Federal Register / Vol. 74, No. 215 / Monday, November 9, 2009 / Rules and Regulations 57561 

and ball nut could potentially lead to a flap 

system jam. A Temporary Revision (TR) has 

been made to the Bombardier CL–600–2B19 

Maintenance Requirements Manual (MRM), 

Appendix A, ‘‘Certification Maintenance 

Requirements’’ (CMR) to ensure that 

unacceptable wear on the nut and ball screw 

is detected and corrected. 

Revision 1 of this directive introduces a 

new phase-in schedule for performing a new 

CMR task C27–50–300–01. 

The unsafe condition is a flap system jam, 

which could result in a skewed flap 

condition with consequent reduced 

controllability of the airplane. 

Actions and Compliance 

(f) Unless already done, within 30 days 

after the effective date of this AD, revise the 

Airworthiness Requirements Section of the 

Bombardier CL–600–2B19 MRM to include 

the information in Bombardier TR 2A–41, 

dated November 7, 2007, to Appendix A of 

the Airworthiness Requirements, Part 2, of 

the Bombardier CL–600–2B19 MRM. The 

initial compliance with the new CMR task 

must be done within 500 flight hours after 

the effective date of this AD. 

Note 2: The actions required by paragraph 

(f) of this AD may be done by inserting a 

copy of Bombardier TR 2A–41, dated 

November 7, 2007, to Appendix A of the 

Airworthiness Requirements, Part 2, of the 

Bombardier CL–600–2B19 MRM. When this 

TR has been included in general revisions of 

the MRM, the TR may be removed from the 

MRM, provided the relevant information in 

the general revision is identical to that in 

Bombardier TR 2A–41, dated November 7, 

2007. 

FAA AD Differences 

Note 3: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), 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: Fabio 

Buttitta, Aerospace Engineer, Airframe and 

Mechanical Systems Branch, ANE–171, FAA, 

New York ACO, 1600 Stewart Avenue, Suite 

410, Westbury, New York 11590; telephone 

(516) 228–7303; fax (516) 794–5531. Before 

using any approved AMOC on any airplane 

to which the AMOC applies, notify your 

principal maintenance inspector (PMI) or 

principal avionics inspector (PAI), as 

appropriate, or lacking a principal inspector, 

your local Flight Standards District Office. 

(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 Canadian Airworthiness 

Directive CF–2008–33R1, dated January 9, 

2009; and Bombardier TR 2A–41, dated 

November 7, 2007, to Appendix A of the 

Airworthiness Requirements, Part 2, of the 

Bombardier CL–600–2B19 MRM; for related 

information. 

Material Incorporated by Reference 

(i) You must use Bombardier Temporary 

Revision 2A–41, dated November 7, 2007, to 

Appendix A of the Airworthiness 

Requirements, Part 2, of the Bombardier CL– 

600–2B19 Maintenance Requirements 

Manual, 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., 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–5000; fax 514– 

855–7401; e-mail 

thd.crj@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 or 425–227–1152. 

(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 October 

19, 2009. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E9–26296 Filed 11–6–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0699 Directorate 

Identifier 2009–CE–042–AD; Amendment 

39–16047; AD 2009–21–08] 

RIN 2120–AA64 

Airworthiness Directives; PIAGGIO 

AERO INDUSTRIES S.p.A Model 

PIAGGIO P–180 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) 

issued 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: 

Some cases of uncommanded steering 

action were observed, while the steering 

system was switched off. A leakage in the 

Steering Select/Bypass Valve, installed in the 

Steering Manifold, when closed, is suspected 

to have caused the uncommanded steering. 

If left uncorrected, this condition could 

lead to a potentially dangerous veer along the 

runway; in fact, according to the Aircraft 

Flight Manual limitations, the steering 

system must be in ‘off’ position during 

landing and takeoff (in this case when 

airspeed is higher than 60 knots). 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

December 14, 2009. 

On December 14, 2009, the Director of 

the Federal Register approved the 

incorporation by reference of certain 

publications listed in this AD. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at 

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: 

Sarjapur Nagarajan, Aerospace Engineer, 

FAA, Small Airplane Directorate, 901 

Locust, Room 301, Kansas City, 

Missouri 64106; telephone: (816) 329– 

4145; fax: (816) 329–4090. 

