Federal Register / Vol. 76, No. 123 / Monday, June 27, 2011 / Rules and Regulations 37255 

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. 

Related Information 

(k) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–28, dated August 20, 

2010; and Bombardier Service Bulletin 84– 

27–52, dated May 25, 2010; for related 

information. 

Material Incorporated by Reference 

(l) You must use Bombardier Service 

Bulletin 84–27–52, dated May 25, 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., 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 June 14, 

2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–15367 Filed 6–24–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–1212; Directorate 

Identifier 2008–NM–167–AD; Amendment 

39–16732; AD 2011–13–09] 

RIN 2120–AA64 

Airworthiness Directives; Airbus Model 

A330–200 and –300 Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) 

that applies to 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: 

* * * * * 

The airworthiness limitations applicable to 

the Certification Maintenance Requirements 

(CMR) are given in Airbus A330 ALS Part 3, 

which is approved by the European Aviation 

Safety Agency (EASA). 

The revision 03 of Airbus A330 ALS Part 

3 introduces more restrictive maintenance 

requirements and/or airworthiness 

limitations. Failure to comply with this 

revision constitutes an unsafe condition. 

* * * * * 

The unsafe condition is safetysignificant latent failures that would, in 

combination with one or more other 

specific failures or events, result in a 

hazardous or catastrophic failure 

condition. We are issuing this AD to 

require actions to correct the unsafe 

condition on these products. 

DATES: This AD becomes effective 

August 1, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of August 1, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain other publication listed in 

this AD as of April 9, 2007 (72 FR 9658, 

March 5, 2007). 

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 second supplemental 

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 February 7, 

2011 (76 FR 6578), and proposed to 

supersede AD 2007–05–08, Amendment 

39–14969 (72 FR 9658, March 5, 2007). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states: 

The airworthiness limitations are currently 

distributed in the Airbus A330 Airworthiness 

Limitations Section (ALS). 

The airworthiness limitations applicable to 

the Certification Maintenance Requirements 

(CMR) are given in Airbus A330 ALS Part 3, 

which is approved by the European Aviation 

Safety Agency (EASA). 

The revision 03 of Airbus A330 ALS Part 

3 introduces more restrictive maintenance 

requirements and/or airworthiness 

limitations. Failure to comply with this 

revision constitutes an unsafe condition. 

For the reason described above, this new 

AD supersedes EASA AD 2010–0048 and 

requires the implementation of the new or 

more restrictive maintenance requirements 

and/or airworthiness limitations as specified 

in Airbus A330 ALS Part 3 revision 03. 

The unsafe condition is safetysignificant latent failures that would, in 

combination with one or more other 

specific failures or events, result in a 

hazardous or catastrophic failure 

condition. 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 comments received. 

Request To Delete Requirement of No 

Alternative Inspection Interval 

Hawaiian Airlines (Hawaiian) 

requested that paragraph (j) of the 

second supplemental NPRM be removed 

completely, or amended to delete the 

requirement regarding the inspection 

interval. Hawaiian explained that 

paragraph (j) of the second 

supplemental NPRM would mandate 

that no alternative inspections or 

inspection intervals could be used 

unless approved as an alternative 

method of compliance (AMOC). 

Hawaiian argued that this proposed 

requirement would restrict operators 

from using the long standing approved 


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ALS Part 3 policy for exceptional shortterm extensions, as defined in ‘‘Ref (C) 

ALS paragraph 9.’’ Hawaiian reasoned 

that the proposed requirement would 

also restrict operators from adjusting the 

interval on two-star certification 

maintenance requirements (CMR**) in 

accordance with the operators approved 

escalation practices or approved 

reliability program, as allowed per ‘‘Ref 

(C) paragraph 6.B.’’ 

We partially agree. While we do not 

agree to remove paragraph (j) or delete 

the inspection interval in paragraph (j) 

of this final rule, we agree to add the 

phrase, ‘‘other than those specified in 

Airbus A330 ALS, Part 3—Certification 

Maintenance Requirements, Revision 

03, dated July 29, 2010,’’ which allows 

operators to use alternative inspections 

and alternative inspection intervals 

within the guidelines of Airbus A330 

ALS, Part 3—Certification Maintenance 

Requirements, Revision 03, dated July 

29, 2010. We have also revised 

paragraph (g) of this AD by replacing the 

phrase ‘‘at the times’’ with the phrase 

‘‘within the times’’ to clarify all 

compliance times and extensions 

specified in Airbus A330 ALS, Part 3— 

Certification Maintenance 

Requirements, Revision 03, dated July 

29, 2010, are acceptable. 

