Federal Register / Vol. 72, No. 16 / Thursday, January 25, 2007 / Rules and Regulations 3359 

(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): 

2007–01–09 Boeing: Amendment 39–14881. 

Docket No. FAA–2006–25518; 

Directorate Identifier 2006–NM–092–AD. 

Effective Date 

(a) This AD becomes effective March 1, 

2007. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Boeing Model 747–

100B SUD, 747–200B, 747–300, 747–400, 

747–400D, and 747SP series airplanes, 

certificated in any category; as identified in 

Boeing Alert Service Bulletin 747–53A2591, 

dated April 6, 2006. 

Unsafe Condition 

(d) This AD results from a report indicating 

that an operator discovered crease beam 

cracking on two Model 747 airplanes. We are 

issuing this AD to detect and correct cracking 

of the crease beam and adjacent structure, 

which could become large and result in inflight depressurization and inability of the 

airframe structure to sustain flight loads. 

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. 

Repetitive Detailed Inspections and Related 

Investigative and Corrective Actions 

(f) Perform a detailed inspection for 

cracking of the crease beam and adjacent 

intercostals, stringers, frames, and skin 

panels at the applicable initial and repetitive 

compliance times specified in Table 1 of 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 747–53A2591, dated 

April 6, 2006; except, where the alert service 

bulletin specifies an initial compliance time 

after the date on the alert service bulletin, 

this AD requires compliance within the 

specified compliance time after the effective 

date of this AD. Do all applicable related 

investigative and corrective actions before 

further flight if any cracking is found. Do all 

applicable actions in accordance with the 

Accomplishment Instructions of the alert 

service bulletin, except as provided by 

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

(1) Where the alert service bulletin 

specifies to contact the manufacturer for 

instructions on how to repair certain 

conditions, before further flight, repair those 

conditions using a method approved in 

accordance with paragraph (g) of this AD. 

(2) Where the alert service bulletin 

specifies to report certain information to the 

manufacturer, this AD does not include that 

requirement. 

Alternative Methods of Compliance 

(AMOCs) 

(g)(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested in accordance with the procedures 

found in 14 CFR 39.19. 

(2) Before using any AMOC approved in 

accordance with § 39.19 on any airplane to 

which the AMOC applies, notify the 

appropriate principal inspector in the FAA 

Flight Standards Certificate Holding District 

Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair 

required by this AD, if it is approved by an 

Authorized Representative for the Boeing 

Commercial Airplanes Delegation Option 

Authorization Organization who has been 

authorized by the Manager, Seattle ACO, to 

make those findings. For a repair method to 

be approved, the repair must meet the 

certification basis of the airplane, and the 

approval must specifically refer to this AD. 

Material Incorporated by Reference 

(h) You must use Boeing Alert Service 

Bulletin 747–53A2591, dated April 6, 2006, 

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 this 

document in accordance with 5 U.S.C. 552(a) 

and 1 CFR part 51. Contact Boeing 

Commercial Airplanes, P.O. Box 3707, 

Seattle, Washington 98124–2207, for a copy 

of this service information. You may review 

copies at the Docket Management Facility, 

U.S. Department of Transportation, 400 

Seventh Street, SW., Room PL–401, Nassif 

Building, Washington, DC; on the Internet at 

http://dms.dot.gov; or at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at the 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 

December 26, 2006. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E7–910 Filed 1–24–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2006–24691; Directorate 

Identifier 2006–NM–051–AD; Amendment 

39–14901; AD 2007–02–14] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–600, –700, –700C, –800, and 

–900 Series 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 

Boeing Model 737–600, –700, –700C, 

–800, and –900 series airplanes. This 

AD requires testing the electrical 

resistance of the bond between the 

bulkhead fitting for the fuel feed line 

and the front spar of the left and right 

wings, inspecting an adjacent bonding 

jumper to make sure it is installed 

correctly, and performing corrective and 

other specified actions as applicable. 

This AD results from fuel system 

reviews conducted by the manufacturer. 

We are issuing this AD to prevent arcing 

or sparking in the fuel tank in the event 

of a lightning strike, which could result 

in an uncontrolled fire or explosion. 

DATES: This AD becomes effective 

March 1, 2007. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of March 1, 2007. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

dms.dot.gov or in person at the Docket 

Management Facility, U.S. Department 

of Transportation, 400 Seventh Street, 

SW., Nassif Building, Room PL–401, 

Washington, DC. 

Contact Boeing Commercial 

Airplanes, P.O. Box 3707, Seattle, 

Washington 98124–2207, for the service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: 

Doug Pegors, Aerospace Engineer, 


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3360 Federal Register / Vol. 72, No. 16 / Thursday, January 25, 2007 / Rules and Regulations 

Propulsion Branch, ANM–140S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6504; fax (425) 917–6590. 