SUPPLEMENTARY INFORMATION: 

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57562 Federal Register / Vol. 74, No. 215 / Monday, November 9, 2009 / Rules and Regulations 

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 August 5, 2009 (74 FR 

38991). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

Some cases of uncommanded steering 

action were observed, while the steering 

system was switched off. A leakage in the 

Steering Select/Bypass Valve, installed in the 

Steering Manifold, when closed, is suspected 

to have caused the uncommanded steering. 

If left uncorrected, this condition could 

lead to a potentially dangerous veer along the 

runway; in fact, according to the Aircraft 

Flight Manual limitations, the steering 

system must be in ‘off’ position during 

landing and takeoff (in this case when 

airspeed is higher than 60 knots). For the 

reasons stated above, this new AD mandates 

repetitive inspections for leakage of the Nose 

Landing Gear steering manifold. 

The MCAI requires, if any inspection 

finds leakage of the steering manifold, 

the replacement of the steering 

manifold. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

have considered the comment received. 

Mr. Carlo Cardu, Piaggio Aero 

Industries, states that revisions of 

airplane maintenance manuals (AMM) 

will be issued. He suggests that the final 

AD action include a statement that later 

revisions of AMM is acceptable for 

compliance with the requirements of the 

AD. 

The FAA does not agree with 

including the phrase ‘‘or later revision’’ 

after the referenced service information. 

The FAA cannot approve and legally 

reference documents that currently do 

not exist. When these documents are 

completed and approved, the FAA can 

issue an alternative method of 

compliance if the FAA determines that 

the incorporation of the procedures 

provides an acceptable level of safety to 

the unsafe condition specified in the 

AD. 

We are not changing the final rule AD 

action as a result of this comment. 

Conclusion 

We reviewed the available data, 

including the comment received, 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 

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 FAA policies. 

Any such differences are highlighted in 

a NOTE within the AD. 

Costs of Compliance 

We estimate that this AD will affect 

63 products of U.S. registry. We also 

estimate that it will take about 8 workhours per product to comply with the 

basic requirements of this AD. The 

average labor rate is $80 per work-hour. 

Based on these figures, we estimate 

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

to be $40,320 or $640 per product. 

In addition, we estimate that any 

necessary follow-on actions will take 

about 16 work-hours and require parts 

costing $0, for a cost of $1,280 per 

product. We have no way of 

determining the number of products 

that may need these actions. 

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 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 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. 

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 the NPRM, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket 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 adding 

the following new AD: 

2009–21–08 PIAGGIO AERO INDUSTRIES 

S.p.A.: Amendment 39–16047; Docket 

No. FAA–2009–0699; Directorate 

Identifier 2009–CE–042–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective December 14, 2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Model P–180 

airplanes, all serial numbers (S/N), 

certificated in any category. 

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Federal Register / Vol. 74, No. 215 / Monday, November 9, 2009 / Rules and Regulations 57563 

Subject 

(d) Air Transport Association of America 

(ATA) Code 32: Landing Gear. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Some cases of uncommanded steering 

action were observed, while the steering 

system was switched off. A leakage in the 

Steering Select/Bypass Valve, installed in the 

Steering Manifold, when closed, is suspected 

to have caused the uncommanded steering. 

If left uncorrected, this condition could 

lead to a potentially dangerous veer along the 

runway; in fact, according to the Aircraft 

Flight Manual limitations, the steering 

system must be in ‘‘off’’ position during 

landing and takeoff (in this case when 

airspeed is higher than 60 knots). For the 

reasons stated above, this new AD mandates 

repetitive inspections for leakage of the Nose 

Landing Gear steering manifold. 

The MCAI requires, if any inspection finds 

leakage of the steering manifold, the 

replacement of the steering manifold. 

Actions and Compliance 

(f) Unless already done, do the following 

actions: 

(1) Within the next 6 months after 

December 14, 2009 (the effective date of this 

AD) or within the next 100 hours time-inservice (TIS) after December 14, 2009 (the 

effective date of this AD), whichever occurs 

first, and repetitively thereafter at intervals 

not to exceed every 165 hours TIS, do a 

functional test of the nose landing gear (NLG) 

steering manifold. Follow the 

accomplishment instructions of PIAGGIO 

AERO INDUSTRIES S.p.A. Service Bulletin 

(Mandatory) N. 80–0249 (includes 

CONFIRMATION SLIP), Rev. 1, dated May 

27, 2009. 

