further 

flight, do all applicable corrective actions, in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

60–26–4, dated May 2, 2011. 

(1) For airplanes equipped with an APU: 

Within 300 flight hours after the effective 

date of this AD, or at the next auxiliary 

power unit (APU) removal, whichever occurs 

first. 

(2) For airplanes not equipped with an 

APU: Within 300 flight hours after the 

effective date of this AD. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Wichita 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. 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 manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

(2) 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. 

(i) Related Information 

For more information about this AD, 

contact James Galstad, Aerospace Engineer, 

Mechanical Systems and Propulsion Branch, 

ACE–116W, Wichita Aircraft Certification 

Office, FAA, 1801 Airport Road, Room 100, 

Mid-Continent Airport, Wichita, Kansas 

67209; phone: 316–946–4135; fax: 316–946– 

4107; email: james.galstad@faa.gov. 

(j) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) under 

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

following service information: 

(i) Bombardier Service Bulletin 60–26–4, 

dated May 2, 2011. 

(2) For service information identified in 

this AD, contact Learjet, Inc., One Learjet 

Way, Wichita, Kansas 67209–2942; telephone 

316–946–2000; fax 316–946–2220; email 

ac.ict@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/ 

cfr/ibr-locations.html. 

Issued in Renton, Washington, on April 13, 

2012. 

John P. Piccola, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–9557 Filed 4–23–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0036; Directorate 

Identifier 2011–NM–142–AD; Amendment 

39–17028; AD 2012–08–11] 

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 was prompted 

by test reports that showed that failure 

of a retract port flexible hose of a main 

landing gear (MLG) retraction actuator 

could cause excessive hydraulic fluid 

leakage. This AD requires a detailed 

inspection for defects and damage of the 

retract port flexible hose on the left and 

right MLG retraction actuator and 

replacement of the flexible hose if 

needed. We are issuing this AD to detect 

and correct defects and damage of the 

retract port flexible hose which could 

lead to an undamped extension of the 

MLG and could result in MLG structural 

failure, leading to an unsafe asymmetric 

landing configuration. 

DATES: This AD becomes effective May 

29, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of May 29, 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 20590. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

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24352 Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7318; 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 January 23, 2012 (77 FR 

3189). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Testing has shown that in the event of a 

main landing gear (MLG) retraction actuator 

retract port flexible hose failure, in-flight 

vibrations may cause excessive hydraulic 

fluid leakage. This could potentially lead to 

an undamped extension of the MLG, which 

may result in MLG structural failure, leading 

to an unsafe asymmetric landing 

configuration. 

This [Transport Canada Civil Aviation 

(TCCA)] directive mandates the [detailed] 

inspection of the retract port flexible hose 

[for defects and damage] and its replacement 

[installing a new retract port flexible hose], 

when required, to prevent damage to the 

MLG caused by undamped gear extensions. 

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 (77 

FR 3189, January 23, 2012), 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. 

Costs of Compliance 

We estimate that this AD will affect 

81 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 $6,885 or $85 per product. 

In addition, we estimate that any 

necessary follow-on actions would take 

about 4 work-hours and require parts 

costing $0, for a cost of $340 per 

product. We have no way of 

determining the number of products 

that may need these actions. 

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 that 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); 

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. 

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 (77 FR 3189, 

January 23, 2012), 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: 

2012–08–11 Bombardier, Inc.: Amendment 

39–17028. Docket No. FAA–2012–0036; 

Directorate Identifier 2011–NM–142–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective May 29, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Bombardier, Inc. Model 

DHC–8–400, –401, and –402 airplanes; 

certificated in any category; serial numbers 

4001 and subsequent. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 32: Landing Gear. 

(e) Reason 

This AD was prompted by test reports that 

showed that failure of a retract port flexible 

hose of a main landing gear (MLG) retraction 

actuator could cause excessive hydraulic 

fluid leakage. We are issuing this AD to 

detect and correct defects and damage of the 

retract port flexible hose which could lead to 

an undamped extension of the MLG and 

could result in MLG structural failure, 

leading to an unsafe asymmetric landing 

configuration. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Actions 

Within 600 flight hours after the effective 

date of this AD, do a detailed inspection for 

defects and damage of the retract port flexible 

hose of the left and right MLG retraction 

actuators, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–32–89, dated March 22, 

2011. Repeat the inspection thereafter at 

intervals not to exceed 600 flight hours. If 

any defect or damage is found, before further 

flight, replace the retract port flexible hose 

with a new or serviceable retract port flexible 

hose in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–32–89, dated March 22, 

2011. 