Request for Inclusion of Appropriate 

AD 

Airbus requested that we revise the 

second supplemental NPRM to 

reference the European Aviation Safety 

Agency (EASA) AD 2006–0224, dated 

July 27, 2006, instead of EASA AD 

2006–0225, dated July 21, 2006. Airbus 

explained that EASA AD 2006–0225, 

dated July 21, 2006, is listed in the 

Related Information paragraph 

(paragraph (l)) of the second 

supplemental NPRM. 

We agree to revise this final rule to 

reference EASA AD 2006–0224, dated 

July 27, 2006, in paragraph (l) of this 

AD. We have determined that EASA AD 

2006–0224, dated July 27, 2006, is the 

appropriate corresponding EASA AD for 

this final rule. 

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 

about 55 products of U.S. registry. 

The actions that are required by AD 

2007–05–08 and retained in this AD 

take about 1 work-hour per product, at 

an average labor rate of $85 per workhour. Based on these figures, the 

estimated cost of the currently required 

actions is $85 per product. 

We estimate that it will take about 1 

work-hour per product to comply with 

the new basic requirements of this AD. 

The average labor rate is $85 per workhour. Based on these figures, we 

estimate the cost of this AD to the U.S. 

operators to be $4,675, 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 

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 

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 proposed 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 

removing Amendment 39–14969 (72 FR 

9658, March 5, 2007) and adding the 

following new AD: 

2011–13–09 Airbus: Amendment 39–16732. 

Docket No. FAA–2009–1212; Directorate 

Identifier 2008–NM–167–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective August 1, 2011. 

Affected ADs 

(b) This AD supersedes AD 2007–05–08, 

Amendment 39–14969. 


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Federal Register / Vol. 76, No. 123 / Monday, June 27, 2011 / Rules and Regulations 37257 

Applicability 

(c) This AD applies to all Airbus Model 

A330–201, –202, –203, –223, –223F, –243, 

–243F, –301, –302, –303, –321, –322, –323, 

–341, –342, and –343 airplanes, certificated 

in any category; all serial numbers. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 05. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

* * * * * 

The airworthiness limitations applicable to 

the Certification Maintenance Requirements 

(CMR) are given in Airbus A330 ALS Part 3, 

which is approved by the European Aviation 

Safety Agency (EASA). 

The revision 03 of Airbus A330 ALS Part 

3 introduces more restrictive maintenance 

requirements and/or airworthiness 

limitations. Failure to comply with this 

revision constitutes an unsafe condition. 

* * * * * 

The unsafe condition is safety-significant 

latent failures that would, in combination 

with one or more other specific failures or 

events, result in a hazardous or catastrophic 

failure condition. 

Note 1: This AD requires revisions to 

certain operator maintenance documents to 

include new inspections. Compliance with 

these inspections is required by 14 CFR 

91.403(c). For airplanes that have been 

previously modified, altered, or repaired in 

the areas addressed by these inspections, the 

operator may not be able to accomplish the 

inspections described in the revisions. In this 

situation, to comply with 14 CFR 91.403(c), 

the operator must request approval for an 

alternative method of compliance according 

to paragraph (k) of this AD. The request 

should include a description of changes to 

the required inspections that will ensure the 

continued damage tolerance of the affected 

structure. The FAA has provided guidance 

for this determination in Advisory Circular 

(AC) 25–1529–1A. 

