Federal Register / Vol. 75, No. 216 / Tuesday, November 9, 2010 / Rules and Regulations 68695 

Avenue, SW., Renton, Washington 98057– 

3356; telephone (425) 227–1175; fax (425) 

227–1149. 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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(k) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) European 

Aviation Safety Agency (EASA) 

Airworthiness Directive 2009–0265, dated 

December 16, 2009, and Airbus Mandatory 

Service Bulletin A380–36–8009, dated 

December 7, 2009, for related information. 

Material Incorporated by Reference 

(l) You must use Airbus Mandatory Service 

Bulletin A380–36–8009, including Service 

Bulletin Report Sheet, dated December 7, 

2009, 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 Airbus SAS—EANA 

(Airworthiness Office); 1 Rond Point Maurice 

Bellonte, 31707 Blagnac Cedex, France; 

telephone +33 562 110 253; Fax +33 562 110 

307; e-mail account.airworthA380@airbus.com; Internet http:// 

www.airbus.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 October 

26, 2010. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–28166 Filed 11–8–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–1106; Directorate 

Identifier 2010–NM–237–AD; Amendment 

39–16508; AD 2010–23–19] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model CL–600–2C10 (Regional Jet 

Series 700, 701, & 702), Model CL–600– 

2D15 (Regional Jet Series 705), and 

Model CL–600–2D24 (Regional Jet 

Series 900) 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. 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: 

Two cases of main landing gear (MLG) 

failure to fully extend have been reported. An 

MLG failing to extend may result in an 

unsafe asymmetric landing configuration. 

Preliminary investigation has shown that 

interference between the MLG door and the 

MLG fairing seal prevented the MLG door 

from opening. 

* * * * * 

The unsafe condition is possible loss of 

controllability of the airplane during 

landing. This AD requires actions that 

are intended to address the unsafe 

condition described in the MCAI. 

DATES: This AD becomes effective 

November 24, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of November 24, 2010. 

We must receive comments on this 

AD by December 27, 2010. 

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: 

Fabio Buttitta, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office (ACO), 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7303; fax (516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Discussion 

Transport Canada Civil Aviation, 

which is the aviation authority for 

Canada, has issued Canadian 

Airworthiness Directive CF–2010–36, 

dated October 18, 2010 (referred to after 

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

condition for the specified products. 

The MCAI states: 

Two cases of main landing gear (MLG) 

failure to fully extend have been reported. An 

MLG failing to extend may result in an 

unsafe asymmetric landing configuration. 

Preliminary investigation has shown that 

interference between the MLG door and the 

MLG fairing seal prevented the MLG door 

from opening. 

This [Canadian airworthiness] directive 

mandates [repetitive detailed] inspection[s 

for damage] and rectification, as required, of 

the MLG fairing and seal, MLG door, and 

adjacent structures. 

The unsafe condition is possible loss of 

controllability of the airplane during 

landing. Damage includes the following: 

• Wear lines, cracks, fraying, tears, 

and evidence of chafing of the rubber 

seal of the MLG fairing; 

• Missing and broken rollers, loose 

and missing fasteners, and damaged and 

missing stops of the MLG inboard doors; 


wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
68696 Federal Register / Vol. 75, No. 216 / Tuesday, November 9, 2010 / Rules and Regulations 

and damage along the edge of the MLG 

inboard door adjacent to the MLG 

fairing; 

• Missing forward and aft stops, loose 

and missing fasteners of the MLG 

fairing; and damage along the edge of 

the MLG fairing adjacent to the MLG 

door; and 

• Missing stops, loose and missing 

fasteners, and missing wedges of the 

stops and wedge on the forward and aft 

spars. 

Rectification (i.e., corrective actions) 

includes replacing the rubber seal or 

removing the MLG inboard door, and 

contacting Bombardier for repair 

instructions and doing the repair. You 

may obtain further information by 

examining the MCAI in the AD docket. 

