Federal Register / Vol. 77, No. 4 / Friday, January 6, 2012 / Rules and Regulations 731 

(b) Unsafe Condition 

This AD defines the unsafe condition as a 

failure in the cyclic trim system. This 

condition could result in reduced 

controllability of the helicopter and 

subsequent loss of control of the helicopter. 

(c) Effective Date 

This airworthiness directive (AD) becomes 

effective January 23, 2012. 

(d) Compliance 

You are responsible for performing each 

action required by this AD within the 

specified compliance time unless it has 

already been accomplished prior to that time. 

(e) Required Actions 

Within 5 hours time-in-service (TIS) or at 

the next annual or 100 TIS inspection, 

whichever comes first: 

(1) For the Enstrom Model F–28C, F–28C– 

2, F–28F, 280C, 280F, and 280FX helicopters, 

modify the lateral and longitudinal trim 

actuator assemblies using the cyclic trim 

assembly kit (modification kit), P/N 28– 

01063–1, in accordance with the instructions 

in paragraph 6.1 of the Enstrom Service 

Directive Bulletin (SDB) No. 0110, Revision 

3, dated July 6, 2011 (SDB No. 0110 R3), 

except when the instructions specify using 

‘‘Aeroshell 22 grease’’ or ‘‘VC–3 Vibra-tite 

thread locker,’’ you may use an equivalent 

product. 

(2) For the Enstrom Model TH–28, 480, and 

480B helicopters, modify the lateral and 

longitudinal trim actuator assemblies using 

the modification kit, P/N 4230045–1, in 

accordance with the instructions in 

paragraph 6.1 of the Enstrom SDB No. T–039, 

Revision 3, dated July 6, 2011 (SDB No. T– 

039 R3), except when the instructions specify 

using ‘‘Aeroshell 22 grease’’ or ‘‘VC–3 Vibratite thread locker,’’ you may use an 

equivalent product, and you are not required 

to contact Enstrom Customer Service. 

(3) After modifying the lateral and 

longitudinal trim actuator assemblies in 

accordance with paragraphs (e)(1) or (e)(2) of 

this AD, before further flight, operationally 

test the trim limits in accordance with 

paragraph 6.2. of the SDB for your model 

helicopter, and determine during a flight test 

whether there is appropriate trim authority in 

accordance with paragraph 6.3. of the SDB 

for your model helicopter. 

(f) Special Flight Permits 

A one-time special-flight permit may be 

issued in accordance with 14 CFR 21.197 and 

21.199 provided the helicopter is operated 

with the trim system circuit breaker pulled. 

(g) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Safety Management 

Group, FAA, may approve AMOCs for this 

AD. Send your proposal to: Gregory J. 

Michalik, Enstrom Program Manager, FAA, 

Chicago Aircraft Certification Office, 2300 

East Devon Avenue, Room 107, Des Plaines, 

Illinois 60018; telephone (847) 294–7135; fax 

(847) 294–7834; email: 

gregory.michalik@faa.gov. 

(2) For operations conducted under a Part 

119 operating certificate or under Part 91, 

Subpart K, we suggest that you notify your 

principal inspector or lacking a principal 

inspector, the manager of the local flight 

standards district office or certificate holding 

district office before operating any aircraft 

complying with this AD through an AMOC. 

(h) Subject 

Joint Aircraft Service Component (JASC) 

Code: 6710: Main Rotor Control. 

(i) Material Incorporated by Reference 

You must use the specified portions of the 

following service information to do the 

specified actions required by this AD. 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) Enstrom Service Directive Bulletin No. 

0110, Revision 3, dated July 6, 2011, for the 

Model F–28C, F–28C–2, F–28F, 280C, 280F; 

and 

(3) 280FX or Enstrom Service Directive 

Bulletin No. T–039, Revision 3, dated July 6, 

2011, for the Model TH–28, 480, and 480B. 

(4) For service information identified in 

this AD, contact Enstrom Helicopter 

Corporation, 2209 22nd St., Menominee, 

Michigan 49858–0490; telephone: (906) 863– 

1200; email: customerservice@enstrom

helicopter.com; Web site: 

http://www.enstromhelicopter.com/enstrom_

new/enstrom_support_tec.html. 