Restatement of Requirements of AD 2007– 

05–08, With Requirements for Model A340 

Airplanes Removed 

Revise the Airworthiness Limitations 

Section (ALS) of the Instructions for 

Continued Airworthiness 

(f) Unless already done: Within 90 days 

after April 9, 2007 (the effective date of AD 

2007–05–08), revise the Airworthiness 

Limitations section of the Instructions for 

Continued Airworthiness by incorporating 

Airbus A330 Certification Maintenance 

Requirements, Document 955.2074/93, Issue 

19, dated March 22, 2006. Accomplish the 

actions specified in Airbus A330 

Certification Maintenance Requirements, 

Document 955.2074/93, Issue 19, dated 

March 22, 2006, at the times specified in 

Airbus A330 Certification Maintenance 

Requirements, Document 955.2074/93, Issue 

19, dated March 22, 2006, and in accordance 

with Airbus A330 Certification Maintenance 

Requirements, Document 955.2074/93, Issue 

19, dated March 22, 2006, except as provided 

by paragraphs (f)(1) and (f)(2) of this AD. 

(1) The associated interval for any new task 

is to be counted from April 9, 2007. 

(2) The associated interval for any revised 

task is to be counted from the previous 

performance of the task. 

New Requirements of This AD 

Revise the Maintenance Program 

(g) Unless already done, within 90 days of 

the effective date of this AD: Revise the 

maintenance program which ensures the 

continuing airworthiness of each operated 

airplane by incorporating Airbus A330 ALS, 

Part 3—Certification Maintenance 

Requirements, Revision 03, dated July 29, 

2010. Within the times specified in the 

Airbus A330 ALS, Part 3—Certification 

Maintenance Requirements, Revision 03, 

dated July 29, 2010, comply with all 

applicable maintenance requirements and 

associated airworthiness limitations included 

in Airbus A330 ALS, Part 3—Certification 

Maintenance Requirements, Revision 03, 

dated July 29, 2010, except as provided by 

paragraphs (h) and (i) of this AD. Doing this 

revision terminates the requirements of 

paragraph (f) of this AD for that airplane 

only. 

Exceptions to the Certification Maintenance 

Requirements (CMR) Tasks 

(h) At the latest of the times specified in 

paragraph (h)(1), (h)(2), or (h)(3) of this AD: 

Do the first accomplishment of Airbus A330 

CMR Task 213100–00001–2–C, Pressure 

Control Monitoring, of Airbus A330 ALS, 

Part 3—Certification Maintenance 

Requirements, Revision 03, dated July 29, 

2010. 

(1) Before the accumulation of 48,000 total 

flight hours. 

(2) Within 48,000 flight hours after the 

most recent accomplishment of Airbus A330 

Maintenance Review Board Report (MRBR) 

Task 21.31.00/05. 

(3) Within three months after the effective 

date of this AD. 

(i) At the latest of the times specified in 

paragraph (i)(1), (i)(2), or (i)(3) of this AD: Do 

the first accomplishment of Airbus A330 

CMR Tasks 242000–00005–1–C, AC 

Generation; 243000–00001–1–C, DC 

Generation; and 243000–00002–1–C, DC 

Generation; of Airbus A330 ALS, Part 3— 

Certification Maintenance Requirements, 

Revision 03, dated July 29, 2010. 

(1) Before the accumulation of 12,000 total 

flight hours. 

(2) Within 12,000 flight hours after the 

most recent accomplishment of Airbus A330 

MRBR Task 24.20.00/17, 24.30.00/04, or 

24.30.00/05 respectively. 

(3) Within three months after the effective 

date of this AD. 

No Alternative Inspections or Intervals 

(j) After accomplishing the action required 

by paragraph (g) of this AD, no alternative 

inspections or inspection intervals may be 

used, other than those specified in Airbus 

A330 ALS, Part 3—Certification Maintenance 

Requirements, Revision 03, dated July 29, 

2010, unless the inspections or intervals are 

approved as an alternative method of 

compliance (AMOC) in accordance with the 

procedures specified in paragraph (k)(1) 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 

(k) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, ANM–116, 

International Branch, Transport Airplane 

Directorate, 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: 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. 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 FAAapproved 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 

(l) Refer to European Aviation Safety 

Agency (EASA) Airworthiness Directives 

2006–0224, dated July 27, 2006, and 2010– 

0264, dated December 20, 2010; Airbus A330 

Certification Maintenance Requirements, 

Document 955.2074/93, Issue 19, dated 

March 22, 2006; and Airbus A330 ALS, Part 

3—Certification Maintenance Requirements, 

Revision 03, dated July 29, 2010; for related 

information. 