Relevant Service Information 

Bombardier has issued Alert Service 

Bulletin A670BA–32–030, Revision A, 

including Appendix A, dated October 

22, 2010. 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 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 issuing this 

AD because we evaluated all pertinent 

information and determined the unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between the 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 FAA policies. 

Any such differences are highlighted in 

a NOTE within the AD. 

FAA’s Determination of the Effective 

Date 

An unsafe condition exists that 

requires the immediate adoption of this 

AD. The FAA has found that the risk to 

the flying public justifies waiving notice 

and comment prior to adoption of this 

rule because the main landing gear may 

fail to extend, which could result in an 

asymmetric landing configuration. 

Therefore, we determined that notice 

and opportunity for public comment 

before issuing this AD are impracticable 

and that good cause exists for making 

this amendment effective in fewer than 

30 days. 

Comments Invited 

This AD is a final rule that involves 

requirements affecting flight safety, and 

we did not precede it by notice and 

opportunity for public comment. We 

invite you to send any written relevant 

data, views, or arguments about this AD. 

Send your comments to an address 

listed under the ADDRESSES section. 

Include ‘‘Docket No. FAA–2010–1106; 

Directorate Identifier 2010–NM–237– 

AD’’ at the beginning of your comments. 

We specifically invite comments on the 

overall regulatory, economic, 

environmental, and energy aspects of 

this AD. We will consider all comments 

received by the closing date and may 

amend this AD because of 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 AD. 

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. 

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: 

2010–23–19 Bombardier, Inc.: Amendment 

39–16508. Docket No. FAA–2010–1106; 

Directorate Identifier 2010–NM–237–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective November 24, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to the Bombardier, Inc. 

airplanes identified in paragraphs (c)(1) and 

(c)(2) of this AD, certificated in any category. 

(1) Model CL–600–2C10 (Regional Jet 

Series 700, 701, & 702) airplanes, having 

serial numbers (S/Ns) 10003 and subsequent. 

(2) Model CL–600–2D15 (Regional Jet 

Series 705) and CL–600–2D24 (Regional Jet 

Series 900) airplanes, having S/Ns 15001 and 

subsequent. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 32: Landing gear. 

Reason 

(e) The mandatory continued airworthiness 

information (MCAI) states: 


wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
Federal Register / Vol. 75, No. 216 / Tuesday, November 9, 2010 / Rules and Regulations 68697 

Two cases of main landing gear (MLG) 

failure to fully extend have been reported. An 

MLG failing to extend may result in an 

unsafe asymmetric landing configuration. 

Preliminary investigation has shown that 

interference between the MLG door and the 

MLG fairing seal prevented the MLG door 

from opening. 

* * * * * 

The unsafe condition is possible loss of 

controllability of the airplane 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. 

Repetitive Inspections and Corrective 

Actions 

(g) For airplanes having S/Ns 10003 to 

10313 inclusive, 15001 to 15238 inclusive, 

and 15240 to 15255 inclusive: Within 50 

flight cycles after the effective date of this 

AD, do the inspections specified in 

paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of 

this AD, in accordance with ‘‘PART A— 

Inspection of the MLG Inboard Doors, MLG 

Fairing and Adjacent Structure’’ of the 

Accomplishment Instructions of Bombardier 

Alert Service Bulletin A670BA–32–030, 

Revision A, dated October 22, 2010. Repeat 

the inspections thereafter at intervals not to 

exceed 600 flight hours. 

(1) Do a detailed inspection for damage 

(including wear lines, cracks, fraying, tears, 

and evidence of chafing) of the rubber seal 

of the MLG fairing. 

(2) Do a detailed inspection for damage 

(including missing and broken rollers, loose 

and missing fasteners, damaged and missing 

stops) of the MLG inboard doors, and damage 

along the edge of the MLG inboard door 

adjacent to the MLG fairing. 

(3) Do a detailed inspection of the MLG 

fairing for damage (including missing 

forward and aft stops, loose and missing 

fasteners), and damage along the edge of the 

MLG fairing adjacent to the MLG door. 

