Federal Register / Vol. 70, No. 218 / Monday, November 14, 2005 / Rules and Regulations 69069 

in Table 1 of this AD, no further work is 

required by this paragraph. 

TABLE 1.—AFFECTED ACT P/NS

D2827091100000 

D2827091100200 

D2827091100600 

D2827091300000 

D2827091300200 

D2827091300400 

D2827105100000 

D2827105100200 

D2827105100400 

D2827105200000 

D2827105200200 

D2827105200400 

D2827105300000 

D2827105300200 

D2827105300400 

D2827105400000 

D2827105400200 

D2827105400400 

D2827105400600 

D2827105400800 

D2827105500000 

D2827105500200 

D2827105500400 

D2827105600000 

D2827105600200 

D2827105600400 

D2827107500000 

D2827107500200 

Manhole Cover/Seal Replacement 

(g) Within 30 days (for Model A319–111, 

–112, –113, –114, –115, –131, –132, and –133 

airplanes) or 12 months (for Model A320–

111, –211, –212, –214, –231, –232, and –233 

airplanes; and Model A321–111, –112, and 

–131 airplanes) after the effective date of this 

AD: For each ACT P/N listed in Table 1 of 

this AD: Before further flight, replace the 

outer ACT manhole cover with a reinforced 

manhole cover and replace the outer 

manhole cover seal with a new seal, in 

accordance with the Accomplishment 

Instructions of Airbus Service Bulletin A320–

28–1105, Revision 02, dated March 11, 2005. 

Replacements are also acceptable if done 

before the effective date of this AD in 

accordance with Airbus Service Bulletin 

A320–28–1105, Revision 01, dated March 18, 

2003; and Airbus Service Bulletin A320–28–

1105, dated October 22, 2002. 

Parts Installation 

(h) As of the effective date of this AD, no 

person may install an ACT having any P/N 

listed in Table 1 of this AD, unless the 

actions required by paragraph (g) of this AD 

have been done for that ACT. 

Alternative Methods of Compliance 

(AMOCs) 

(i)(1) The Manager, International Branch, 

ANM–116, Transport Airplane Directorate, 

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. 

Related Information 

(j) French airworthiness directive F–2004–

038, dated March 17, 2004, also addresses the 

subject of this AD. 

Material Incorporated by Reference 

(k) You must use Airbus Service Bulletin 

A320–28–1105, Revision 02, dated March 11, 

2005, 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 Airbus, 1 Rond Point Maurice 

Bellonte, 31707 Blagnac Cedex, France, 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 October 

26, 2005. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 05–22219 Filed 11–10–05; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2005–22169; Directorate 

Identifier 2005–NM–094–AD; Amendment 

39–14361; AD 2005–23–03] 

RIN 2120–AA64 

Airworthiness Directives; Learjet 

Model 23, 24, 24A, 24B, 24B–A, 24C, 

24D, 24D–A, 24E, 24F, 24F–A, 25, 25A, 

25B, 25C, 25D, and 25F 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 

Learjet Model 23, 24, 24A, 24B, 24B–A, 

24C, 24D, 24D–A, 24E, 24F, 24F–A, 25, 

25A, 25B, 25C, 25D, and 25F airplanes. 

This AD requires replacement of the 

spherical accumulator for the main 

hydraulic system with a new cylindrical 

accumulator. For certain airplanes, this 

AD also requires modification of the 

accumulator pressure gauge. This AD 

results from reports of the failure of two 

thrust reverser accumulators (which are 

similar to the main hydraulic system’s 

spherical accumulator) and fatigue 

cracks found on four thrust reverser 

accumulators. We are issuing this AD to 

prevent failure of the spherical 

accumulator for the main hydraulic 

system, due to fatigue cracking on the 

threads, which could result in the loss 

of hydraulic power, damage to the 

surrounding airplane structure, and loss 

of airplane control. The failure of the 

accumulator could also result in injury 

to any persons in the surrounding area. 

The loss of hydraulic fluid could also 

leak onto a potential source of ignition 

and result in a consequent fire. 

DATES: This AD becomes effective 

December 19, 2005. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of December 19, 2005. 

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 Learjet, Inc., One Learjet Way, 

Wichita, Kansas 67209–2942, for service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: 

Robert Busto, Aerospace Engineer, 

Systems and Propulsion Branch, ACE–

116W, FAA, Wichita Aircraft 

Certification Office, 1801 Airport Road, 

Room 100, Mid-Continent Airport, 

Wichita, Kansas 67209; telephone (316) 

946–4157; fax (316) 946–4107. 