(5) You may review copies of the 

referenced service information at the FAA, 

Office of the Regional Counsel, Southwest 

Region, 2601 Meacham Blvd., Room 663, Fort 

Worth, Texas 76137 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 Fort Worth, Texas, on December 

14, 2011. 

M. Monica Merritt, 

Acting Manager, Rotorcraft Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–32895 Filed 1–5–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0415; Directorate 

Identifier 2007–NM–256–AD; Amendment 

39–16904; AD 2011–27–03] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all 

Model 737 airplanes. This AD was 

prompted by a report of extensive 

corrosion of a ballscrew used in the 

drive mechanism of the horizontal 

stabilizer trim actuator (HSTA). This AD 

requires repetitive inspections, 

lubrications, and repetitive overhauls of 

the ball nut and ballscrew and 

attachment (Gimbal) fittings for the trim 

actuator of the horizontal stabilizer; 

various modification(s); and corrective 

actions if necessary; as applicable. We 

are issuing this AD to prevent an 

undetected failure of the primary load 

path for the ballscrew in the drive 

mechanism of the HSTA 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 is effective February 10, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of February 10, 2012. 

ADDRESSES: For Boeing 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; email 

me.boecom@boeing.com; Internet 

https://www.myboeingfleet.com. 

For Skytronics service information 

identified in this AD, contact Skytronics 

Inc., (cage 16553), P.O. Box 807, El 

Segundo, California 90245; telephone 

(310) 322–6284; fax (310) 322–6160; 

Internet http://www.skytronicsinc.com. 

For Linear Motion service information 

identified in this AD, contact Linear 

Motion LLC, 628 North Hamilton Street, 

Saginaw, Michigan 48602; telephone 

(989) 759–8300; Internet http:// 

www.thomsonaerospace.com. 

For Umbra Cuscinetti service 

information identified in this AD, 

contact Umbra Cuscinetti S.p.A., 

Technical Publications Department; Via 

Piave 12, Foligno (PG) 06034, Italy; 

telephone +39 (0742) 348300; fax +39 

(0742) 348277; email 

tech.pubs@umbracus.com. 

You may review copies of the 

referenced 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. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 


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732 Federal Register / Vol. 77, No. 4 / Friday, January 6, 2012 / Rules and Regulations 

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 (phone: (800) 647–5527) 

is 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; phone: (425) 

917–6490; fax: (425) 917–6590. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a supplemental notice of 

proposed rulemaking (NPRM) to amend 

14 CFR part 39 to include an 

airworthiness directive (AD) that would 

apply to the specified products. The 

supplemental NPRM was published in 

the Federal Register on April 19, 2011 

(76 FR 21815). The original NPRM was 

published in the Federal Register on 

April 28, 2008 (73 FR 22840). The 

supplemental NPRM proposed to 

require repetitive inspections, 

lubrications, and repetitive repairs/ 

overhauls of the ball nut and ballscrew 

and attachment (Gimbal) fittings for the 

trim actuator of the horizontal stabilizer; 

various installation(s); and corrective 

actions if necessary; as applicable. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal and the FAA’s 

response to each comment. 

Supportive Comments 

Boeing concurred with the content of 

the supplemental NPRM (76 FR 21815, 

April 19, 2011). Continental Airlines is 

complying with the actions and 

supported the supplemental NPRM. 

Requests To Change Certain 

Compliance Times 

US Airways and Southwest Airlines 

asked that the compliance time required 

by paragraph (g)(1) of the supplemental 

NPRM (76 FR 21815, April 19, 2011) be 

extended. US Airways stated that the 

compliance time for the modification is 

defined in Table 1 of paragraph 1.E., 

‘‘Compliance’’ of Boeing Alert Service 

Bulletin 737–27A1278, Revision 1, 

dated January 7, 2010; that compliance 

time is within 24,000 flight hours since 

delivery or 24,000 flight hours since last 

overhaul, whichever comes first. US 

Airways added that this compliance 

time would put all airplanes having 

HSTAs with more than 24,000 flight 

hours since delivery immediately out of 

compliance. US Airways adds that this 

compliance time, coupled with the 

compliance time in the supplemental 

NPRM, would give operators only 12 

months to modify all affected airplanes. 

