17632 Federal Register / Vol. 75, No. 66 / Wednesday, April 7, 2010 / Proposed Rules 

TABLE 1—LIST OF AFFECTED SHAFTS

Engine series Affected component Part No. Shaft serial No. 

Compliance 

period 

(flight cycles in 

service after 

December 4, 

2008.) 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ MW0115238 ........................... 750 

Trent 800 ................................ 1–4 HP Compressor Shaft ..... FK32580 ................................ MW0115512 ........................... 750 

Trent 800 ................................ 1–4 HP Compressor Shaft ..... FK32580 ................................ MW0004708 ........................... 2000 

Trent 800 ................................ 1–4 HP Compressor Shaft ..... FK32580 ................................ MW00063868 ......................... 2500 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ DN65507 ................................ 2500 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ DN65158 ................................ 2500 

Trent 800 ................................ 1–4 HP Compressor Shaft ..... FK32580 ................................ MW0125467 ........................... 3500 

Trent 800 ................................ 1–4 HP Compressor Shaft ..... FW11590 ............................... DN65189 ................................ 3500 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ MW0091518 ........................... 3500 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ MW0126365 ........................... 3500 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ DN66422 ................................ 4750 

Trent 800 ................................ 1–8 IP Compressor Shaft ...... FK24100 ................................ MW0203314 ........................... 4750 

Trent 700 ................................ 1–8 IP Compressor Shaft ...... FK22279 ................................ DN63228 ................................ 3250 

Trent 700 ................................ 1–8 IP Compressor Shaft ...... FK26048 ................................ MW0026046 ........................... 4500 

Other FAA AD Provisions 

(f) Alternative Methods of Compliance 

(AMOCs): The Manager, Engine Certification 

Office, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 

Related Information 

(g) Refer to MCAI EASA Airworthiness 

Directive 2009–0021 (Corrected 09 February, 

2009), dated February 6, 2009, for related 

information. 

(h) Contact James Lawrence, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: james.lawrence@faa.gov; 

telephone (781) 238–7176; fax (781) 238– 

7199, for more information about this AD. 

Issued in Burlington, Massachusetts, on 

March 31, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–7830 Filed 4–6–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0342; Directorate 

Identifier 2002–NE–08–AD] 

RIN 2120–AA64 

Airworthiness Directives; BombardierRotax GmbH Type 912 F, 912 S, and 

914 F Series Reciprocating Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede an existing airworthiness 

directive (AD) for certain serial numbers 

(S/Ns) of Bombardier-Rotax GmbH type 

912 F and 914 F series reciprocating 

engines. That AD currently requires 

initial and repetitive visual inspections 

of the engine crankcase for cracks. This 

proposed AD would require those same 

inspections, would add the 912 S series 

to the affected population, add a test 

procedure to determine the engine 

suitability for a special flight permit, 

and would change applicability from 

engine S/N to crankcase S/N. This 

proposed AD results from an increase in 

the affected crankcase population. We 

are proposing this AD to prevent oil loss 

caused by cracks in the engine 

crankcase, which could lead to in-flight 

failure of the engine and forced landing. 

DATES: We must receive any comments 

on this proposed AD by June 7, 2010. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD. 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue, SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

• Fax: (202) 493–2251. 

Contact BRP–Rotax GmbH & Co. KG, 

Welser Strasse 32, A–4623 Gunskirchen, 

Austria, for the service information 

identified in this proposed AD. 

FOR FURTHER INFORMATION CONTACT: 

Richard Woldan, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803–5299; telephone (781) 238–7136; 

fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2010–0342; Directorate Identifier 

2002–NE–08–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact with FAA 

personnel concerning this proposed AD. 

Using the search function of the Web 

site, anyone can find and read the 

comments in any of our dockets, 

including, if provided, the name of the 

individual who sent the comment (or 

signed the comment on behalf of an 

association, business, labor union, etc.). 

You may review the DOT’s complete 

Privacy Act Statement in the Federal 

Register published on April 11, 2000 

(65 FR 19477–78). 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

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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 this AD, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (telephone 

(800) 647–5527) is the same as the Mail 

address provided in the ADDRESSES

section. Comments will be available in 

the AD docket shortly after receipt. 

