Federal Register / Vol. 75, No. 221 / Wednesday, November 17, 2010 / Rules and Regulations 70109 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0223; Directorate 

Identifier 2009–NM–105–AD; Amendment 

39–16503; AD 2010–23–14] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model CL–600–2B19 (Regional Jet 

Series 100 & 440), CL–600–2C10 

(Regional Jet Series 700, 701 & 702), 

CL–600–2D15 (Regional Jet Series 

705), and CL–600–2D24 (Regional Jet 

Series 900) 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 cases of corrosion in lower 

structural members of the passenger door 

have been reported. It was subsequently 

determined that a drainage ramp (constructed 

from resin) had deteriorated with time and 

was retaining moisture. * * * Corrosion left 

undetected could eventually affect the 

structural integrity of the door and 

surrounding structure. 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

December 22, 2010. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of December 22, 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: 

Craig Yates, 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– 

7355; 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 March 15, 2010 (75 FR 

12152). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Several cases of corrosion in lower 

structural members of the passenger door 

have been reported. It was subsequently 

determined that a drainage ramp (constructed 

from resin) had deteriorated with time and 

was retaining moisture. The ramp, therefore, 

requires removal, both to prevent further 

corrosion and to allow full access to the door 

structure during future scheduled 

inspections. Corrosion left undetected could 

eventually affect the structural integrity of 

the door and surrounding structure. 

The required actions include a general 

visual inspection for corrosion and 

damage of the lower inner section of the 

door, repair if necessary, and 

application of corrosion inhibitor 

compound. You may obtain further 

information by examining the MCAI in 

the AD docket. 

Since the NPRM was issued, we 

received Bombardier Modification 

Summary Packages IS601R52110030, 

Revision B, dated May 28, 2010; and 

IS67052110074, Revision D, dated June 

2, 2010. The revised modification 

summaries provide instructions for 

optional access to ease removal of the 

drainage ramp, which includes an 

option to install the appropriate-sized 

rivets. Those revised modification 

summaries have been referenced in this 

AD. We have revised Table 2 of this AD 

to give credit for doing the actions 

before the effective date of this AD in 

accordance with Bombardier 

Modification Summary Package 

IS601R52110030, Revision A1, dated 

April 24, 2009; and Bombardier 

Modification Summary Package 

IS67052110074, Revision A1, dated 

April 24, 2009. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comments received. 

Request To Include Provisions for 

Oversized Rivets and Repairs for Inner 

Skin When Required 

American Eagle Airlines requested 

that the proposed AD include an option 

to install oversized rivets and/or repair 

the inner skin when required. American 

Eagle Airlines stated that if certain 

rivets must be installed per specific 

drawings, and the next nominal fastener 

is required, alternative method of 

compliances (AMOC) must be obtained, 

which will increase the number of 

AMOCs and decrease efficiency when 

accomplishing this modification. 

We agree with the commenter’s 

request. As stated previously, we have 

revised this AD to refer to Bombardier 

Modification Summary Package 

IS601R52110030, Revision B, dated May 

28, 2010; and Bombardier Modification 

Summary Package IS67052110074, 

Revision D, dated June 2, 2010. These 

modification summaries were issued to 

ensure that the appropriate information 

concerning the option requested by the 

commenter is addressed. 

Request That Cost of Compliance Be 

Amended To Reflect True Cost of Labor 

Air Wisconsin Airlines requested that 

the cost of compliance be amended to 

more truly reflect the amount of labor 

and costs to the airlines. Air Wisconsin 

Airlines stated that this modification 

has been accomplished on 20 airplanes 

and the modifications have taken 

between 100 and 140 work-hours to 

accomplish. 

We agree that the cost of compliance 

should be changed to reflect the actual 

cost of the modification. We have 

considered the data presented by the 

commenter and the manufacturer, and 

agree that the number of work hours 

required is higher than our previous 

estimate. The cost analysis in AD 

rulemaking actions, typically does not 

include incidental costs such as the 

time required to gain access and close 

up, time necessary for planning, or time 

necessitated by other administrative 

actions. Those incidental costs, which 

might vary significantly among 

operators, are almost impossible to 

calculate. The manufacturer states that 

the average work-hours required for 

each airplane for the modification is 80. 

We have revised the work-hour estimate 

to 80. The costs have been changed 

accordingly. 

Request To Remove Certain Wording 

From Paragraph (g)(3) of the NPRM 

Mesaba Airlines requested that the 

wording ‘‘Remove the lower passenger 

door ramp’’ be removed from paragraph 

(g)(3) of the NPRM. Mesaba Airlines 

stated that paragraph (g)(1) of the NPRM 

requires removing the lower passenger 

door ramp, and stating it again in 

paragraph (g)(3) may cause confusion. 

We agree that the wording in question 

should be removed from paragraph 

(g)(3) of this AD. Since the door ramp 

is already removed when accomplishing 

the tasks in paragraph (g)(3) of this AD, 

it is unnecessary to repeat the phrase. 

Paragraph (g)(3) of this AD has been 

revised accordingly. 


erowe on DSK5CLS3C1PROD with RULES
70110 Federal Register / Vol. 75, No. 221 / Wednesday, November 17, 2010 / Rules and Regulations 

Clarification of Wording in Paragraph 

(g)(3) of This AD 

For clarity, we have removed the 

sentence ‘‘Applying corrosion inhibiter 

compound is a terminating action for 

the requirements of this AD’’ from 

paragraph (g)(3) of this AD. As specified 

in paragraph (g) of this AD, the actions 

in all of the subparagraphs of paragraph 

(g) of this AD (i.e., paragraphs (g)(1), 

(g)(2), and (g)(3)) must be done. 