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 Management Facility office 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

The Docket Management Facility office 

(telephone (800) 647–5227) is located on 

the plaza level of the Nassif 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 certain Boeing Model 737–600, 

–700, –700C, –800, and –900 series 

airplanes. That NPRM was published in 

the Federal Register on May 5, 2006 (71 

FR 26423). That NPRM proposed to 

require testing the electrical resistance 

of the bond between the bulkhead fitting 

for the fuel feed line and the front spar 

of the left and right wings, inspecting an 

adjacent bonding jumper to make sure it 

is installed correctly, and performing 

corrective and other specified actions as 

applicable. 

Comments 

We provided the public the 

opportunity to participate in the 

development of this AD. We have 

considered the comments received. 

Request To Cite Revised Service 

Information 

AirTran Airways (AirTran) supports 

the NPRM. AirTran asks that if the 

NPRM is changed to refer to Revision 1 

of Boeing Special Attention Service 

Bulletin 737–28–1225 (which was being 

drafted when the comment was 

submitted), credit be given for 

accomplishing the inspection and 

modification in accordance with the 

original issue of the service bulletin. 

The NPRM referred to Boeing Special 

Attention Service Bulletin 737–28–

1225, dated January 12, 2006, as the 

source of service information for 

accomplishing the specified actions. 

Boeing asks that paragraphs (c) and (f) 

of the NPRM be changed to reference 

Boeing Special Attention Service 

Bulletin 737–28–1225, Revision 1, dated 

October 30, 2006. Boeing notes that 

Revision 1 corrects the illustrations that 

show the routing of the bonding 

jumpers, as well as the illustration 

views that show the locations of the 

electrical bond resistance equipment 

probes. (At the time this comment was 

submitted, Revision 1 was not yet 

issued.) Boeing adds that its request is 

to eliminate the need for an alternative 

method of compliance (AMOC) request. 

Boeing also states that credit should be 

given for accomplishing the actions in 

accordance with the original issue. 

We agree with these requests. We 

have reviewed Revision 1 of the 

referenced service bulletin, which 

specifies that no more work is necessary 

on airplanes changed as shown in the 

original issue of the service bulletin; the 

changes in Revision 1 are mainly 

editorial. Therefore, we have changed 

paragraph (f) of the AD to add Boeing 

Special Attention Service Bulletin 737–

28–1225, Revision 1, dated October 30, 

2006, as the source of service 

information for accomplishing the 

requirements in that paragraph, and we 

have added a new paragraph (g) to the 

AD to give credit for the actions done 

before the effective date of this AD in 

accordance with Boeing Special 

Attention Service Bulletin 737–28–

1225, dated January 12, 2006. We have 

also changed the applicability in 

paragraph (c) of the AD to reference 

Revision 1. 

Request To Correct Certain Grammar 

Boeing also asks that we correct the 

grammar specified in paragraph (f) of 

the NPRM by deleting the language ‘‘by 

doing all of the actions specified.’’ We 

agree and have changed the specified 

language. 

Conclusion 

We have carefully 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 have determined that 

these changes will neither increase the 

economic burden on any operator nor 

increase the scope of the AD. 

Costs of Compliance 

There are about 1,541 airplanes of the 

affected design in the worldwide fleet. 

This AD affects about 591 airplanes of 

U.S. registry. The required actions take 

about 4 work hours per airplane, at an 

average labor rate of $80 per work hour. 

Based on these figures, the estimated 

cost of the AD for U.S. operators is 

$189,120, or $320 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 


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Federal Register / Vol. 72, No. 16 / Thursday, January 25, 2007 / Rules and Regulations 3361 

by adding the following new 

airworthiness directive (AD): 

2007–02–14 Boeing: Amendment 39–14901. 

Docket No. FAA–2006–24691; 

Directorate Identifier 2006–NM–051–AD. 

Effective Date 

(a) This AD becomes effective March 1, 

2007. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Boeing Model 737–

600, –700, –700C, –800, and –900 series 

airplanes, certificated in any category; as 

identified in Boeing Special Attention 

Service Bulletin 737–28–1225, Revision 1, 

dated October 30, 2006. 

Unsafe Condition 

(d) This AD results from fuel system 

reviews conducted by the manufacturer. We 

are issuing this AD to prevent arcing or 

sparking in the fuel tank in the event of a 

lightning strike, which could result in an 

uncontrolled fire or explosion. 

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. 