Discussion 

On August 7, 2002, the FAA issued 

AD 2002–16–26, Amendment 39–12865 

(67 FR 53296, August 15, 2002). That 

AD requires initial visual inspection for 

cracks in the engine crankcase of certain 

S/N engines, within 50 hours time-inservice (TIS) after the effective date of 

that AD, and repetitive visual 

inspections at each 100-hour, annual, or 

progressive inspection, or within 110 

hours TIS since last inspection, 

whichever occurs first. If any cracks are 

found, the engine must be replaced. 

Austro Control GmbH (ACG), which is 

the airworthiness authority for Austria, 

notified the FAA that an unsafe 

condition may exist on certain S/Ns of 

Bombardier-Rotax GmbH type 912 F and 

914 F series reciprocating engines. 

Austro Control GmbH advises that they 

have received reports of about 100 

engine crankcases found cracked in 

service worldwide over the past 10 

years. To date, no engine failures due to 

cracks in the crankcase were reported. 

However, ACG has determined that an 

engine could fail due to oil loss from a 

cracked crankcase. This condition, if not 

corrected, could result in an inflight 

failure of the engine and forced landing. 

Actions Since AD 2002–16–26 Was 

Issued 

Since that AD was issued, we 

determined that the affected crankcase 

population has increased, requiring us 

to expand the applicability of the AD. 

We also learned that Bombardier-Rotax 

has introduced a new design crankcase 

assembly that is not susceptible to the 

cracking issue. The introduction of the 

new crankcase design allows us to limit 

this proposed AD applicability to those 

crankcases with a S/N of 27811 or 

below, and to provide an optional 

terminating action to the repetitive 

inspections required by AD 2002–16– 

26. 

Relevant Service Information 

We have reviewed and approved the 

technical contents of Rotax Aircraft 

Engines Mandatory Service Bulletins 

(MSBs) SB–912–029, Revision 3, dated 

July 11, 2006, and SB–914–018, 

Revision 3, dated July 11, 2006, that 

describe procedures for inspecting the 

crankcase for cracks. The European 

Aviation Safety Agency (EASA), which 

is the Technical Agent for the Member 

States of the European Community, has 

classified these service bulletins as 

mandatory and issued EASA 

Airworthiness Directive 2007–0025, 

dated February 1, 2007 to ensure the 

airworthiness of these BombardierRotax engines in Europe. 

Differences Between the Proposed AD 

and the Service Information 

Rotax Aircraft Engines MSBs specify 

applicability by engine S/N and 

replacement crankcase S/N. This 

proposed AD would specify 

applicability by crankcase S/N only. 

Bilateral Agreement Information 

Bombardier-Rotax GmbH type 912 F, 

912 S, and 914 F series reciprocating 

engines are manufactured in Austria, 

and are type certificated for operation in 

the United States under the provisions 

of section 21.29 of the Federal Aviation 

Regulations (14 CFR 21.29) and the 

applicable bilateral airworthiness 

agreement. Pursuant to this bilateral 

airworthiness agreement, ACG has kept 

the FAA informed of the situation 

described above. The FAA has 

examined the findings of ACG, reviewed 

all available information, and 

determined that AD action is necessary 

for products of this type design that are 

certificated for operation in the United 

States. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to exist or 

develop on other products of this same 

type design. We are proposing this AD, 

which would require initial visual 

inspection for cracks in the engine 

crankcase of certain S/N crankcases, 

within 50 hours time-in-service (TIS) 

after the effective date of this AD, and 

repetitive visual inspections at each 

100-hour, annual, or progressive 

inspection, or within 110 hours TIS 

since last inspection, whichever occurs 

first. If any engine crankcase cracks are 

found, replace the engine before further 

flight. The proposed AD would require 

that you do these actions using the 

service information described 

previously. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 250 products of U.S. 

registry. We also estimate that it would 

take about 3 work-hours per inspection 

and 20 work-hours to replace the 

crankcase to comply with this proposed 

AD. The average labor rate is $85 per 

work-hour. Required parts would cost 

about $6,500 per crankcase. Based on 

these figures and an estimate of one 

crankcase replaced per year, we 

estimate the annual cost of the proposed 

AD on U.S. operators to be $68,100. Our 

cost estimate is exclusive of possible 

warranty coverage. 