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 Learjet Model 23, 24, 

24A, 24B, 24B–A, 24C, 24D, 24D–A, 

24E, 24F, 24F–A, 25, 25A, 25B, 25C, 

25D, and 25F airplanes. That NPRM was 

published in the Federal Register on 

August 23, 2005 (70 FR 49210). That 

NPRM proposed to require replacement 

of the spherical accumulator for the 

main hydraulic system with a new 

cylindrical accumulator. For certain 

69070 Federal Register / Vol. 70, No. 218 / Monday, November 14, 2005 / Rules and Regulations 

airplanes, that proposed AD would also 

require modification of the accumulator 

pressure gauge. 

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. 

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 

operator nor increase the scope of the 

AD. 

Costs of Compliance 

There are about 434 airplanes of the 

affected design in the worldwide fleet. 

This AD will affect about 242 airplanes 

of U.S. registry. The actions will take 

about 9 to 13 work hours per airplane, 

at an average labor rate of $65 per work 

hour. Required parts will cost about 

$1,336 to $1,363 per airplane. Based on 

these figures, the estimated cost of the 

AD for U.S. operators is $464,882 to 

$534,336, or $1,921 to $2,208 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): 

2005–23–03 Learjet: Amendment 39–14361. 

Docket No. FAA–2005–22169; 

Directorate Identifier 2005–NM–094–AD. 

Effective Date 

(a) This AD becomes effective December 

19, 2005. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Learjet Model 23, 24, 

24A, 24B, 24B–A, 24C, 24D, 24D–A, 24E, 

24F, 24F–A, 25, 25A, 25B, 25C, 25D, and 25F 

airplanes, certificated in any category; having 

serial numbers 23–003 through 23–099 

inclusive, 24–100 through 24–284 inclusive, 

and 25–003 through 25–153 inclusive. 

Unsafe Condition 

(d) This AD results from reports of the 

failure of two thrust reverser accumulators 

(which are similar to the main hydraulic 

system’s accumulator) and fatigue cracks 

found on four thrust reverser accumulators. 

We are issuing this AD to prevent failure of 

the spherical accumulator for the main 

hydraulic system, due to fatigue cracking on 

the threads, which could result in the loss of 

hydraulic power, damage to the surrounding 

airplane structure, and loss of airplane 

control. The failure of the accumulator could 

also result in injury to any persons in the 

surrounding area. The loss of hydraulic fluid 

could also leak onto a potential source of 

ignition and result in a consequent fire. 

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. 

Replacement 

(f) Within 60 days after the effective date 

of this AD, replace the spherical accumulator 

having part number (P/N) 2380025–() or P/N 

2380167–() with a new cylindrical 

accumulator having P/N 2497202–801, in 

accordance with the Accomplishment 

Instructions of Bombardier Alert Service 

Bulletin A23/24/25–29–4, Revision 1, dated 

January 17, 2005. 

Concurrent Action 

(g) For airplanes having serial numbers 23–

003 through 23–014 inclusive: Prior to or 

concurrently with the actions in Bombardier 

Alert Service Bulletin A23/24/25–29–4, 

Revision 1, dated January 17, 2005, relocate 

the accumulator pressure gauge in 

accordance with Learjet Service Kit SK23–

215, dated April 4, 1966. 

Parts Installation 

(h) As of the effective date, no spherical 

accumulator having P/N 2380025–() or P/N 

2380167–() may be installed on any airplane. 

Previous Actions 

(i) Replacements done before the effective 

date of this AD in accordance with 

Bombardier Alert Service Bulletin A23/24/ 

25–29–4, dated August 20, 2004, are 

acceptable for compliance with the 

requirements of paragraph (f) of this AD. 

No Reporting Required 

(j) Although the service bulletin referenced 

in this AD specifies to submit certain 

information to the manufacturer, this AD 

does not include that requirement. 

Alternative Methods of Compliance 

(AMOCs) 

(k)(1) The Manager, Wichita 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) 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. 

Federal Register / Vol. 70, No. 218 / Monday, November 14, 2005 / Rules and Regulations 69071 

Material Incorporated by Reference 

(l) You must use Bombardier Alert Service 

Bulletin A23/24/25–29–4, Revision 1, dated 

January 17, 2005; and Learjet Service Kit 

SK23–215, dated April 4, 1966; as applicable, 

to perform the actions that are required by 

this AD, unless the AD specifies otherwise. 

(The issue date of Learjet Service Kit SK23–

215 is located only on the first and last pages 

of the document.) 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 Learjet, Inc., One Learjet Way, 

Wichita, Kansas 67209–2942, 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 October 

26, 2005. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 05–22220 Filed 11–10–05; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2005–22147; Directorate 

Identifier 2005–NM–114–AD; Amendment 

39–14371; AD 2005–23–13] 

RIN 2120–AA64 

Airworthiness Directives; Empresa 

Brasileira de Aeronautica S.A. 