Conclusion 

We reviewed the available data, 

including the comments 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 

1,072 products of U.S. registry. We also 

estimate that it will take 80 work-hours 

per product to comply with the basic 

requirements of this AD. The average 

labor rate is $85 per work-hour. 

Required parts will cost about $0 per 

product. Where the service information 

lists required parts costs that are 

covered under warranty, we have 

assumed that there will be no charge for 

these parts. As we do not control 

warranty coverage for affected parties, 

some parties may incur costs higher 

than estimated here. Based on these 

figures, we estimate the cost of this AD 

to the U.S. operators to be $7,289,600, 

or $6,800 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, 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: 

2010–23–14 Bombardier, Inc: Amendment 

39–16503. Docket No. FAA–2010–0223; 

Directorate Identifier 2009–NM–105–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective December 22, 2010. 

Affected ADs 

(b) None. 

Applicability 

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

airplanes identified in paragraphs (c)(1), 

(c)(2), and (c)(3) of this AD, certificated in 

any category. 

(1) Model CL–600–2B19 (Regional Jet 

Series 100 & 440) airplanes, serial numbers 

7003 through 8089 inclusive; 

(2) Model CL–600–2C10 (Regional Jet 

Series 700, 701 & 702) airplanes, serial 

numbers 10003 through 10265 inclusive; and 

(3) Model CL–600–2D15 (Regional Jet 

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

Series 900) airplanes, serial numbers 15001 

through 15173 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 52: Doors. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Several cases of corrosion in lower 

structural members of the passenger door 

have been reported. It was subsequently 

determined that a drainage ramp (constructed 

from resin) had deteriorated with time and 

was retaining moisture. The ramp, therefore, 

requires removal, both to prevent further 

corrosion and to allow full access to the door 

structure during future scheduled 

inspections. Corrosion left undetected could 

eventually affect the structural integrity of 

the door and surrounding structure. 

The required actions include a general visual 

inspection for corrosion and damage of the 

lower inner section of the door, repair if 

necessary, and application of corrosion 

inhibitor compound. 

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) Before the accumulation of 15,000 total 

flight hours, or within 5,000 flight hours after 

the effective date of this AD, whichever 

occurs later, do the actions specified in 

paragraphs (g)(1), (g)(2), and (g)(3) of this AD. 

(1) Remove the lower passenger door ramp, 

in accordance with the applicable 


erowe on DSK5CLS3C1PROD with RULES
Federal Register / Vol. 75, No. 221 / Wednesday, November 17, 2010 / Rules and Regulations 70111 

Bombardier modification summary package 

specified in Table 1 of this AD. 

(2) Do a general visual inspection for any 

damage and corrosion behind the drainage 

ramp in the lower portion of the passenger 

door. If any damage or corrosion is found, 

before further flight repair in accordance 

with a method approved by the Manager, 

New York Aircraft Certification Office, FAA; 

or Transport Canada Civil Aviation (TCCA) 

(or its delegated agent). 

(3) Apply corrosion inhibitor compound, 

in accordance with the applicable 

Bombardier modification summary package 

specified in Table 1 of this AD. 

TABLE 1—SERVICE INFORMATION

Applicable airplanes Bombardier service information Revision Date 

Model CL–600–2B19 airplanes ....... Bombardier Modification Summary Package 

IS601R52110030.

B .................................. May 28, 2010. 

Model CL–600–2C10, CL–600– 

2D15, and CL–600–2D24 airplanes.

Bombardier Modification Summary Package 

IS67052110074.

D .................................. June 2, 2010. 

(4) Inspections and modifications 

accomplished before the effective date of this 

AD according to the applicable Bombardier 

modification summary package listed in 

Table 2 of this AD, are considered acceptable 

for compliance with the corresponding 

inspection or modification specified in this 

AD. 

TABLE 2—CREDIT SERVICE INFORMATION

Applicable airplanes Bombardier service information Revision Date 

Model CL–600–2B19 airplanes ....... Bombardier Modification Summary Package 

IS601R52110030.

A .................................. July 5, 2006. 

Model CL–600–2B19 airplanes ....... Bombardier Modification Summary Package 

IS601R52110030.

A1 ................................ April 24, 2009. 

Model CL–600–2C10, CL–600– 

2D15, and CL–600–2D24 airplanes.

Bombardier Modification Summary Package 

IS67052110074.

A .................................. July 5, 2006. 

Model CL–600–2C10, CL–600– 

2D15, and CL–600–2D24 airplanes.

Bombardier Modification Summary Package 

IS67052110074.

A1 ................................ April 24, 2009. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: The 

MCAI does not require an inspection or 

application of a corrosion inhibitor 

compound. This AD requires both actions. 

Other FAA AD Provisions 

(h) 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. 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 

(i) Refer to MCAI Canadian Airworthiness 

Directive CF–2009–23, dated May 19, 2009, 

and the Bombardier modification summary 

packages listed in Table 1 of this AD, for 

related information. 

Material Incorporated by Reference 

(j) You must use Bombardier Modification 

Summary Package IS601R52110030, Revision 

B, dated May 28, 2010; and Bombardier 

Modification Summary Package 

IS67052110074, Revision D, dated June 2, 

2010; as applicable; to do the actions 

required by this AD, unless the AD specifies 

otherwise. (The revision date of these 

modification summary packages is located 

only on sheet 2 of the documents; no other 

page of the documents contains this 

information.) 

(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 Coˆte 

Vertu 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. 

Issued in Renton, Washington, on October 

23, 2010. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–28175 Filed 11–16–10; 8:45 am] 

BILLING CODE 4910–13–P 


erowe on DSK5CLS3C1PROD with RULES