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 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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 the proposed 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. Would 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 proposed AD. See the ADDRESSES

section for a location to examine the 

regulatory evaluation. 

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17634 Federal Register / Vol. 75, No. 66 / Wednesday, April 7, 2010 / Proposed Rules 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the Federal Aviation Administration 

proposes to amend 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 

removing Amendment 39–12865 (67 FR 

53296, August 15, 2002) and by adding 

a new airworthiness directive, to read as 

follows: 

Bombardier-Rotax GmbH (formerly Rotax, 

Motorenfabrik): Docket No. FAA–2010– 

0342; Directorate Identifier 2002–NE– 

08–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by June 7, 

2010. 

Affected ADs 

(b) This AD supersedes AD 2002–16–26, 

Amendment 39–12865. 

Applicability 

(c) This airworthiness directive (AD) is 

applicable to Bombardier-Rotax GmbH type 

912 F series, 912 S series, and 914 F series 

reciprocating engines that have a crankcase 

serial-numbered 27811 or lower, installed. 

These engines are installed on, but not 

limited to, Aeromot-Industria Mecanico 

Metalurgica Itda AMT–300; Aquila 

Technische Entwiklugen GmbH AQUILA 

AT01; Diamond Aircraft Industries DA– 

20A1, Diamond Aircraft Industries GmbH 

Models HK36TC, HK36TTC, HK36TTC–ECO, 

and HK36TTS; Iniziative Industriali Italiane 

S.p.A. Sky Arrow 650 series; SCHEIBE– 

Flugzeugnau GmbH SF 25C; and Stemme 

S10–VT aircraft. 

Unsafe Condition 

(d) This AD results from an increase in the 

affected engine crankcase population. We are 

issuing this AD to prevent oil loss caused by 

cracks in the engine crankcase, which could 

lead to in-flight failure of the engine and 

forced landing. 

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. 

Determining the Crankcase Serial Number 

(S/N) 

(f) Determine if your crankcase is affected 

by looking at the S/N in the area indicated 

by XXX, following ‘‘Made in Austria,’’ as 

shown on Figure 2 of this AD. The marking 

is on both crankcase halves. 

Initial Inspection 

(g) Within 50 hours time-in-service (TIS) 

from the effective date of this AD, perform a 

visual inspection as follows: 

(1) Inspect the engine crankcase (item 1, 

Figure 1 of this AD) for cracks, especially in 

the area of cylinder 1 upper side (item 2), 

between cylinder 1 and 3 upper side (item 3), 

cylinder 4 lower-right side (item 4) and 

detailed inspection in the area identified in 

Figure 2 (item 5) of this AD. Information 

concerning this inspection can be found in 

Bombardier-Rotax Mandatory Service 

Bulletins No. SB–912–029, Revision 3, dated 

July 11, 2006 and No. SB–914–018, Revision 

3, dated July 11, 2006. 

BILLING CODE 4910–13–P 

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BILLING CODE 4910–13–C 

(2) Cracks in crankcases of engines with a 

ROTAX cooling air baffle may not be easily 

visible, and oil leaks may be an indication of 

cracks. Visually inspect for oil leaks in areas 

of (item 2, Figure 1 of this AD) and (item 3). 

(3) If you find oil leaks, determine the 

source by either using a borescope or 

removing the object blocking the view such 

as the air baffle or accessory, and perform the 

inspection. 

(4) If the engine crankcase is cracked, 

replace the engine before further flight. 

Repetitive Inspections 

(h) Visually inspect the engine crankcase 

(item 1, Figure 1 of this AD) for cracks at 

each 100-hour, annual, or progressive 

inspection, or within 110 hours TIS since last 

inspection, whichever occurs first, in 

accordance with paragraphs (g)(1) through 

(g)(4) of this AD. 