(4) Do a detailed inspection for damage 

(including missing stops, loose and missing 

fasteners, and missing wedges) of the stops 

and wedge on the forward and aft spars. 

(h) For airplanes not identified in 

paragraph (g) of this AD: Within 600 flight 

hours after the effective date of this AD, do 

the inspections specified in paragraphs 

(h)(1), (h)(2), (h)(3), and (h)(4) of this AD, in 

accordance with ‘‘PART A—Inspection of the 

MLG Inboard Doors, MLG Fairing and 

Adjacent Structure’’ of the Accomplishment 

Instructions of Bombardier Alert Service 

Bulletin A670BA–32–030, Revision A, dated 

October 22, 2010. Repeat the inspections 

thereafter at intervals not to exceed 600 flight 

hours. 

(1) Do a detailed inspection for damage 

(including wear lines, cracks, fraying, tears, 

and evidence of chafing) of the rubber seal 

of the MLG fairing. 

(2) Do a detailed inspection for damage 

(including missing and broken rollers, loose 

and missing fasteners, damaged and missing 

stops) of the MLG inboard doors, and damage 

along the edge of the MLG inboard door 

adjacent to the MLG fairing. 

(3) Do a detailed inspection of the MLG 

fairing for damage (including missing 

forward and aft stops, loose and missing 

fasteners), and damage along the edge of the 

MLG fairing adjacent to the MLG door. 

(4) Do a detailed inspection for damage 

(including missing stops, loose and missing 

fasteners, and missing wedges) of the stops 

and wedge on the forward and aft spars. 

(i) If damage to only the rubber seal on the 

MLG fairing is found during any inspection 

required by paragraph (g) or (h) of this AD: 

Before further flight, do either action in 

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

(1) Replace the rubber seal on the MLG 

fairing with a new rubber seal, in accordance 

with ‘‘PART B—Replacement of the Forward 

Rubber Seal on the MLG Fairing’’ of the 

Accomplishment Instructions of Bombardier 

Alert Service Bulletin A670BA–32–030, 

Revision A, dated October 22, 2010. 

(2) Remove the MLG inboard door, in 

accordance with ‘‘PART C—Removal of MLG 

Inboard Door’’ of the Accomplishment 

Instructions of Bombardier Alert Service 

Bulletin A670BA–32–030, Revision A, dated 

October 22, 2010. For airplanes on which the 

MLG inboard door is re-installed, do the 

installation of the MLG inboard door in 

accordance with ‘‘PART D—Installation of 

MLG Inboard Door’’ of the Accomplishment 

Instructions of Bombardier Alert Service 

Bulletin A670BA–32–030, Revision A, dated 

October 22, 2010. 

(j) If damage other than the damage 

identified in paragraph (i) of this AD is found 

during any inspection required by paragraph 

(g) or (h) of this AD: Before further flight, 

contact the Bombardier Regional Aircraft 

Customer Response Center for repair 

instructions and do the repair. 

(k) Submit a report of the positive findings 

of the initial inspection required by 

paragraph (g) or (h), as applicable, of this AD 

to Bombardier, at the applicable time 

specified in paragraph (k)(1) or (k)(2) of this 

AD. The report must include the information 

specified in Appendix A of Bombardier Alert 

Service Bulletin A670BA–32–030, Revision 

A, dated October 22, 2010. 

(1) If the inspection was done on or after 

the effective date of this AD: Submit the 

report within 30 days after the inspection. 

(2) If the inspection was done before the 

effective date of this AD: Submit the report 

within 30 days after the effective date of this 

AD. 

Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(l) Actions accomplished before the 

effective date of this AD according to 

Bombardier Alert Service Bulletin A670BA– 

32–030, dated October 18, 2010, are 

considered acceptable for compliance with 

the corresponding action specified in 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 

(m) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York ACO, 

ANE–170, 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: 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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), the Office of 

Management and Budget (OMB) has 

approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(n) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–36, dated October 18, 

2010; and Bombardier Alert Service Bulletin 

A670BA–32–030, Revision A, dated October 

22, 2010; for related information. 

