Federal Register / Vol. 74, No. 129 / Wednesday, July 8, 2009 / Rules and Regulations 32411 

By the Office of Thrift Supervision, 

Deborah Dakin, 

Acting Chief Counsel. 

By order of the National Credit Union 

Administration Board, June 18, 2009. 

Mary F. Rupp, 

Secretary of the Board. 

By Direction of the Commission. 

Donald S. Clark, 

Secretary. 

[FR Doc. E9–16030 Filed 7–7–09; 8:45 am] 

BILLING CODE 4810–33–P; 6210–01–P; 6714–01–P; 

6720–01–P; 7535–01–P; 3084–88–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2009–0044; Directorate 

Identifier 2008–NM–132–AD; Amendment 

39–15953; AD 2009–14–03] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier 

Model CL–600–1A11 (CL–600), CL– 

600–2A12 (CL–601), CL–600–2B16 (CL– 

601–3A, CL–601–3R, and CL–604) 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

originated 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: 

There have been several Stick Pusher 

Capstan Shaft failures causing the dormant 

loss or severe degradation of the stick pusher 

function. * * * 

Dormant loss or severe degradation of 

the stick pusher function could result in 

reduced controllability of the airplane. 

We are issuing this AD to require 

actions to correct the unsafe condition 

on these products. 

DATES: This AD becomes effective 

August 12, 2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of August 12, 2009. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue, SE., 

Washington, DC. 

FOR FURTHER INFORMATION CONTACT: 

Bruce Valentine, Aerospace Engineer, 

Systems and Flight Test Branch, ANE– 

172, FAA, New York Aircraft 

Certification Office, 1600 Stewart 

Avenue, Suite 410, Westbury, New York 

11590; telephone (516) 228–7328; fax 

(516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

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 February 23, 2009 (74 FR 

8039). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 

There have been several Stick Pusher 

Capstan Shaft failures causing the dormant 

loss or severe degradation of the stick pusher 

function. This directive is issued to revise the 

first flight of the day check [in the Airplane 

Flight Manual] of the stall protection system 

to detect a degradation of the stick pusher 

function. It also introduces a new periodic 

maintenance task [in the Airworthiness 

Limitations Section of the Instructions for 

Continuing Airworthiness] to check the 

structural integrity of the stick pusher 

capstan shaft. 

Dormant loss or severe degradation of 

the stick pusher function could result in 

reduced controllability of the airplane. 

You may obtain further information by 

examining the MCAI in the AD docket. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Conclusion 

We reviewed the available data 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 our FAA 

policies. Any such differences are 

highlighted in a Note within the AD. 

Costs of Compliance 

We estimate that this AD will affect 

707 products of U.S. registry. We also 

estimate that it will take about 1 workhour 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 $56,560, or $80 per product. 

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 the 

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:// 


sroberts on DSKD5P82C1PROD with RULES
32412 Federal Register / Vol. 74, No. 129 / Wednesday, July 8, 2009 / Rules and Regulations 

www.regulations.gov; or in person at the 

Docket Operations office 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 Operations 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: 

2009–14–03 Bombardier, Inc. (Formerly 

Canadair): Amendment 39–15953. 

Docket No. FAA–2009–0044; Directorate 

Identifier 2008–NM–132–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective August 12, 2009. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to the airplanes listed 

in Table 1 of this AD, certificated in any 

category. 

TABLE 1—APPLICABILITY

Bombardier model— Serial Nos.— 

CL–600–1A11 (CL–600) airplanes ........................................................................................................................ 1004 through 1085 inclusive. 

CL–600–2A12 (CL–601) airplanes ........................................................................................................................ 3001 through 3066 inclusive. 

CL–600–2B16 (CL–601–3A, CL–601–3R) airplanes ............................................................................................ 5001 through 5194 inclusive. 

CL–600–2B16 (CL–604) airplanes ........................................................................................................................ 5301 thorough 5665 inclusive. 