Material Incorporated by Reference 

(m) You must use Airbus A330 

Certification Maintenance Requirements, 

Document 955.2074/93, Issue 19, dated 

March 22, 2006; and Airbus A330 ALS, Part 

3—Certification Maintenance Requirements, 

Revision 03, dated July 29, 2010; as 

applicable; to do the actions required by this 

AD, unless the AD specifies otherwise. The 

revision level of Airbus A330 ALS, Part 3— 

Certification Maintenance Requirements, 

Revision 03, dated July 29, 2010, is identified 

only on the title page of the document; the 

revision date of this document is not 

identified on the title page. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

Airbus A330 ALS, Part 3—Certification 

Maintenance Requirements, Revision 03, 

dated July 29, 2010, under 5 U.S.C. 552(a) 

and 1 CFR part 51. 

(2) The Director of the Federal Register 

previously approved the incorporation by 

reference of Airbus A330 Certification 


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Maintenance Requirements, Document 

955.2074/93, Issue 19, dated March 22, 2006; 

on April 9, 2007 (72 FR 9658, March 5, 2007). 

(3) For service information identified in 

this AD, contact Airbus SAS—Airworthiness 

Office—EAL, 1 Rond Point Maurice Bellonte, 

31707 Blagnac Cedex, France; telephone +33 

5 61 93 36 96; fax +33 5 61 93 45 80, e-mail 

airworthiness.A330-A340@airbus.com; 

Internet http://www.airbus.com. 

(4) 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. 

(5) 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 June 14, 

2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–15366 Filed 6–24–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0036; Directorate 

Identifier 2010–NM–230–AD; Amendment 

39–16729; AD 2011–13–06] 

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: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

August 1, 2011. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of August 1, 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: 

James Delisio, Aerospace Engineer, 

Propulsion and Services Branch, ANE– 

173, FAA, New York Aircraft 

Certification Office, 1600 Stewart 

Avenue, Suite 410, Westbury, New York 

11590; telephone (516) 228–7321; 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 February 7, 2011 (76 FR 

6584). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

The Bombardier modifications include: 

• Modsum 4–126330, ‘‘Fuel Tank 

System Design Left and Right Side 

(SFAR 88) Retrofit.’’ The retrofit 

includes replacing certain fittings, 

couplings, o-rings, gaskets, fuel adapter, 

and other related components with new, 

improved parts; applying Alodine 1132 

to certain areas of a wing rib and a wing 

spar; and replacing a certain doubler on 

the front wing spar with a new, 

improved doubler. 

• Modsum 4–126366, ‘‘Fuel Tank 

System and Fuel Indication—Wiring 

Identification, Segregation and 

Installation (High Level Sensor and Fuel 

Quantity Indication)—Retrofit.’’ The 

retrofit includes adding new wiring 

with protective sleeving, reworking 

existing wiring, labeling and separating 

the fuel quantity indicating (FQI) wiring 

and high level sensor wiring from other 

wiring, enhancing the electro-magnetic 

interference (EMI) shielding of the 

wiring connected to the vent valve 

position switch, and installing 

additional provisions (bulkhead 

brackets) for wiring clips in the center 

fuselage. 

• Modsum 4–901425, ‘‘Fuel Feed to 

APU—Replacement of Couplings in 

Center Wing Left Side—SFAR 88.’’ 

• Modsum 4–126370, ‘‘Fuel Tank 

System—Enhance Protective Covering 

for Electrical Cable Assembly,’’ which 

includes reworking the contact area on 

the rib at Yw–42.000 to ensure adequate 

electrical bonding, installing spiral wrap 

on certain cable assemblies where 

existing spiral wrap does not extend 4 

inches past the tie mounts, applying a 

dome seal on thread openings on a high 

level sensor, and installing fuel 

grommets at certain locations. 

• Modsum 4–113580, ‘‘Fuel 

Indication—High Level Sensor— 

Application of Sealant to Exposed End 

of Sensor Terminal Block Screws— 

Special Inspection and Rectification,’’ 

which includes doing a detailed 

inspection of the high level sensor for 

correct sealant coverage (‘dome seal’) on 

the terminal screws, and applying 

sealant 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 

received no comments on the NPRM 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. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 


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