US Airways noted that the compliance 

time specified in Table 1 of paragraph 

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

Service Bulletin 737–27A1277, Revision 

2, dated January 8, 2010, specifies 

‘‘whichever occurs later.’’ Southwest 

also stated that this compliance time 

would put its airplanes out of 

compliance because all its HSTAs have 

more than 24,000 flight hours since 

new. 

Senem Sevinic stated that the 

compliance times given in the 

referenced service information seem 

quite complicated, and asked that we 

specify the compliance times in the 

supplemental NPRM (76 FR 21815, 

April 19, 2011). 

We acknowledge the requests from US 

Airways and Southwest and provide the 

following information. We specified 

grace periods (i.e., compliance times 

after the effective date of the AD) in 

paragraph (g)(1)(ii) of the supplemental 

NPRM (76 FR 21815, April 19, 2011). 

However, we have extended the 

compliance time required by paragraph 

(g)(1)(ii)(C) of this AD to 24 months 

because this extension will provide an 

acceptable level of safety. We do not 

agree with the request to specify the 

compliance times in paragraph (g)(1)(i) 

of this AD; those compliance times 

adequately identify the time necessary 

to complete each task required by this 

AD. We have not changed the AD in this 

regard. 

Request To Clarify Certain Actions 

Delta asked that the ‘‘repair/overhaul’’ 

phrase specified in paragraph 

(g)(1)(ii)(B) of the supplemental NPRM 

(76 FR 21815, April 19, 2011) be 

changed to ‘‘overhaul’’ to match the 

language specified in Table 1 of 

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

Alert Service Bulletin 737–27A1277, 

Revision 2, dated January 8, 2010. Delta 

stated that paragraph (g)(1)(ii)(B) of the 

supplemental NPRM can lead to 

uncertainty with respect to the 

necessary time to accomplish a repair. 

Delta noted that the compliance time for 

repair/overhaul required by this 

paragraph is ‘‘within 12 months of the 

effective date of this AD;’’ however, 

Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 

2010, specifies repair prior to further 

flight if damage is found. Delta also 

noted that Table 1 of paragraph 1.E., 

‘‘Compliance,’’ of that service bulletin 

does not include the word ‘‘repair’’ 

when referring to the overhaul actions, 

and adds that the only compliance time 

specified for the repair is ‘‘before further 

flight.’’ 

We agree that some clarification is 

necessary. Therefore, we have changed 

the ‘‘repair/overhaul’’ phrase specified 

in the preamble and paragraphs (g), 

(g)(1), and (g)(1)(ii)(B) of this AD to 

specify ‘‘overhaul,’’ for the reasons 

provided by the commenter. 

Delta and US Airways asked that 

paragraph (g)(1)(ii)(C) of the 

supplemental NPRM (76 FR 21815, 

April 19, 2011) be changed to clarify the 

phrase ‘‘for the installation’’ to identify 

the individual installation and its 

applicability, or, in the case of multiple 

installations, to identify each individual 

installation and its applicability. Delta 

stated that the installation could be a 

single installation or multiple 

installations, and noted that the phrase 

could be referring to the ball nut tube 

retainer installation. US Airways infers 

that we are identifying many references 

in the service information about 

removing certain parts and installing 

improved parts. US Airways suggested 

using the word ‘‘modification’’ since 

using ‘‘installation’’ could be confusing, 

and noted that ‘‘installation’’ could refer 

to installation of modifications or 

installation of the HSTA. 

We agree that clarification is 

necessary for the reasons provided by 

the commenters. Therefore, in 

paragraph (g)(1)(ii)(C) of this AD we 

have changed the phrase ‘‘For the 

installation(s)’’ to ‘‘For the 

modification(s).’’ In addition, we have 

changed ‘‘installation(s)’’ to 

‘‘modification(s)’’ in the Summary 

section and paragraphs (g) and (g)(1) of 

this AD. 