(2) Upon installation of a NLG steering 

manifold on any airplane, do a functional test 

of the NLG steering manifold. Repetitively 

thereafter at intervals not to exceed every 165 

hours TIS, do a functional test of the NLG 

steering manifold. Follow the 

accomplishment instructions of PIAGGIO 

AERO INDUSTRIES S.p.A. Service Bulletin 

(Mandatory) N. 80–0249 (includes 

CONFIRMATION SLIP), Rev. 1, dated May 

27, 2009. 

(3) If during any inspection required in 

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

movement of a NLG steering manifold is 

found, using the compliance times in the 

accomplishment instructions of PIAGGIO 

AERO INDUSTRIES S.p.A. Service Bulletin 

(Mandatory) N. 80–0249 (includes 

CONFIRMATION SLIP), Rev. 1, dated May 

27, 2009, replace the NLG steering manifold 

following (for S/N 1004 through 1104) pages 

1 through 8 dated March 1, 2006; 201, 202, 

204, and 206 through 216, dated June 16, 

2008; 203 and 205, dated March 1, 2006; and 

501 through 506, dated March 1, 2006, of 

PIAGGIO AERO PIAGGIO P.180 AVANTI 

Maintenance Manual, Report No. 9066, 32– 

50–00, Revision No. D2, revised June 16, 

2008; or (for S/N 1105 and greater) pages 1 

through 8, dated June 30, 2005; 201, 202, and 

207 through 209, dated December 19, 2008; 

203 and 205, dated June 30, 2005; 204, 206, 

and 210 through 216, dated September 14, 

2007; and 501 through 506, dated June 30, 

2005, of PIAGGIO AERO PIAGGIO P.180 

AVANTI II Maintenance Manual, Report No. 

180–MAN–0200–01105, 32–50–00, Revision 

No. A3, revised December 19, 2008. 

FAA AD Differences 

Note: This AD differs from the MCAI and/ 

or service information as follows: No 

differences. 

Other FAA AD Provisions 

(g) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Standards Office, 

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: Sarjapur Nagarajan, Aerospace 

Engineer, FAA, Small Airplane Directorate, 

901 Locust, Room 301, Kansas City, Missouri 

64106; telephone: (816) 329–4145; fax: (816) 

329–4090. 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. 

(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. 

(3) Reporting Requirements: For any 

reporting requirement in this AD, under the 

provisions of the Paperwork Reduction Act 

(44 U.S.C. 3501 et seq.), 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 EASA AD 2009–0129, 

dated June 19, 2009; PIAGGIO AERO 

INDUSTRIES S.p.A. Service Bulletin 

(Mandatory) N. 80–0249 (includes 

CONFIRMATION SLIP), Rev. 1, dated May 

27, 2009; PIAGGIO AERO PIAGGIO P.180 

AVANTI Maintenance Manual, Report No. 

9066, 32–50–00, revised June 16, 2008, pages 

1 through 8, 201 through 216, and 501 

through 506; and PIAGGIO AERO PIAGGIO 

P.180 AVANTI II Maintenance Manual, 

Report No. 180–MAN–0200–01105, 32–50– 

00, revised December 19, 2008, pages 1 

through 8, 201 through 216, and 501 through 

506, for related information. 

Material Incorporated by Reference 

(i) You must use the 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 Piaggio Aero Industries 

S.p.a., Via Cibrario, 4–16154 Genoa, Italy; 

telephone +39 010 06481 741; fax: +39 010 

6481 309; Internet: http:// 

www.piaggioaero.com, or e-mail: 

MMicheli@piaggioaero.it. 

(3) You may review copies of the service 

information incorporated by reference for 

this AD at the FAA, Central Region, Office of 

the Regional Counsel, 901 Locust, Kansas 

City, Missouri 64106. For information on the 

availability of this material at the Central 

Region, call (816) 329–3768. 

(4) You may also review copies of the 

service information incorporated by reference 

for this AD 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. 

TABLE 1—MATERIAL INCORPORATED BY REFERENCE

Service information title Page(s) Revision Date 

PIAGGIO AERO INDUSTRIES S.p.A. Service Bulletin (Mandatory) N. 80–0249.1 through 9 ..................... Rev. 1 ................................. May 27, 2009. 

PIAGGIO AERO INDUSTRIES S.p.A. Service Bulletin (Mandatory) N. 80–0249.CONFIRMATION SLIP ... Rev. 1 ................................. Not Dated. 

