## 38004 Federal Register / Vol. 72, No. 133 / Thursday, July 12, 2007 / Rules and Regulations (g) Thereafter, at every engine shop visit, perform repetitive FPIs and borescope inspections of HP compressor stage 1 and 2 rotor discs for cracks.

(h) Use paragraphs 3.A.(1) through 3.A.(4)(o) of the Accomplishment Instructions of RR Alert Service Bulletin (ASB) No. RB.211

– 72
–AE359, Revision 1, dated November 17, 2005, to do the inspections.

(i) Accept or reject as necessary, HP compressor stage 1 and 2 rotor discs using inspection criteria paragraphs 3.A.(5)(a) through 3.A.(5)(f) of the Accomplishment Instructions of RR ASB No. RB.211

– 72
– AE359, Revision 1, dated November 17, 2005. Definition

(j) For the purpose of this AD, an engine shop visit is defined as anytime the HP compressor stage 1 and 2 rotor discs are removed from the HP compressor stage 3 disc. Reporting Requirements

(k) Within 10 days, report inspection findings of cracks to the RR local field service office representative. The Office of Management and Budget has approved the reporting requirements specified in paragraph 3.A.(6)(b) of the Accomplishment Instructions of RR ASB No. RB.211

– 72
– AE359, Revision 1, dated November 17, 2005, and assigned OMB control number 2120

– 0056. Alternative Methods of Compliance

(l) The Manager, Engine Certification Office, has the authority to approve alternative methods of compliance for this AD if requested using the procedures found in 14 CFR 39.19. Related Information

(m) United Kingdom Civil Aviation Authority airworthiness directive No. G

– 2005
– 0028 R1, dated October 18, 2005, also addresses the subject of this AD. Material Incorporated by Reference

(n) You must use Rolls-Royce plc Alert Service Bulletin No. RB.211

– 72
–AE359, Revision 1, dated November 17, 2005, to perform the inspections required by this AD. The Director of the Federal Register approved the incorporation by reference of this service bulletin in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Rolls-Royce plc, PO Box 31, Derby, England, DE248BJ; telephone: 011

– 44
– 1332
– 242424; fax: 011

– 44
– 1332
– 249936, for a copy of this service information. You may review copies at the FAA, New England Region, Office of the Regional Counsel, 12 New England Executive Park, Burlington, MA; or 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/federalregister/cfr/ibr-locations.html. Issued in Burlington, Massachusetts, on July 3, 2007. Peter A. White, Acting Manager, Engine and Propeller Directorate, Aircraft Certification Service. [FR Doc. E7

– 13410 Filed 7

– 11
– 07; 8:45 am] **BILLING CODE 4910 –**  **13 –**  **P** 

### DEPARTMENT OF TRANSPORTATION **Federal Aviation Administration 14 CFR Part 39**  **[Docket No. FAA –**  **2006 –**  **26353; Directorate Identifier 2006**  **– NM**  **– 189**  **– AD; Amendment**  **39 –**  **15124; AD 2007 –**  **14 –**  **02] RIN 2120**  **– AA64**  

### Airworthiness Directives; Bombardier **Model CL –**  **600 –**  **1A11 (CL –**  **600), CL –**  **600 –**  **2A12 (CL –**  **601), CL –**  **600 –**  **2B16 (CL –**  **601 –**  **3A, CL –**  **601 –**  **3R, and CL –**  **604) Airplanes**  **AGENCY** 

### : Federal Aviation Administration (FAA), Department of Transportation (DOT). **ACTION** 

### : Final rule. **SUMMARY** 

### : The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model CL

– 600
– 1A11 (CL

– 600), CL

– 600
– 2A12 (CL

– 601), and CL

– 600
– 2B16 (CL

– 601
– 3A, CL

– 601
– 3R, and CL

– 604) airplanes. This AD requires inspecting to identify the part number and serial number of the selector valves of the nose landing gear (NLG) and the nose gear door, and doing related investigative and corrective actions if necessary. This AD results from reports of uncommanded partial retractions of the NLG. We are issuing this AD to prevent internal leakage of the selector valve, which, under certain conditions, could result in an uncommanded retraction of the NLG with consequent damage to the airplane and possible serious injury to ground personnel. **DATES** 

### : This AD becomes effective August 16, 2007.

The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of August 16, 2007. **ADDRESSES** 

### : You may examine the AD docket on the Internet at http:// dms.dot.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.

Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, for service information identified in this AD. **FOR FURTHER INFORMATION CONTACT** 

### : Daniel Parrillo, Aerospace Engineer, Systems and Flight Test Branch, ANE

– 172, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228

– 7305; fax (516) 794

– 5531. **SUPPLEMENTARY INFORMATION** 

### : Examining the Docket

You may examine the AD docket on the Internet at http://dms.dot.gov or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone (800) 647

– 5527) is located on the ground floor of the West Building at the street address stated in the **ADDRESSES** 

### section. Discussion

The FAA issued a supplemental notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to certain Bombardier Model CL

– 600
– 1A11 (CL

– 600), CL

– 600
– 2A12 (CL

– 601), and CL

– 600
– 2B16 (CL

– 601
– 3A, CL

– 601
– 3R, and CL

– 604) airplanes. That supplemental NPRM was published in the Federal Register on April 26, 2007 (72 FR 20777). That supplemental NPRM proposed to require inspecting to identify the part number and serial number of the selector valves of the nose landing gear (NLG) and the nose gear door, and doing related investigative and corrective actions if necessary. That supplemental NPRM also proposed to add airplanes to the applicability. Comments

We provided the public the opportunity to participate in the development of this AD. No comments have been received on the supplemental NPRM or on the determination of the cost to the public. Clarification of Alternative Method of Compliance (AMOC) Paragraph

We have revised this action to clarify the appropriate procedure for notifying the principal inspector before using any approved AMOC on any airplane to which the AMOC applies. Conclusion

We have carefully reviewed the available data and determined that air safety and the public interest require adopting the AD with the change described previously. We have determined that this change will neither increase the economic burden on any

## 38005 Federal Register / Vol. 72, No. 133 / Thursday, July 12, 2007 / Rules and Regulations operator nor increase the scope of the AD. Costs of Compliance

This AD affects about 502 airplanes of U.S. registry.

The inspection to determine the manufacturer part number and serial number of the selector valve(s) takes about 1 work hour per airplane, at an average labor rate of $80 per work hour. Based on these figures, the estimated cost of the required inspection for U.S. operators is $40,160, or $80 per airplane.

The general visual inspection of the selector valve(s), if accomplished, takes about 1 work hour per airplane, at an average labor rate of $80 per work hour. Based on these figures, the estimated cost of that inspection for U.S. operators is $80 per airplane. 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 have 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 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. See the **ADDRESSES** 

### section for a location to examine the regulatory evaluation. 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 Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): 2007 – 14 – 02 Bombardier, Inc. (Formerly Canadair): Amendment 39

– 15124. Docket No. FAA

– 2006
– 26353; Directorate Identifier 2006

– NM

– 189
–AD. Effective Date

(a) This AD becomes effective August 16, 2007. Affected ADs

(b) None. Applicability

(c) This AD applies to Bombardier Model CL

– 600
– 1A11 (CL

– 600), CL

– 600
– 2A12 (CL

– 601), and CL

– 600
– 2B16 (CL

– 601
– 3A, CL

– 601
– 3R, and CL

– 604) airplanes; certificated in any category; having serial numbers (S/Ns) as identified in the service bulletins specified in Table 1 of this AD, as applicable. 

### T ABLE 

### 1.
— B OMBARDIER 

### S ERVICE 

### B ULLETINS Service bulletin Revision level Date 600
– 0721 (for Model CL
– 600
– 1A11 (CL
– 600) airplanes) .............................................................................. 01 February 20, 2006. 601
– 0558 (for Model CL
– 600
– 2A12 (CL
– 601), and CL
– 600
– 2B16 (CL
– 601
– 3A and CL
– 601
– 3R) airplanes). 01 February 20, 2006. 604
– 32
– 021 (for Model CL
– 600
– 2B16 (CL
– 604) airplanes) .......................................................................... 02 February 20, 2007.
Unsafe Condition

(d) This AD results from reports of uncommanded partial retractions of the nose landing gear (NLG). We are issuing this AD to prevent internal leakage of the selector valve, which, under certain conditions, could result in an uncommanded retraction of the NLG with consequent damage to the airplane and possible serious injury to ground personnel. Compliance

(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Inspection and Corrective Actions

(f) Within 500 flight hours or 12 months after the effective date of this AD, whichever occurs first, inspect to determine the manufacturer part numbers (P/Ns) and serial numbers of the selector valves of the NLG and nose gear door. A review of airplane maintenance records is acceptable in lieu of this inspection if the serial numbers of the selector valves can be conclusively determined from that review. For any subject selector valve having Tactair Fluid Controls P/N 750006000 and a S/N from 0001 through 0767 inclusive, before further flight, do related investigative (including a general visual inspection for proper installation of the lock wire of the end cap) and corrective actions; in accordance with the applicable service bulletin identified in Table 1 of this AD.

Note 1: Operators should be aware that selector valves having Bombardier P/N 601R75146

– 1 may be supplied by different manufacturers and have different manufacturer part numbers. Only airplanes having selector valves manufactured by Tactair Fluid Controls, having P/N 750006000, are subject to the investigative and corrective actions specified in paragraph (f) of this AD.