Test, Inspection, and Corrective and Other 

Specified Actions 

(f) Within 60 months after the effective 

date of this AD, test the electrical resistance 

of the bond between the bulkhead fitting for 

the fuel feed line and the wing front spar on 

the left and right wings, do a general visual 

inspection of adjacent bonding jumpers to 

make sure they are installed correctly, and do 

all applicable corrective and other specified 

actions. Do all the actions in accordance with 

the Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 737–28–

1225, Revision 1, dated October 30, 2006. All 

applicable corrective actions and other 

specified actions must be done before further 

flight after the electrical resistance test. 

Credit for Actions Accomplished Previously 

(g) Actions done before the effective date 

of this AD in accordance with Boeing Special 

Attention Service Bulletin 737–28–1225, 

dated January 12, 2006; are considered 

acceptable for compliance with the actions 

required by paragraph (f) of this AD. 

Alternative Methods of Compliance 

(AMOCs) 

(h)(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested in accordance with the procedures 

found in 14 CFR 39.19. 

(2) Before using any AMOC approved in 

accordance with § 39.19 on any airplane to 

which the AMOC applies, notify the 

appropriate principal inspector in the FAA 

Flight Standards Certificate Holding District 

Office. 

Material Incorporated by Reference 

(i) You must use Boeing Special Attention 

Service Bulletin 737–28–1225, Revision 1, 

dated October 30, 2006, 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 this document 

in accordance with 5 U.S.C. 552(a) and 1 CFR 

part 51. Contact Boeing Commercial 

Airplanes, P.O. Box 3707, Seattle, 

Washington 98124–2207, for a copy of this 

service information. You may review copies 

at the Docket Management Facility, U.S. 

Department of Transportation, 400 Seventh 

Street, SW., Room PL–401, Nassif Building, 

Washington, DC; on the Internet at http:// 

dms.dot.gov; or at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at the 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 January 

11, 2007. 

Kevin M. Mullin, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E7–898 Filed 1–24–07; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2006–25271; Directorate 

Identifier 2006–NM–067–AD; Amendment 

39–14903; AD 2007–02–16] 

RIN 2120–AA64 

Airworthiness Directives; Saab Model 

SAAB-Fairchild SF340A (SAAB/ 

SF340A) and SAAB 340B Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is superseding an 

existing airworthiness directive (AD), 

which applies to certain Saab Model 

SAAB-Fairchild SF340A and SAAB 

340B airplanes. That AD currently 

requires repetitive inspections for wear 

of the brushes and leads and for loose 

rivets of the direct current (DC) starter 

generator, and related investigative/ 

corrective actions if necessary. This new 

AD requires installing new, improved 

generator control units (GCUs). 

Installing the GCUs ends the repetitive 

inspection requirements of the existing 

AD. This AD results from reports of 

premature failures of the DC starter 

generator prior to scheduled overhaul. 

We are issuing this AD to prevent 

failure of the starter generator, which 

could cause a low voltage situation in 

flight and result in increased pilot 

workload and reduced redundancy of 

the electrical powered systems. 

DATES: This AD becomes effective 

March 1, 2007. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of March 1, 2007. 

On April 1, 2005 (70 FR 9215, 

February 25, 2005), the Director of the 

Federal Register approved the 

incorporation by reference of Saab 

Service Bulletin 340–24–035, dated July 

5, 2004, including Attachment 1 

(Goodrich Service Information Letter 

23080–03X–24–01), dated July 1, 2004. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

dms.dot.gov or in person at the Docket 

Management Facility, U.S. Department 

of Transportation, 400 Seventh Street, 

SW., Nassif Building, Room PL–401, 

Washington, DC. 

Contact Saab Aircraft AB, SAAB 

Aircraft Product Support, S–581.88, 

Linko ̈ping, Sweden, for service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: 

Mike Borfitz, Aerospace Engineer, 

International Branch, ANM–116, FAA, 

Transport Airplane Directorate, 1601 

Lind Avenue, SW., Renton, Washington 

98057–3356; telephone (425) 227–2677; 

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 Management Facility office 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

The Docket Management Facility office 

(telephone (800) 647–5227) is located on 

the plaza level of the Nassif 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 

supersedes AD 2005–04–12, amendment 

39–13984 (70 FR 9215, February 25, 

2005). The existing AD applies to 

certain Saab Model SAAB-Fairchild 

SF340A and SAAB 340B airplanes. That 

NPRM was published in the Federal 

Register on July 6, 2006 (71 FR 38311). 

That NPRM proposed to continue to 

require repetitive inspections for wear 

of the brushes and leads and for loose 

rivets of the direct current (DC) starter 

generator, and related investigative/ 


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