Request To Change the Maintenance 

Planning Document (MPD) Task Cards 

Southwest asked that the work 

instructions in the MPD task cards be 

expanded to match the procedures for 

the detailed inspections specified in the 

service information specified in 

paragraph (g) of the supplemental 

NPRM (76 FR 21815, April 19, 2011). 

Southwest added that this would allow 

for one set of instructions to accomplish 

the inspections and would eliminate the 

human error factor involved with more 

than one set of inspection requirements 

since the task cards do not match the 

service information. Senem Sevinic 

asked that a note be added to the 


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Federal Register / Vol. 77, No. 4 / Friday, January 6, 2012 / Rules and Regulations 733 

supplemental NPRM that specifies 

which MPD tasks meet which steps in 

Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 

2010, because it is difficult to follow 

both the steps in this service 

information and the MPD tasks. 

We disagree with adding a note to this 

AD. The actions required by this AD, 

and referred to in Boeing Alert Service 

Bulletin 737–27A1277, Revision 2, 

dated January 8, 2010, address a specific 

safety issue. Accomplishing the tasks in 

the MPD task cards does not satisfy the 

actions specified in this service 

information; however, accomplishing 

the actions specified in this service 

information does satisfy certain MPD 

tasks. Because the MPD is a Boeing 

document and is not maintained by the 

FAA, operators may request any change 

to a task related to an MRB item through 

the Industry Steering Committee, which 

would ensure that approved changes are 

made to the applicable MPD task. We 

have not changed the AD in this regard. 

Request To Clarify Parts Installation 

Paragraph 

US Airways asked that we clarify the 

requirements in paragraph (i) of the 

supplemental NPRM (76 FR 21815, 

April 19, 2011) (the parts installation 

paragraph). US Airways reiterated the 

language used in this paragraph and 

asked if an operator may install a 

serviceable unit (i.e., inspected and 

lubricated) after the effective date of the 

AD, or if we are requiring only 

replacement units that are inspected 

and lubricated, and have zero time since 

overhaul and post-modification. 

We infer that the commenter is asking 

if unmodified ballscrew assemblies may 

be used on replacement HSTAs, 

provided that they are inspected and 

lubricated as required. For clarification, 

the ballscrew assembly in the drive 

mechanism of the HSTA may not be 

installed unless it has been inspected, 

and modified, as applicable, to ensure 

that HSTAs used as replacements are 

not exposed to the unsafe condition 

addressed in this AD. No change to the 

AD is necessary in this regard. 

Change to Final Rule 

Boeing Alert Service Bulletin 737– 

27A1278, Revision 1, dated January 7, 

2010; and Boeing Alert Service Bulletin 

737–27A1277, Revision 2, dated January 

8, 2010; refer to accomplishing certain 

actions as given in certain component 

maintenance manuals (CMMs). This AD 

includes a new Note 1 (and renumbers 

subsequent notes) identifying those 

CMMs as additional sources of 

guidance. The note also clarifies a 

typographical error in Boeing Alert 

Service Bulletin 737–27A1278, Revision 

1, dated January 7, 2010, which referred 

to ‘‘CMM 27–45–12,’’ and should have 

referred to ‘‘CMM 27–45–11’’ as an 

additional source of guidance. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously. 

We also determined that these changes 

will not increase the economic burden 

on any operator or increase the scope of 

the AD. 

Costs of Compliance 

We estimate that this AD affects 1,641 

airplanes of U.S. registry. The following 

table provides the estimated costs for 

U.S. operators to comply with this AD. 

ESTIMATED COSTS

Action 1 Work hours 1 Average labor 

rate per hour Parts Cost per product 1

Number of 

U.S.-registered 

airplanes 

Fleet cost 1

Detailed inspections 2 or 4 ..................... $85 None ...................... $170 or $340, per 

inspection cycle.

1,641 Between $278,970, 

and $557,940 per 

inspection cycle. 

Lubrications ............ 1 or 3 ..................... 85 None ...................... $85 or $255, per lubrication cycle.1,641 Between $139,485, 

and $418,455 per 

lubrication cycle. 