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 according 

to paragraph (g)(1) 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. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 27: Flight Controls. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

There have been several Stick Pusher 

Capstan Shaft failures causing the dormant 

loss or severe degradation of the stick pusher 

function. This directive is issued to revise the 

first flight of the day check [in the Airplane 

Flight Manual] of the stall protection system 

to detect a degradation of the stick pusher 

function. It also introduces a new periodic 

maintenance task [in the Airworthiness 

Limitations Section of the Instructions for 

Continuing Airworthiness] to check the 

structural integrity of the stick pusher 

capstan shaft. 

Dormant loss or severe degradation of the 

stick pusher function could result in reduced 

controllability of the airplane. 

Actions and Compliance 

(f) Unless already done, do the following 

actions. 

(1) Within 30 days after the effective date 

of this AD: Revise the Normal Procedures 

section of the applicable airplane flight 

manual (AFM) by inserting a copy of the 

applicable TR listed in Table 2 of this AD. 

Thereafter, operate the airplanes per the 

procedures specified in the applicable TR, 

except as provided by paragraph (g)(1) of this 

AD. If the operator has an AFM that is not 

listed in Table 2 of this AD, within 30 days 

after the effective date of this AD, revise the 

AFM using a method approved by the FAA 

or Transport Canada Civil Aviation (TCCA) 

(or its delegated agent). 

TABLE 2—TEMPORARY REVISIONS TO THE AFM 

For Bombardier model— 

Use Canadair 

temporary 

prevision— 

Dated— To the normal procedures section of— 

CL–600–1A11 (CL–600) airplanes ......................... 600/23 January 30, 2007 ...... Canadair Challenger CL–600–1A11 AFM. 

CL–600–1A11 (CL–600) airplanes ......................... 600–1/18 January 30, 2007 ...... Canadair Challenger CL–600–1A11 AFM 

(Winglets). 

CL–600–2A12 (CL–601) airplanes ......................... 601/15 January 30, 2007 ...... Canadair Challenger CL–600–2A12 AFM, PSP 

601–1B–1. 

CL–600–2A12 (CL–601) airplanes ......................... 601/16 January 30, 2007 ...... Canadair Challenger CL–600–2A12 AFM, PSP 

601–1A–1. 

CL–600–2A12 (CL–601) airplanes ......................... 601/20 January 30, 2007 ...... Canadair Challenger CL–600–2A12 AFM, PSP 

601–1B. 

CL–600–2A12 (CL–601) airplanes ......................... 601/28 January 30, 2007 ...... Canadair Challenger CL–600–2A12 AFM. 

CL–600–2B16 (CL–601–3A and CL–601–3R) airplanes.601/27 January 30, 2007 ...... Canadair Challenger CL–600–2B16 AFM, PSP 

601A–1. 

CL–600–2B16 (CL–601–3A and CL–601–3R) airplanes.601/28 January 30, 2007 ...... Canadair Challenger CL–600–2B16 AFM, PSP 

601A–1–1. 

CL–600–2B16 (CL–604) airplanes ......................... 604/22 January 30, 2007 ...... Canadair Challenger CL–604 AFM, PSP 604–1. 

(2) When information identical to that in 

a TR specified in paragraph (f)(1) of this AD 

has been included in the general revisions of 

the applicable AFM, the general revisions 

may be inserted into the AFM, and the TR 

may be removed from that AFM. 


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Federal Register / Vol. 74, No. 129 / Wednesday, July 8, 2009 / Rules and Regulations 32413 

(3) Within 30 days after the effective date 

of this AD: Revise the Airworthiness 

Limitations section of the Instructions for 

Continued Airworthiness by incorporating 

the applicable task in the TR listed in Table 

3 of this AD. For all tasks identified in the 

TRs, the initial compliance time starts from 

the later of the times specified in paragraph 

(f)(3)(i) and (f)(3)(ii) of this AD. Thereafter, 

except as provided by paragraph (g)(1) of this 

AD, no alternative maintenance task intervals 

may be used. 

(i) Within the compliance time specified in 

the ‘‘Check Interval’’ or ‘‘Task Interval,’’ as 

applicable, after the effective date of this AD. 

(ii) Within the compliance time specified 

in the ‘‘Check Interval’’ or ‘‘Task Interval,’’ as 

applicable, after the date of issuance of the 

original Canadian airworthiness certificate or 

the date of issuance of the original Canadian 

export certificate of airworthiness. 