Material Incorporated by Reference 

(o) You must use Bombardier Alert Service 

Bulletin A670BA–32–030, Revision A, 

including Appendix A, dated October 22, 

2010, 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., 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–5000; fax 514– 

855–7401; e-mail 

thd.crj@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. 


wwoods2 on DSK1DXX6B1PROD with RULES_PART 1
68698 Federal Register / Vol. 75, No. 216 / Tuesday, November 9, 2010 / Rules and Regulations 

Issued in Renton, Washington, on 

November 1, 2010. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–28162 Filed 11–8–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0675; Directorate 

Identifier 2010–NM–061–AD; Amendment 

39–16501; AD 2010–23–12] 

RIN 2120–AA64 

Airworthiness Directives; Airbus Model 

A330–201, –202, –203, –223, –223F, 

–243, and –243F Airplanes, Model 

A330–300 Series Airplanes, and Model 

A340–200, A340–300, A340–500, and 

A340–600 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: 

* * * * * 

Investigation conducted by Thales on 

* * * probes revealed oil residue between 

the stator and the rotor parts of the AoA 

[angle of attack] vane position resolvers. This 

oil residue was due to incorrect cleaning of 

the machining oil during the manufacturing 

process of the AoA resolvers. At low 

temperatures, this oil residue becomes 

viscous (typically in cruise) causing lag of 

AoA vane movement. 

Such condition could lead to discrepant 

AoA measurement. If not corrected, and if 

two or three AoA probes were 

simultaneously affected and provided wrong 

indications of the AoA to a similar extent, it 

could lead to a late activation of the angle of 

attack protection, which in combination with 

flight at high angle of attack would constitute 

an unsafe condition. 

* * * * * 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

December 14, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of December 14, 2010. 

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: 

Vladimir Ulyanov, Aerospace Engineer, 

International Branch, ANM–116, 

Transport Airplane Directorate, FAA, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 227–1138; fax (425) 227–1149. 

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 July 7, 2010 (75 FR 38947). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states: 

During Airbus Final Assembly Line 

reception flight tests, AoA [angle of attack] 

data from two different aeroplanes were 

found inaccurate. Inaccuracy was confirmed 

by flight data analysis. 

Investigation conducted by Thales on the 

removed probes revealed oil residue between 

the stator and the rotor parts of the AoA vane 

position resolvers. This oil residue was due 

to incorrect cleaning of the machining oil 

during the manufacturing process of the AoA 

resolvers. At low temperatures, this oil 

residue becomes viscous (typically in cruise) 

causing lag of AoA vane movement. 

Such condition could lead to discrepant 

AoA measurement. If not corrected, and if 

two or three AoA probes were 

simultaneously affected and provided wrong 

indications of the AoA to a similar extent, it 

could lead to a late activation of the angle of 

attack protection, which in combination with 

flight at high angle of attack would constitute 

an unsafe condition. 

Therefore, this [European Aviation Safety 

Agency (EASA)] AD requires a one time 

inspection of the Thales Avionics AoA probe 

P/N [part number] C16291AA in order to 

identify the suspect parts and to remove 

them from service. 

This [EASA] AD revision is issued to 

specify that the identification of the affected 

AoA probes is also possible in accordance 

with aeroplane maintenance records data 

analysis. 

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. The 

commenter supports the NPRM. 

Airplane Models Certificated Since the 

NPRM Was Published 

In August 2010, after the NPRM was 

published, the FAA type-certificated 

two new Airbus models: Models A330– 

223F and –243F, and we find that those 

models are also subject to the unsafe 

condition identified this AD action. We 

have added those models to the subject 

heading on page 1 and to paragraph 

(c)(1) of this AD. Since no airplanes of 

those models are presently on the U.S. 

Register, additional notice and 

opportunity for public comment on that 

topic before issuing this AD are 

unnecessary. 

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 also 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 

about 44 products of U.S. registry. 

(There are currently no Model A340 

airplanes on the U.S. Register.) We also 

estimate that it will take about 3 workhours 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 $11,220, or $255 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. 


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