PIAGGIO AERO PIAGGIO P.180 AVANTI Maintenance Manual, Report No. 9066, 32–50–00.Cover .............................. No. D2 ................................ Revised June 16, 2008. 

PIAGGIO AERO PIAGGIO P.180 AVANTI Maintenance Manual, Report No. 9066, 32–50–00.1 through 8 ..................... Not Applicable .................... March 1, 2006. 

PIAGGIO AERO PIAGGIO P.180 AVANTI Maintenance Manual, Report No. 9066, 32–50–00.201, 202, 204, and 206 

through 216.

Not Applicable .................... June 16, 2008. 

PIAGGIO AERO PIAGGIO P.180 AVANTI Maintenance Manual, Report No. 9066, 32–50–00.203 and 205 ................... Not Applicable .................... March 1, 2006. 

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57564 Federal Register / Vol. 74, No. 215 / Monday, November 9, 2009 / Rules and Regulations 

TABLE 1—MATERIAL INCORPORATED BY REFERENCE—Continued 

Service information title Page(s) Revision Date 

PIAGGIO AERO PIAGGIO P.180 AVANTI Maintenance Manual, Report No. 9066, 32–50–00.501 through 506 ............. Not Applicable .................... March 1, 2006. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

Cover .............................. No. A3 ................................ Revised December 19, 2008. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

1 through 8 ..................... Not Applicable .................... June 30, 2005. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

201, 202, and 207 

through 209.

Not Applicable .................... December 19, 2008. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

203 and 205 ................... Not Applicable .................... June 30, 2005. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

204, 206, and 210 

through 216.

Not Applicable .................... September 14, 2007. 

PIAGGIO AERO PIAGGIO P.180 AVANTI II Maintenance Manual, Report No. 180–MAN–0200– 

01105, 32–50–00.

501 through 506 ............. Not Applicable .................... June 30, 2005. 

Issued in Kansas City, Missouri, on 

October 7, 2009. 

Scott A. Horn, 

Acting Manager, Small Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E9–24651 Filed 11–6–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–1026; Directorate 

Identifier 2009–NM–197–AD; Amendment 

39–16084; AD 2009–23–10] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 737–300, –400, and –500 Series 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is superseding an 

existing airworthiness directive (AD) 

that applies to all Boeing Model 737– 

300, –400, and –500 series airplanes. 

The existing AD currently requires 

inspecting to determine if certain 

carriage spindles are installed, repetitive 

inspections for corrosion and 

indications of corrosion on affected 

carriage spindles, and if necessary, 

related investigative and corrective 

actions. The existing AD also provides 

optional terminating action. For certain 

airplanes, this new AD would reinstate 

the requirements of the existing AD. 

This AD results from the exclusion of 

certain carriage spindles from the 

requirements of the existing AD, and 

additional reports of corrosion found on 

carriage spindles that are located on the 

outboard trailing edge flaps. We are 

issuing this AD to detect and correct 

corrosion of the carriage spindle, which 

could result in fracture. Fracture of both 

the inboard and outboard carriage 

spindles, in the forward ends through 

the large diameters, on a flap, could 

adversely affect the airplane’s continued 

safe flight and landing. 

DATES: This AD becomes effective 

November 24, 2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of November 24, 2009. 

On August 5, 2008 (73 FR 42259, July 

21, 2008), the Director of the Federal 

Register approved the incorporation by 

reference of a certain other publication 

listed in the AD. 

We must receive any comments on 

this AD by December 24, 2009. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue, SE., 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; 

telephone 206–544–5000, extension 1, 

fax 206–766–5680; e-mail me.boecom@ 

boeing.com; Internet https:// 

www.myboeingfleet.com. 

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 street address for 

the Docket Office (telephone 800–647– 

5527) is in the ADDRESSES section. 

Comments will be available in the AD 

docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Nancy Marsh, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6440; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On July 10, 2008, we issued AD 2008– 

15–05, amendment 39–15617 (73 FR 

42259, July 21, 2008). That AD applies 

to all Boeing Model 737–300, –400, and 

–500 series airplanes. That AD requires 

inspecting to determine if certain 

carriage spindles are installed, repetitive 

inspections for corrosion and 

indications of corrosion on affected 

carriage spindles, and if necessary, 

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