TABLE 3—TEMPORARY REVISIONS TO THE AIRWORTHINESS LIMITATIONS SECTION

For Bombardier model— 

Use Canadair 

temporary 

revision— 

Dated— To the airworthiness limitations section of— 

CL–600–1A11 (CL–600) airplanes ............................ 5–138 June 26, 2007 ....... Canadair Challenger Time Limits/Maintenance

Checks (TLMC), PSP 605, Chapter 5, Section 5– 

10–30. 

CL–600–2A12 (CL–601) airplanes ............................ 5–226 June 26, 2007 ....... Canadair Challenger TLMC, PSP 601–5, Chapter 

5, Section 5–10–30. 

CL–600–2B16 (CL–601–3A and CL–601–3R) airplanes.5–239 June 26, 2007 ....... Canadair Challenger TLMC, PSP 601A–5, Chapter 

5, Section 5–10–30. 

CL–600–2B16 (CL–604) airplanes ............................ 5–2–32 May 31, 2007 ........ Canadair Challenger CL–604 TLMC, Chapter 5, 

Section 5–10–40. 

(4) When the information in applicable TR 

listed in Table 3 of this AD has been 

included in the general revisions of the 

applicable chapter of the Airworthiness 

Limitations section, the TR may be removed 

from the Airworthiness Limitations section of 

the Instruction for Continued Airworthiness. 

FAA AD Differences 

Note 2: 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: Bruce 

Valentine, Aerospace Engineer, Systems and 

Flight Test Branch, ANE–172, FAA, New 

York Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, New 

York 11590; telephone (516) 228–7328; fax 

(516) 794–5531. 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 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. 

(4) Special Flight Permits: Special flight 

permits, as described in Section 21.197 and 

Section 21.199 of the Federal Aviation 

Regulations (14 CFR 21.197 and 21.199), are 

not allowed. 

Related Information 

(h) Refer to MCAI Canadian Airworthiness 

Directive CF–2008–12, dated February 8, 

2008, and the service information listed in 

Table 4 of this AD, for related information. 

TABLE 4—ALL SERVICE INFORMATION

Canadair TR— Dated— To the— 

5–138 .................................. June 26, 2007 .................... Canadair Challenger TLMC, PSP 605, Chapter 5, Section 5–10–30. 

5–226 .................................. June 26, 2007 .................... Canadair Challenger TLMC, PSP 601–5, Chapter 5, Section 5–10–30. 

5–239 .................................. June 26, 2007 .................... Canadair Challenger TLMC, PSP 601A–5, Chapter 5, Section 5–10–30. 

5–2–32 ................................ May 31, 2007 ..................... Canadair Challenger CL–604 TLMC, Chapter 5, Section 5–10–40. 

600/23 ................................. January 30, 2007 ............... Canadair Challenger CL–600–1A11 AFM. 

600–1/18 ............................. January 30, 2007 ............... Canadair Challenger CL–600–1A11 AFM (Winglets). 

601/15 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 AFM, PSP 601–1B–1. 

601/16 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 AFM, PSP 601–1A–1. 

601/20 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 AFM, PSP 601–1B. 

601/27 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2B16 AFM, PSP 601A–1. 

601/28 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 AFM. 

601/28 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2B16 AFM, PSP 601A–1–1. 

604/22 ................................. January 30, 2007 ............... Canadair Challenger CL–604 AFM, PSP 604–1. 

Material Incorporated by Reference 

(i) You must use the service information 

contained in Table 5 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 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 


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32414 Federal Register / Vol. 74, No. 129 / Wednesday, July 8, 2009 / Rules and Regulations 

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 5—MATERIAL INCORPORATED BY REFERENCE

Canadair temporary 

revision— Dated— To the— 

5–138 .................................. June 26, 2007 .................... Canadair Challenger Time Limits/Maintenance Checks, PSP 605, Chapter 5, Section 5–10–30. 

5–226 .................................. June 26, 2007 .................... Canadair Challenger Time Limits/Maintenance Checks, PSP 601–5, Chapter 5, Section 5–10–30. 