Note 2: For the purposes of this AD, a general visual inspection is: ‘‘ A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or

## 38006 Federal Register / Vol. 72, No. 133 / Thursday, July 12, 2007 / Rules and Regulations droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked. ’’

Note 3: The service bulletins identified in Table 1 of this AD refer to Tactair Fluid Controls Service Bulletin SB750006000

– 1, Revision A, dated September 6, 2005, as an additional source of service information for doing the related investigative and corrective actions required by this AD. Actions Accomplished According to Previous Issue of Service Bulletin

(g) Actions accomplished before the effective date of this AD in accordance with Bombardier Service Bulletin 604

– 32
– 021, Revision 01, dated February 20, 2006 (for Model CL

– 600
– 2B16 (CL

– 604) airplanes), are considered acceptable for compliance with the corresponding actions specified in this AD. Alternative Methods of Compliance (AMOCs)

(h)(1) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19.

(2) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Related Information

(i) Canadian airworthiness directive CF

– 2006
– 16, dated July 6, 2006, also addresses the subject of this AD. Material Incorporated by Reference (j) You must use the applicable service bulletins identified in Table 2 of this AD to perform the actions that are required by this AD, unless the AD specifies otherwise. The Director of the Federal Register approved the incorporation by reference of these documents in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Contact Bombardier, Inc., Canadair, Aerospace Group, P.O. Box 6087, Station Centre-ville, Montreal, Quebec H3C 3G9, Canada, for a copy of this service information. You may review copies at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington; or 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. 

### T ABLE 

### 2.
— M ATERIAL 

### I NCORPORATED BY 

### R EFERENCE Bombardier Service Bulletin Revision level Date 600
– 0721 ........................................................................................................................... .............................. 01 February 20, 2006. 601
– 0558 ........................................................................................................................... .............................. 01 February 20, 2006. 604
– 32
– 021 ............................................................................................................................ ......................... 02 February 20, 2007.

Issued in Renton, Washington, on June 25, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7

– 13081 Filed 7

– 11
– 07; 8:45 am] **BILLING CODE 4910 –**  **13 –**  **P** 

### DEPARTMENT OF TRANSPORTATION **Federal Aviation Administration 14 CFR Part 39**  **[Docket No. FAA –**  **2007 –**  **27768; Directorate Identifier 2006**  **– NM**  **– 174**  **– AD; Amendment**  **39 –**  **15123; AD 2007 –**  **14 –**  **01] RIN 2120**  **– AA64**  

### Airworthiness Directives; Airbus Model **A330 and A340 Airplanes AGENCY**  

### : Federal Aviation Administration (FAA), Department of Transportation (DOT). **ACTION** 

### : Final rule. **SUMMARY** 

### : The FAA is adopting a new airworthiness directive (AD) for all Airbus Model A330 and A340 airplanes. This AD requires revising the Airworthiness Limitations Section of the Instructions for Continued Airworthiness to incorporate new limitations for fuel tank systems. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors caused by latent failures, alterations, repairs, or maintenance actions, could result in fuel tank explosions and consequent loss of the airplane. **DATES** 

### : This AD becomes effective August 16, 2007. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the AD as of August 16, 2007. **ADDRESSES** 

### : You may examine the AD docket on the Internet at http:// dms.dot.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.

Contact Airbus, 1 Rond Point Maurice Bellonte, 31707 Blagnac Cedex, France, for service information identified in this AD. **FOR FURTHER INFORMATION CONTACT** 

### : Tim Backman, Aerospace Engineer, International Branch, ANM

– 116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98057
– 3356; telephone (425) 227

– 2797; fax (425) 227

– 1149. **SUPPLEMENTARY INFORMATION** 

### : Examining the Docket

You may examine the airworthiness directive (AD) docket on the Internet at http://dms.dot.gov or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone (800) 647

– 5527) is located on the ground floor of the West Building at the street address stated in the **ADDRESSES** 

### section. Discussion

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to all Airbus Model A330 and A340 airplanes. That NPRM was published in the Federal Register on April 5, 2007 (72 FR 16741). That NPRM proposed to require revising the Airworthiness Limitations section of the Instructions for Continued Airworthiness to incorporate new limitations for fuel tank systems. Comments

We provided the public the opportunity to participate in the development of this AD. We received no comments on the NPRM or on the determination of the cost to the public. Changes to This AD

We have removed Model A330

– 302, A330

– 303, and A340

– 643 airplanes from the applicability of this AD, since we have not yet certificated those airplane models for operation in the U.S. If these airplane models are certificated, the airworthiness