Alternative Methods of Compliance 

(i) The Manager, Engine Certification 

Office, has the authority to approve 

alternative methods of compliance for this 

AD if requested using the procedures found 

in 14 CFR 39.19. 

Special Flight Permits 

(j) Under 14 CFR part 39.23, we are 

limiting the special flight permits for this AD 

by the following conditions if the crankcase 

is cracked or there is evidence of oil leakage 

from the crankcase: 

(1) Perform a leak check as follows: 

(i) Clean the crankcase surface to remove 

any oil. 

(ii) Warm up the engine to a minimum oil 

temperature of 50 degrees C (120 degrees F). 

Information about warming up the engine 

can be found in the applicable line 

maintenance manual. 

(iii) Accelerate the engine to full throttle 

and stabilize at full throttle speed for a time 

period of 5 to 10 seconds. Information about 

performing a full throttle run can be found 

in the applicable line maintenance manual. 

(iv) Shutdown after running the engine at 

idle only long enough to prevent vapor locks 

in the cooling system and fuel system. 

(v) Inspect the crankcase for evidence of oil 

leakage. Oil wetting is permitted, but oil 

leakage of more than one drip in 3 minutes 

after engine shutdown is not allowed. 

(2) Check the crankcase mean pressure to 

confirm that it is 1.46 pounds-per-square 

inch gage (psig) (0.1 bar) or higher when 

checked at takeoff power to ensure proper 

return of oil from the crankcase to the oil 

tank. Information about checking crankcase 

mean pressure is available in the Lubrication 

System section of the applicable engine 

installation manual. 

(3) A ferry flight is not allowed if oil 

leakage exceeds one drip in 3 minutes or if 

crankcase mean pressure is below 1.46 psig. 

Optional Terminating Action 

(k) Installing a crankcase that has a S/N 

above 27811 terminates the inspection 

requirements of paragraphs (g)(1) through 

(g)(4) and (h) of this AD. 

Related Information 

(l) Contact Richard Woldan, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; telephone (781) 238–7136; fax (781) 


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238–7199, for more information about this 

AD. 

(m) EASA airworthiness directive 2007– 

0025, dated February 1, 2007, also addresses 

the subject of this AD. 

(n) Bombardier-Rotax Mandatory Service 

Bulletins No. SB–912–029, Revision 3, dated 

July 11, 2006 and No. SB–914–018, Revision 

3, dated July 11, 2006, pertain to the subject 

of this AD. Contact BRP–Rotax GmbH & Co. 

KG, Welser Strasse 32, A–4623 Gunskirchen, 

Austria, or go to rotax-aircraft-engines.com 

for a copy of this service information. 

Issued in Burlington, Massachusetts, on 

April 1, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–7831 Filed 4–6–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2010–0085; Airspace 

Docket No. 10–ACE–1] 

Proposed Amendment of Class E 

Airspace; Cherokee, IA 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

amend Class E airspace at Cherokee, IA. 

Decommissioning of the Pilot Rock nondirectional beacon (NDB) at Cherokee 

County Regional Airport has made this 

action necessary for the safety and 

management of Instrument Flight Rules 

(IFR) operations at the airport. 

DATES: Comments must be received on 

or before May 24, 2010. 

ADDRESSES: Send comments on this 

proposal to the U.S. Department of 

Transportation, Docket Operations, 1200 

New Jersey Avenue, SE., West Building, 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. You must 

identify the docket number FAA–2010– 

0085/Airspace Docket No. 10–ACE–1, at 

the beginning of your comments. You 

may also submit comments through the 

Internet at http://www.regulations.gov. 

You may review the public docket 

containing the proposal, any comments 

received, and any final disposition in 

person in the Dockets Office between 9 

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

Friday, except Federal holidays. The 

Docket Office (telephone 1–800–647– 

5527), is on the ground floor of the 

building at the above address. 