Overhauls ............... 40 ........................... 85 None ...................... $3,400 per overhaul 1,641 $5,579,400 per 

overhaul cycle. 

Modifications (Installations).Between 1 and 3 ... 85 $2,200 .................... Between $2,285 

and $2,455.

1,352 Between 

$3,089,320 and 

$3,319,160. 

1 Depending on airplane configuration. 

The number of work hours, as 

indicated above, is presented as if the 

accomplishment of the actions in this 

AD is to be conducted as new ‘‘stand 

alone’’ actions. However, in actual 

practice, the lubrications, detailed 

inspections, and overhauls are currently 

being done as part of normal airplane 

maintenance. The repair (if necessary) 

can be done coincidentally or in 

combination with the normally 

scheduled HSTA and ballscrew 

overhaul. Therefore, the actual number 

of necessary additional work hours will 

be minimal in many instances. 

Additionally, any costs associated with 

special airplane scheduling will be 

minimal. 

We estimate the following costs to do 

any necessary repairs/replacements that 

would be required based on the results 

of the inspection. We have no way of 

determining the number of aircraft that 

might need these repairs/replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per product 

Remove/replace HSTA ........................................ Between 3 and 8 work hours × $85 per hour = 

between $255 and $680.

$0 Between $255 and $680. 


pmangrum on DSK3VPTVN1PROD with RULES
734 Federal Register / Vol. 77, No. 4 / Friday, January 6, 2012 / Rules and Regulations 

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), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) 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. 

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 airworthiness 

directive (AD): 

2011–27–03 The Boeing Company: 

Amendment 39–16904; Docket No. 

FAA–2008–0415; Directorate Identifier 

2007–NM–256–AD. 

(a) Effective Date 

This AD is effective February 10, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Model 737 airplanes; 

certificated in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27: Flight controls. 

(e) Unsafe Condition 

This AD results from a report of extensive 

corrosion of a ballscrew used in the drive 

mechanism of the horizontal stabilizer trim 

actuator (HSTA). We are issuing this AD to 

prevent an undetected failure of the primary 

load path for the ballscrew in the drive 

mechanism of the HSTA 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. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Inspections, Lubrications, Overhauls, 

Modification(s), and Applicable Corrective 

Actions 

At the applicable compliance time and 

repeat intervals listed in Tables 1 and 2 of 

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

Alert Service Bulletin 737–27A1278, 

Revision 1, dated January 7, 2010; or Boeing 

Alert Service Bulletin 737–27A1277, 

Revision 2, dated January 8, 2010; as 

applicable (depending on airplane 

configuration): Do the inspections, 

lubrications, overhauls, modification(s), and 

applicable corrective actions, by 

accomplishing all the applicable actions 

specified in the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–27A1278, Revision 1, dated January 7, 

2010; or Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 2010; 

as applicable; except as provided by 

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

Note 1: Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 2010; 

and Boeing Alert Service Bulletin 737– 

27A1278, Revision 1, dated January 7, 2010; 

refer to the following component 

maintenance manuals (CMMs) as additional 

sources of guidance for accomplishing the 

applicable specified actions: Boeing CMM 

27–45–11, dated November 1, 2011; Boeing 

CMM 27–45–12, dated November 1, 2011; 

Skytronics CMM 27–40–03, Revision 1, dated 

September 1, 2006; Umbra Cuscinetti CMM 

27–41–01, Revision 5, dated September 27, 

2005; and Linear Motion CMM 27–41–01, 

Revision 8, dated May 21, 2008; as 

applicable. 

Note 2: Boeing Alert Service Bulletin 737– 

27A1278, Revision 1, dated January 7, 2010, 

refers to Umbra Cuscinetti Service Bulletin 

07322–27–01, dated December 21, 2004; 

Linear Motion Service Bulletin 7901708, 

Revision A, and Revision B, both dated July 

26, 2005; Boeing 737 Service Bulletin 27– 

1046, Revision 1, dated April 5, 1974; and 

SKYTRONICS Service Bulletin 93004, dated 

September 1, 2005; as additional sources of 

guidance for accomplishing the applicable 

specified actions. 

