50714 Federal Register / Vol. 73, No. 168 / Thursday, August 28, 2008 / Rules and Regulations 

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. 

(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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act, 

the Office of Management and Budget (OMB) 

has approved the information collection 

requirements and has assigned OMB Control 

Number 2120–0056. 

Related Information 

(h) Refer to MCAI Brazilian Airworthiness 

Directives 2006–11–02R3 and 2006–11–03R3, 

both effective June 13, 2008; EMBRAER 

Service Bulletins 170–22–0003 and 190–22–

0002, both Revision 01, both dated November 

5, 2007; EMBRAER Service Bulletin 170–31–

0019, Revision 01, dated June 25, 2007; and 

EMBRAER Service Bulletin 190–31–0009, 

Revision 02, dated June 29, 2007; for related 

information. 

Material Incorporated by Reference 

(i) You must use the applicable service 

information specified in Table 1 of this AD 

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 Empresa Brasileira de 

Aeronautica S.A. (EMBRAER), P.O. Box 

343—CEP 12.225, Sao Jose dos Campos—SP, 

Brazil. 

(3) 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/ibrlocations.html. 

TABLE 1—MATERIAL INCORPORATED

BY REFERENCE

EMBRAER 

Service 

Bulletin—

Revision— Dated—

170–22–

0003.

01 November 5, 2007. 

170–31–

0019.

01 June 25, 2007. 

190–22–

0002.

01 November 5, 2007. 

190–31–

0009.

02 June 29, 2007. 

Issued in Renton, Washington, on August 

6, 2008. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E8–19143 Filed 8–27–08; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0621; Directorate 

Identifier 2008–NM–015–AD; Amendment 

39–15653; AD 2008–17–15] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–600, –700, –800, and –900 

Series Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

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

–900 series airplanes. This AD requires 

installing hot short protector (HSP) 

support brackets and equipment for the 

fuel quantity indicating system (FQIS) 

fuel densitometer and other specified 

actions as applicable. This AD also 

requires revising the Airworthiness 

Limitations (AWLs) section of the 

Instructions for Continued 

Airworthiness to incorporate AWL No. 

28–AWL–07. This AD results from fuel 

system reviews conducted by the 

manufacturer. We are issuing this AD to 

prevent the center tank fuel 

densitometer from overheating and 

becoming a potential ignition source 

inside the center fuel tank, which, in 

combination with flammable fuel 

vapors, could result in a center fuel tank 

explosion and consequent loss of the 

airplane. 

DATES: This AD is effective October 2, 

2008. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 2, 2008. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, P.O. Box 3707, 

Seattle, Washington 98124–2207. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility between 9 

a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD 

docket contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (telephone 800–647–5527) 

is the Document Management Facility, 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Georgios Roussos, Aerospace Engineer, 

Systems and Equipment Branch, ANM–

130S, FAA, Seattle Aircraft Certification 

Office, 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6482; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an airworthiness 

directive (AD) that would apply to 

certain Boeing Model 737–600, –700, 

–800, and –900 series airplanes. That 

NPRM was published in the Federal 

Register on June 9, 2008 (73 FR 32491). 

That NPRM proposed to require 

installing hot short protector (HSP) 

support brackets and equipment for the 

fuel quantity indicating system (FQIS) 

fuel densitometer and other specified 

actions as applicable. That NPRM 

proposed to also require revising the 

Airworthiness Limitations (AWLs) 

section of the Instructions for Continued 

Airworthiness to incorporate AWL No. 

28–AWL–07. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the single comment 

received. Boeing concurs with the 

NPRM. 

Change to Final Rule Regarding Later 

Revisions of Service Information 

We removed all references to the use 

of ‘‘later revisions’’ of the applicable 

service information from this AD to be 

consistent with FAA and Office of the 

Federal Register policies. We may 

consider approving the use of later 

revisions of the service information as 

an alternative method of compliance 

with this AD, as provided by paragraph 

(k) of this AD. 

Conclusion 

We reviewed the relevant data, 

considered the comment received, and 

determined that air safety and the 

public interest require adopting the AD 

with the change described previously. 