(EMBRAER) Model EMB–135 

Airplanes, and Model EMB–145, 

–145ER, –145MR, –145LR, –145XR, 

–145MP, and –145EP 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 

EMBRAER Model EMB–135 airplanes, 

and Model EMB–145, –145ER, –145MR, 

–145LR, –145XR, –145MP, and –145EP 

airplanes. This AD requires 

modification of the logic of the steering 

system of the nose landing gear (NLG) 

wheel. This AD results from reports of 

the loss of directional control of the 

airplane on the ground after an internal 

failure of the NLG wheel steering 

system. We are issuing this AD to 

prevent failure of the NLG wheel 

steering system, which could result in 

reduced controllability of the airplane. 

DATES: This AD becomes effective 

December 19, 2005. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of December 19, 2005. 

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 Empresa Brasileira de 

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

343—CEP 12.225, Sao Jose dos 

Campos—SP, Brazil, for service 

information identified in this AD. 

FOR FURTHER INFORMATION CONTACT: 

Todd Thompson, Aerospace Engineer, 

International Branch, ANM–116, FAA, 

Transport Airplane Directorate, 1601 

Lind Avenue, SW., Renton, Washington 

98055–4056; telephone (425) 227–1175; 

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 would 

apply to certain EMBRAER Model 

EMB–135 airplanes, and Model EMB–

145, –145ER, –145MR, –145LR, –145XR, 

–145MP, and –145EP airplanes. That 

NPRM was published in the Federal 

Register on August 22, 2005 (70 FR 

48906). That NPRM proposed to require 

modification of the logic of the steering 

system of the nose landing gear (NLG) 

wheel. 

Comments 

We provided the public the 

opportunity to participate in the 

development of this AD. We have 

considered the comments received. 

Request To Reference Latest Revision of 

EMBRAER Service Bulletins 

Two commenters request that the 

NPRM reference EMBRAER Service 

Bulletin 145–32–0104, Revision 03, 

dated June 21, 2005 (EMBRAER Service 

Bulletin 145–32–0104, dated January 18, 

2005, is referenced as an appropriate 

source of service information for doing 

the actions specified in the NPRM). One 

commenter proposes revising 

paragraphs (c) and (f) of the NPRM to 

reference Revision 03 of the service 

bulletin. The same commenter also 

requests that EMBRAER Service 

Bulletin 145–32–0104, dated January 18, 

2005; EMBRAER Service Bulletin 145–

32–0104, Revision 01, dated April 14, 

2005; and EMBRAER Service Bulletin 

145–32–0104, Revision 02, dated May 

19, 2005; be considered acceptable for 

compliance with the NPRM. 

The same commenter also requests 

that paragraphs (c) and (f) of the NPRM 

be revised to reference EMBRAER 

Service Bulletin 145LEG–32–0020, 

Revision 01, June 21, 2005 (EMBRAER 

Service Bulletin 145LEG–32–0020, 

dated April 1, 2005, is referenced as an 

appropriate source of service 

information for doing the actions 

specified in the NPRM). In addition, the 

commenter requests that EMBRAER 

Service Bulletin 145LEG–32–0020, 

dated April 1, 2005, be considered 

acceptable for compliance with the 

NPRM. 

We agree with the commenters. The 

procedures in Revision 01 of EMBRAER 

Service Bulletin 145LEG–32–0020 are 

essentially the same as those in the 

original issue of the service bulletin. 

Revision 01 was issued to correct 

certain diagrams. 

The procedures in Revision 03 of 

EMBRAER Service Bulletin 145–32–

0104 are essentially the same as those in 

the original issue of the service bulletin. 

Revisions 01 and 02 were issued to 

revise certain figures. Revisions 01 and 

02 were also issued to split the 

effectivity of the service bulletin into 

groups and clarify that serial numbers 

14500839, 14500848, and 14500882 

have an equivalent factory-incorporated 

modification and are not affected 

airplanes. Revision 03 was issued to 

update kit information. 

No airplanes have been added to the 

effectivity of any revision of EMBRAER 

Service Bulletin 145–32–0104 or 

145LEG–32–0020. 

We have revised paragraphs (c) and (f) 

of this AD to reference EMBRAER 

Service Bulletin 145–32–0104, Revision 

03, dated June 21, 2005; and EMBRAER 

Service Bulletin 145LEG–32–0020, 

Revision 01, June 21, 2005. We have 

also added a new paragraph (g) to this 

AD to state that actions accomplished 

according to the previous issues of the 

service bulletins are acceptable for