Note 3: Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 2010, 

refers to Umbra Cuscinetti Service Bulletin 

07322–27–01, dated December 21, 2004, as 

an additional source of guidance for 

accomplishing the applicable specified 

actions. 

(1) Where paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737–27A1278, 

Revision 1, dated January 7, 2010; or Boeing 

Alert Service Bulletin 737–27A1277, 

Revision 2, dated January 8, 2010; as 

applicable; specifies an initial compliance 

time for accomplishing the initial inspection, 

lubrication, overhaul, or modification, this 

AD requires doing the applicable initial 

action(s) at the later of the times specified in 

paragraphs (g)(1)(i) and (g)(1)(ii) of this AD. 

(i) At the applicable compliance time 

specified in paragraph 1.E, ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737–27A1278, 

Revision 1, dated January 7, 2010; or Boeing 

Alert Service Bulletin 737–27A1277, 

Revision 2, dated January 8, 2010; as 

applicable. 

(ii) Within the applicable compliance time 

specified in paragraph (g)(1)(ii)(A), 

(g)(1)(ii)(B), or (g)(1)(ii)(C) of this AD. 

(A) For the initial detailed inspection and 

lubrication: Within 6 months after the 

effective date of this AD. 

(B) For the initial overhaul: Within 12 

months after the effective date of this AD. 

(C) For the modification(s): Within 24 

months after the effective date of this AD. 

(2) Where Table 2 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–27A1277, Revision 2, dated 

January 8, 2010, specifies a compliance time 

of ‘‘* * * within 25,000 Flight Hours since 

the latest horizontal stabilizer trim actuator 

(HSTA) Overhaul from the date of Revision 

1 of this Service Bulletin * * *,’’ this AD 

requires compliance within 25,000 flight 

hours since the last overhaul of the trim 

actuator of the horizontal stabilizer. 

(h) Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

Actions accomplished before the effective 

date of this AD in accordance with Boeing 

Alert Service Bulletin 737–27A1277, 

Revision 1, dated July 25, 2007; or Boeing 

Alert Service Bulletin 737–27A1278, dated 

May 24, 2007; as applicable; are considered 

acceptable for compliance with the 

corresponding actions specified in this AD. 


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Federal Register / Vol. 77, No. 4 / Friday, January 6, 2012 / Rules and Regulations 735 

(i) Parts Installation 

As of the effective date of this AD, no 

person may install a ballscrew assembly in 

the drive mechanism of the HSTA on any 

airplane, unless it has been inspected and 

modified, as applicable, in accordance with 

paragraph (g) of this AD. 

(j) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Seattle 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. 

In accordance with 14 CFR 39.19, send your 

request to your principal inspector or local 

Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(1) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(2) An AMOC that provides an acceptable 

level of safety may be used for any repair 

required by this AD if it is approved by the 

Boeing Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle ACO 

to make those findings. For a repair method 

to be approved, the repair must meet the 

certification basis of the airplane. 

(k) Related Information 

(1) For more information about this AD, 

contact Kelly McGuckin, Aerospace 

Engineer, Systems and Equipment Branch, 

ANM–130S, FAA, Seattle Aircraft 

Certification Office, 1601 Lind Avenue SW., 

Renton, Washington 98057–3356; phone: 

(425) 917–6490; fax: (425) 917–6590. 

(2) Boeing 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; email me.boecom@boeing.com; Internet 

https://www.myboeingfleet.com. 

(3) For Skytronics service information 

identified in this AD, contact Skytronics Inc., 

(cage 16553), P.O. Box 807, El Segundo, 

California 90245; phone: (310) 322–6284; fax: 

(310) 322–6160; Internet: http:// 

www.skytronicsinc.com. 

(4) For Linear Motion service information 

identified in this AD, contact Linear Motion 

LLC, 628 North Hamilton Street, Saginaw, 

Michigan 48602; phone: (989) 759–8300; 

Internet: http://www.thomsonaerospace.com. 