We also determined that this change 

will not increase the economic burden 

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Federal Register / Vol. 73, No. 168 / Thursday, August 28, 2008 / Rules and Regulations 50715 

on any operator or increase the scope of 

the AD. 

Costs of Compliance 

We estimate that this AD affects 13 

airplanes of U.S. registry. The following 

table provides the estimated costs, at an 

average labor rate of $80 per work hour, 

for U.S. operators to comply with this 

AD. 

ESTIMATED COSTS

Action Work hours Parts Cost per airplane 

Number of 

U.S.-registered airplanes 

Fleet cost 

Installation of HSP support 

brackets and equipment.

Up to 16 ...... Up to $14,698 ................... Up to $15,978 ................... 13 Up to $207,714 

AWLs revision ................... 1 .................. None ................................. $80 .................................... 13 $1,040 

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. 

You can find our regulatory 

evaluation and the estimated costs of 

compliance in the AD Docket. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

Adoption of the Amendment 

■ Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new AD: 

2008–17–15 Boeing: Amendment 39–15653. 

Docket No. FAA–2008–0621; Directorate 

Identifier 2008–NM–015–AD. 

Effective Date 

(a) This airworthiness directive (AD) is 

effective October 2, 2008. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Boeing Model 737–

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

certificated in any category; as identified in 

Boeing Alert Service Bulletin 737–28A1221, 

Revision 1, dated November 9, 2007. 

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 (AMOC) 

according to paragraph (k) of this AD. The 

request should include a description of 

changes to the required inspections that will 

ensure the continued operational safety of 

the airplane. 

Unsafe Condition 

(d) This AD results from fuel system 

reviews conducted by the manufacturer. We 

are issuing this AD to prevent the center tank 

fuel densitometer from overheating and 

becoming a potential ignition source inside 

the center fuel tank, which, in combination 

with flammable fuel vapors, could result in 

a center fuel tank explosion and consequent 

loss of the airplane. 

Compliance 

(e) Comply with this AD within the 

compliance times specified, unless already 

done. 

Installation of the Hot Short Protector (HSP) 

(f) Within 60 months after the effective 

date of this AD, install the HSP support 

brackets and equipment for the fuel quantity 

indicating system (FQIS) fuel densitometer 

and do all the other specified actions as 

applicable, by accomplishing all of the 

applicable actions specified in the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–28A1221, Revision 1, 

dated November 9, 2007. 

Airworthiness Limitations (AWLs) Revision 

for AWL No. 28–AWL–07 

(g) Concurrently with accomplishing the 

actions required by paragraph (f) of this AD, 

revise the AWLs section of the Instructions 

for Continued Airworthiness (ICA) by 

incorporating AWL No. 28–AWL–07 of 

Subsection F, ‘‘AIRWORTHINESS 

LIMITATIONS—FUEL SYSTEM AWLs,’’ of 

Section 9 of the Boeing 737–600/700/800/900 

Maintenance Planning Data (MPD) 

Document, D626A001–CMR, Revision March 

2007 R2 (hereafter referred to as ‘‘the MPD’’). 

No Alternative Critical Design Configuration 

Control Limitations (CDCCLs) 

(h) After accomplishing the action 

specified in paragraph (g) of this AD, no 

alternative CDCCLs may be used unless the 

CDCCLs are approved as an alternative 

methods of compliance (AMOC) in 

accordance with the procedures specified in 

paragraph (k) of this AD. 

Credit for Actions Done According to 

Previous Issue of Service Bulletin 

(i) Actions done before the effective date of 

this AD in accordance with Boeing Alert 

Service Bulletin 737–28A1221, dated January 

14, 2007, are acceptable for compliance with 

the requirements of paragraph (f) of this AD. 

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50716 Federal Register / Vol. 73, No. 168 / Thursday, August 28, 2008 / Rules and Regulations 

Terminating Action for AWLs Revision 

(j) Incorporating AWL No. 28–AWL–07 

into the AWLs section of the ICA in 

accordance with paragraph (g)(3) of AD 

2008–10–10, amendment 39–15516, 

terminates the action required by paragraph 

(g) of this AD. 