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Federal Register / Vol. 77, No. 79 / Tuesday, April 24, 2012 / Rules and Regulations 24353 

(h) Other FAA AD Provisions 

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. 

(i) Related Information 

Refer to MCAI Canadian Airworthiness 

Directive CF–2011–14, dated June 17, 2011; 

and Bombardier Service Bulletin 84–32–89, 

dated March 22, 2011; for related 

information. 

(j) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) of the 

following service information under 5 U.S.C. 

552(a) and 1 CFR part 51: 

(i) Bombardier Service Bulletin 84–32–89, 

dated March 22, 2011. 

(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 an NARA facility, 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 April 11, 

2012. 

John P. Piccola, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–9472 Filed 4–23–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1095; Directorate 

Identifier 2010–NM–241–AD; Amendment 

39–17032; AD 2012–08–15] 

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 CL–600–2B16 

(CL–604 Variant) airplanes. This AD 

was prompted by multiple reports of 

short circuit events during pre-delivery 

inspections and test flights, one of 

which resulted in smoke in the cockpit. 

This AD requires replacing or relocating 

of certain circuit breaker panel (CBP) 

bus bars on certain airplanes, inspecting 

for any loose or improperly crimped 

lugs in certain electrical panel locations 

and replacement if necessary, and 

inspection for foreign object damage in 

certain areas and removal if necessary. 

We are issuing this AD to prevent 

arcing, damage to adjacent structure, 

smoke in the cockpit, or loss of system 

redundancies. 

DATES: This AD becomes effective May 

29, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of May 29, 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: 

Assata Dessaline, Aerospace Engineer, 

Avionics and Flight Test Branch, ANE– 

172, New York Aircraft Certification 

Office (ACO), FAA, 1600 Stewart Ave., 

Suite 410, Westbury, NY 11590; 

telephone (516) 228–7301; 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 October 26, 2011 (76 FR 

66203). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

During pre-delivery inspections and test 

flights, several short circuit events were 

reported, one of which resulted in smoke in 

the cockpit. There were no in-service 

incidents. 

Investigations have identified three 

conditions affecting the wiring of Circuit 

Breaker Panels 1, 2, 3 and 4 (CBP–1, CBP– 

2, CBP–3, and CBP–4) and Junction Boxes 17 

and 18 (JB17 and JB18), which would lead to 

short circuiting: 

1. In CBP–1, there may be low clearance 

between specific bus bars and the circuit 

breaker panel structure. 

2. Some nickel-plated terminal lugs, size 

number 22–20 with a green insulating sleeve, 

may not have been manufactured to 

applicable standards. These terminal lugs 

may have been installed in CBP–1, CBP–2, 

CBP–3, CBP–4, JB17 and JB18. This 

manufacturing defect affects the mechanical 

hold of the wire in the crimped lug barrel. 

3. In JB17, JB18 and the above-mentioned 

CBPs, foreign object debris (FOD) may be 

found. 

If not corrected, these conditions could 

result in arcing, damage to adjacent structure, 

smoke in the cockpit, or loss of system 

redundancies. 

This TCCA directive is issued to mandate 

the replacement or relocation of the specific 

CBP–1 bus bars, the [detailed] inspection, 

and rework if necessary, of any loose or 

improperly crimped lugs in CBP–1, CBP–2, 

CBP–3, CBP–4, JB17 and JB18, and to ensure 

there is no FOD in the affected areas [via a 

general visual inspection for FOD, and 

removal 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 

considered the comment received. 

Request To Change Applicability 

Bombardier, Inc. requested the 

applicability be revised to remove the 

CL–601–3A and CL–601–3R Variant 

airplanes, since only the CL–604 Variant 

is affected. 

We agree because only the CL–604 

Variant is affected. We have changed the 

preamble and paragraph (c) of this final 

rule to specify only the CL–604 Variant. 

Conclusion 

We reviewed the available data, 

including the comment received, and 

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