FOR FURTHER INFORMATION CONTACT: 

Scott Enander, Central Service Center, 

Operations Support Group, Federal 

Aviation Administration, Southwest 

Region, 2601 Meacham Blvd., Fort 

Worth, TX 76137; telephone: (817) 321– 

7716. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

Interested parties are invited to 

participate in this proposed rulemaking 

by submitting such written data, views, 

or arguments, as they may desire. 

Comments that provide the factual basis 

supporting the views and suggestions 

presented are particularly helpful in 

developing reasoned regulatory 

decisions on the proposal. Comments 

are specifically invited on the overall 

regulatory, aeronautical, economic, 

environmental, and energy-related 

aspects of the proposal. 

Communications should identify both 

docket numbers and be submitted in 

triplicate to the address listed above. 

Commenters wishing the FAA to 

acknowledge receipt of their comments 

on this notice must submit with those 

comments a self-addressed, stamped 

postcard on which the following 

statement is made: ‘‘Comments to 

Docket No. FAA–2010–0085/Airspace 

Docket No. 10–ACE–1.’’ The postcard 

will be date/time stamped and returned 

to the commenter. 

Availability of NPRMs 

An electronic copy of this document 

may be downloaded through the 

Internet at http://www.regulations.gov. 

Recently published rulemaking 

documents can also be accessed through 

the FAA’s Web page at http:// 

www.faa.gov/airports_airtraffic/ 

air_traffic/publications/airspace 

amendments/. 

Additionally, any person may obtain 

a copy of this notice by submitting a 

request to the Federal Aviation 

Administration (FAA), Office of Air 

Traffic Airspace Management, ATA– 

400, 800 Independence Avenue, SW., 

Washington, DC 20591, or by calling 

(202) 267–8783. Communications must 

identify both docket numbers for this 

notice. Persons interested in being 

placed on a mailing list for future 

NPRM’s should contact the FAA’s 

Office of Rulemaking (202) 267–9677, to 

request a copy of Advisory Circular No. 

11–2A, Notice of Proposed Rulemaking 

Distribution System, which describes 

the application procedure. 

The Proposal 

This action proposes to amend Title 

14, Code of Federal Regulations (14 

CFR), Part 71, by amending Class E 

airspace extending upward from 700 

feet above the surface for standard 

instrument approach procedures at 

Cherokee County Regional Airport, 

Cherokee, IA. Airspace reconfiguration 

is necessary due to the 

decommissioning of the Pilot Rock NDB 

and the cancellation of the NDB 

approach. Adjustment to the geographic 

coordinates would be made in 

accordance with the FAAs National 

Aeronautical Charting Office. Controlled 

airspace is needed for the safety and 

management of IFR operations at the 

airport. 

Class E airspace areas are published 

in Paragraph 6005 of FAA Order 

7400.9T, dated August 27, 2009, and 

effective September 15, 2009, which is 

incorporated by reference in 14 CFR 

71.1. The Class E airspace designation 

listed in this document would be 

published subsequently in the Order. 

The FAA has determined that this 

proposed regulation only involves an 

established body of technical 

regulations for which frequent and 

routine amendments are necessary to 

keep them operationally current. It, 

therefore, (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) does not warrant 

preparation of a Regulatory Evaluation 

as the anticipated impact is so minimal. 

Since this is a routine matter that will 

only affect air traffic procedures and air 

navigation, it is certified that this rule, 

when promulgated, will not have a 

significant economic impact on a 

substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

The FAA’s authority to issue rules 

regarding aviation safety is found in 

Title 49 of the U.S. Code. 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. This rulemaking is 

promulgated under the authority 

described in Subtitle VII, Part A, 

Subpart I, Section 40103. Under that 

section, the FAA is charged with 

prescribing regulations to assign the use 

of airspace necessary to ensure the 

safety of aircraft and the efficient use of 

airspace. This regulation is within the 

scope of that authority as it would 

amend controlled airspace at Cherokee 

County Regional Airport, Cherokee, IA. 

List of Subjects in 14 CFR Part 71 

Airspace, Incorporation by reference, 

Navigation (Air). 

WReier-Aviles on DSKGBLS3C1PROD with PROPOSALS