AMOCs 

(k)(1) The Manager, Seattle Aircraft 

Certification Office, FAA, ATTN: Georgios 

Roussos, Aerospace Engineer, Systems and 

Equipment Branch, ANM–130S, 1601 Lind 

Avenue SW., Renton, Washington 98057–

3356; telephone (425) 917–6482; fax (425) 

917–6590; has the authority to approve 

AMOCs for this AD, if requested using 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. 

Material Incorporated by Reference 

(l) You must use Boeing Alert Service 

Bulletin 737–28A1221, Revision 1, dated 

November 9, 2007; and Airworthiness 

Limitation 28–AWL–07 of Section 9 of the 

Boeing 737–600/700/800/900 Maintenance 

Planning Data (MPD) Document, D626A001–

CMR, Revision March 2007 R2; 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 Boeing Commercial 

Airplanes, P.O. Box 3707, Seattle, 

Washington 98124–2207. 

(3) You may review copies of the service 

information incorporated by reference 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/ 

code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on August 

12, 2008. 

Michael J Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. E8–19367 Filed 8–27–08; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0148; Directorate 

Identifier 2007–NM–299–AD; Amendment 

39–15655; AD 2008–17–17] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 747 Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all 

Boeing Model 747 airplanes. This AD 

requires a one-time inspection of certain 

fuselage skins at section 41 to find any 

external doublers that cover the 

inspection areas and to identify the 

external doublers that end on a stringer 

and those that do not, and related 

investigative and corrective actions if 

necessary. This AD results from reports 

of cracks found at fastener locations in 

the fuselage skins at section 41. We are 

issuing this AD to detect and correct 

fuselage skin cracks at fastener locations 

along the skin-to-stringer attachments, 

which could join together and become 

large and consequently result in rapid 

decompression of the cabin. 

DATES: This AD is effective October 2, 

2008. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of October 2, 2008. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, P.O. Box 3707, 

Seattle, Washington 98124–2207. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility between 9 

a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD 

docket contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The address for the 

Docket Office (telephone 800–647–5527) 

is the Document Management Facility, 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: Ivan 

Li, Aerospace Engineer, Airframe 

Branch, ANM–120S, FAA, Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue, SW., Renton, Washington 

98057–3356; telephone (425) 917–6437; 

fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an airworthiness 

directive (AD) that would apply to all 

Boeing Model 747 airplanes. That 

NPRM was published in the Federal 

Register on February 8, 2008 (73 FR 

7486). That NPRM proposed to require 

a one-time inspection of certain fuselage 

skins at section 41 to find any external 

doublers that cover the inspection areas 

and to identify the external doublers 

that end on a stringer and those that do 

not, and related investigative and 

corrective actions if necessary. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comments received from 

the two commenters. 

Support for the NPRM 

Boeing concurs with the contents of 

the NPRM. 

Request to Either Delay Issuance of the 

AD or Extend the Compliance Time 

Japan Airlines (JAL) requests that we 

delay issuance of the AD until Boeing 

has published a revision to Boeing Alert 

Service Bulletin 747–53A2704, dated 

October 4, 2007, to extend the 

compliance time from 16,000 total flight 

cycles to 25,000 total flight cycles for 

accomplishing the general visual 

inspection for external doublers in 

Areas 2 and 3. If we cannot delay 

issuance of the AD, then JAL requests 

that we revise the compliance time 

accordingly in this AD. JAL states that 

Boeing has advised that only the 

inspection of Area 1 must be done 

before 16,000 total flight cycles, and that 

Areas 2 and 3 should be inspected 

together with the high frequency eddy 

current inspection of the skin-to-stringer 

attachments before 25,000 total flight 

cycles. JAL asserts that Boeing will 

revise the compliance time in the next 

revision to the service bulletin. 

We do not agree to delay issuance of 

this AD, or to revise the compliance 

time for inspecting for external doublers 

in Areas 2 and 3. We have coordinated 

with Boeing, and Boeing has no plans, 

at this time, to revise the service 

bulletin. Boeing also has confirmed that 

the inspection of Areas 1, 2, and 3 was 

left at 16,000 total flight cycles for 

simplicity of the compliance table in the 

service bulletin. Therefore, we agree 

that, for Groups 1 through 5 airplanes, 

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