5–239 .................................. June 26, 2007 .................... Canadair Challenger Time Limits/Maintenance Checks, PSP 601A–5, Chapter 5, 

Section 5–10–30. 

5–2–32 ................................ May 31, 2007 ..................... Canadair Challenger CL–604 Time Limits/Maintenance Checks, Chapter 5, Section 

5–10–40. 

600/23 ................................. January 30, 2007 ............... Canadair Challenger CL–600–1A11 Airplane Flight Manual. 

600–1/18 ............................. January 30, 2007 ............... Canadair Challenger CL–600–1A11 Airplane Flight Manual (Winglets). 

601/15 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 Airplane Flight Manual, PSP 601–1B–1. 

601/16 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 Airplane Flight Manual, PSP 601–1A–1. 

601/20 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 Airplane Flight Manual, PSP 601–1B. 

601/27 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2B16 AFM Airplane Flight Manual PSP 601A–1. 

601/28 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2A12 Airplane Flight Manual. 

601/28 ................................. January 30, 2007 ............... Canadair Challenger CL–600–2B16 Airplane Flight Manual, PSP 601A–1–1. 

604/22 ................................. January 30, 2007 ............... Canadair Challenger CL–604 Airplane Flight Manual, PSP 604–1. 

Issued in Renton, WA, on June 11, 2009. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. E9–15394 Filed 7–7–09; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0933; Directorate 

Identifier 2007–NM–261–AD; Amendment 

39–15956; AD 2009–14–06] 

RIN 2120–AA64 

Airworthiness Directives; Boeing 

Model 777 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 all Boeing Model 777 

airplanes. That AD currently requires, 

for the drive mechanism of the 

horizontal stabilizer, repetitive detailed 

inspections for discrepancies, repetitive 

lubrication of the ballnut and ballscrew, 

repetitive measurements of the freeplay 

between the ballnut and the ballscrew, 

and corrective action if necessary. This 

new AD revises the compliance times of 

the existing AD. This AD results from a 

report of extensive corrosion of a 

ballscrew in the drive mechanism of the 

horizontal stabilizer on a Boeing Model 

757 airplane, which is similar in design 

to the ballscrew on Model 777 airplanes. 

We are issuing this AD to prevent an 

undetected failure of the primary load 

path for the ballscrew in the drive 

mechanism of the horizontal stabilizer 

and subsequent wear and failure of the 

secondary load path, which could lead 

to loss of control of the horizontal 

stabilizer and consequent loss of control 

of the airplane. 

DATES: This AD becomes effective 

August 12, 2009. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of August 12, 2009. 

ADDRESSES: 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 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: 

Kelly McGuckin, Aerospace Engineer, 

Systems and Equipment Branch, ANM– 

130S, FAA, Seattle Aircraft Certification 

Office, 1601 Lind Avenue, SW., Renton, 

Washington 98057–3356; telephone 

(425) 917–6490; fax (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that 

supersedes AD 2007–17–12, amendment 

39–15170 (72 FR 49158, August 28, 

2007). The existing AD applies to all 

Boeing Model 777 airplanes. That 

NPRM was published in the Federal 

Register on August 29, 2008 (73 FR 

50896). That NPRM proposed to retain 

the actions specified in the existing AD 

(i.e., for the drive mechanism of the 

horizontal stabilizer, repetitive detailed 

inspections for discrepancies, repetitive 

lubrication of the ballnut and ballscrew, 

repetitive measurements of the freeplay 

between the ballnut and the ballscrew, 

and corrective action if necessary) but 

with new initial inspection compliance 

times. 

New Service Information 

Since issuance of the NPRM, we have 

reviewed Boeing Service Bulletin 777– 

27A0059, Revision 2, dated January 15, 

2009. This revision of the service 

bulletin is essentially the same as 

Revision 1 of the service bulletin. (We 

referred to Boeing Alert Service Bulletin 

777–27A0059, Revision 1, August 18, 

2005, as the appropriate source of 

service information for doing the actions 

proposed in the NPRM.) Revision 2 of 

the service bulletin specifies similar 


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