(5) For Umbra Cuscinetti service 

information identified in this AD, contact 

Umbra Cuscinetti S.p.A., Technical 

Publications Department; Via. Piave 12, 

Foligno (PG) 06034, Italy; phone: +39 (0742) 

348300; fax: +39 (0742) 348277; email: 

tech.pubs@umbracus.com. 

(l) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) of the 

following service information under 5 U.S.C. 

552(a) and 1 CFR part 51: 

(i) Boeing Alert Service Bulletin 737– 

27A1278, Revision 1, dated January 7, 2010. 

(ii) Boeing Alert Service Bulletin 737– 

27A1277, Revision 2, dated January 8, 2010. 

(2) For Boeing 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; email: 

me.boecom@boeing.com; Internet: https:// 

www.myboeingfleet.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. 

(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 an NARA facility, call (202) 741– 

6030, or go to http://www.archives.gov/ 

federal_register/code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Renton, Washington, on 

December 14, 2011. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2011–33351 Filed 1–5–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF HEALTH AND 

HUMAN SERVICES 

Food and Drug Administration 

21 CFR Part 530 

[Docket No. FDA–2008–N–0326] 

New Animal Drugs; Cephalosporin 

Drugs; Extralabel Animal Drug Use; 

Order of Prohibition 

AGENCY: Food and Drug Administration, 

HHS. 

ACTION: Final rule. 

SUMMARY: The Food and Drug 

Administration (FDA, the Agency) is 

issuing an order prohibiting certain 

extralabel uses of cephalosporin 

antimicrobial drugs in certain foodproducing animals. We are issuing this 

order based on evidence that certain 

extralabel uses of these drugs in these 

animals will likely cause an adverse 

event in humans and, therefore, present 

a risk to the public health. 

DATES: This rule becomes effective April 

5, 2012. Submit either electronic or 

written comments on this document by 

March 6, 2012. 

ADDRESSES: You may submit comments, 

identified by Docket No. FDA–2008–N– 

0326, by any of the following methods: 

Electronic Submissions 

Submit electronic comments in the 

following way: 

• Federal eRulemaking Portal: http:// 

www.regulations.gov. Follow the 

instructions for submitting comments. 

Written Submissions 

Submit written submissions in the 

following ways: 

• Fax: (301) 827–6870. 

• Mail/Hand delivery/Courier (For 

paper, disk, or CD–ROM submissions): 

Division of Dockets Management (HFA– 

305), Food and Drug Administration, 

5630 Fishers Lane, rm. 1061, Rockville, 

MD 20852. 

Instructions: All submissions received 

must include the Agency name and 

Docket No. FDA–2008–N–0326 for this 

rulemaking. All comments received may 

be posted without change to http:// 

www.regulations.gov, including any 

personal information provided. For 

additional information on submitting 

comments, see the ‘‘Comments’’ heading 

of the SUPPLEMENTARY INFORMATION

section of this document. 

Docket: For access to the docket to 

read background documents or 

comments received, go to http:// 

www.regulations.gov and insert the 

docket number, found in brackets in the 

heading of this document, into the 

‘‘Search’’ box and follow the prompts 

and/or go to the Division of Dockets 

Management, 5630 Fishers Lane, rm. 

1061, Rockville, MD 20852. 

FOR FURTHER INFORMATION CONTACT: Eric 

Nelson, Center for Veterinary Medicine 

(HFV–230), Food and Drug 

Administration, 7519 Standish Pl., 

Rockville, MD 20855, (240) 276–9201, 

email: eric.nelson@fda.hhs.gov. 

SUPPLEMENTARY INFORMATION: 

I. Background 

A. History 

In the Federal Register of July 3, 2008 

(73 FR 38110), FDA published an order 

prohibiting the extralabel use of 

cephalosporin antimicrobial drugs in 

food-producing animals, with a 60-day 

comment period and a 90-day effective 

date for the final order. The order, 

which was to take effect as a final rule 

on October 1, 2008, would have resulted 

in a change to part 530 (21 CFR part 

530) in § 530.41 to list cephalosporins as 

prohibited from extralabel use in foodproducing animals as provided for in 

§ 530.25(f). 


pmangrum on DSK3VPTVN1PROD with RULES