24140 Federal Register / Vol. 63, No. 84 / Friday, May 1, 1998 / Proposed Rules

prior to accumulating 3,200 hours TIS since

last fuel nozzle and support assembly

overhaul.

(iii) Thereafter, inspect for fuel leakage in

accordance with PW ASB A6153, Revision 1,

dated June 8, 1994, at intervals not to exceed

700 hours TIS since last inspection.

(iv) Remove from service No. 7 fuel nozzle

and support assemblies that exhibit evidence

of fuel leakage as described in PW ASB No.

A6153, Revision 1, dated June 8, 1994, and

replace with the improved sealing

configuration nozzle in accordance with

paragraph (a)(2)(i) of this AD, as follows:

(A) Within 25 hours TIS, or 25 cycles in

service (CIS), whichever occurs first, after the

inspection performed in paragraph (a)(1) for

aircraft with only one engine exhibiting No.

7 fuel nozzle and support assembly leakage.

(B) Prior to further flight, on aircraft with

two or more engines exhibiting No. 7 fuel

nozzle and support assembly leakage, remove

and replace at least all but one of the leaking

No. 7 fuel nozzle and support assemblies. If

not replacing all leaking No. 7 fuel nozzle

and support assemblies, the remaining No. 7

fuel nozzle and support assembly that

exhibits leakage shall be removed and

replaced in accordance with paragraph

(a)(1)(iv)(A) of this AD.

(2) At the next accessibility of the diffuser

build group after the effective date of the AD,

but no later than July 31, 1999, accomplish

the following:

(i) Replace the No. 7 fuel nozzle and

support assembly in accordance with

paragraph 1.B.(3) of the Accomplishment

Instructions of PW ASB No. A6311, dated

October 14, 1997.

(ii) Replace the aluminum pressure and

scavenge oil tube fittings with steel fittings in

accordance with PW ASB No. A6170,

Revision 2, dated October 20, 1994.

(iii) Replacement of the following oil tubes

with corresponding oil tubes that incorporate

steel fittings constitutes compliance with

paragraph (b)(2) of this AD:

(A) Outer internal No. 4 and 5 bearing

pressure tube assembly for PW JT8D–200

series engines.

(B) Outer internal main bearing pressure

tube assembly for PW JT8D–200 series

engines.

(C) Main bearing pressure manifold

assembly for PW JT8D–200 series engines.

(D) Front No. 4 1/2 and 6 bearing pressure

tube assembly for JT8D–200 series engines.

(E) No. 4 bearing oil scavenge tube

assembly for all other JT8D engines.

(F) No. 4 bearing oil pressure tube

assembly for all other JT8D engines.

(G) Main bearing pressure manifold

assembly for all other JT8D engines.

(3) Incorporation of the hardware required

by paragraph (a)(2)(i) of this AD constitutes

terminating action for the inspections

required by paragraphs (a)(1) of this AD.

(b) For engines that have incorporated

modifications of the No. 7 fuel nozzle and

support assembly in accordance with PW

ASB No. A6169, Revision 4, dated June 5,

1996, or earlier revisions, and have not

incorporated the replacement of the No. 7

fuel nozzle and support assembly with a fuel

nozzle and support assembly with tack

welded lock tabs in accordance with PW SB

No. 6240, dated January 12, 1996, accomplish

the following.

(1) Borescope inspect, remove, and replace

fuel nozzle and support assemblies for nut

rotation in accordance with methods,

intervals and inspection criteria specified in

PW ASB No. 6310, dated October 13, 1997.

(2) At the next accessibility of the diffuser

build group after the effective date of the AD,

but no later than [Insert 5 years after the

effective date of the AD] , replace the No. 7

fuel nozzle and support assembly with a

welded air nozzle assembly in accordance

with paragraph 1.B.(1), 1.B.(2) and 1.B.(3) of

the Accomplishment Instructions of PW ASB

No. A6311, dated October 14, 1997.

(3) Accomplishment of paragraph (b)(2) of

this AD is terminating action to the

inspections of paragraph (b)(1) of this AD.

(c) For engines that have incorporated the

replacement of the No. 7 fuel nozzle and

support assembly with a fuel nozzle and

support assembly with tack welded lock tabs

in accordance with PW SB No. 6240, dated

January 12, 1996, at the next accessibility of

the diffuser build group after the effective

date of the AD, but no later than [insert 5

years after the effective date of the AD],

replace the No. 7 fuel nozzle and support

assembly with a welded air nozzle assembly

in accordance with paragraph 1.A.(1), 1.A.(2)

and 1.A.(3) of the Accomplishment

Instructions of PW ASB No. A6311, dated

October 14, 1997.

(d) For the purpose of this AD, accessibility

of the diffuser build group is defined as

engine maintenance that entails flange

separation of the diffuser case from the

combustion chamber outer case.

(e) For the purpose of this AD, fuel nozzle

and support assembly overhaul is defined as

disassembly of the fuel nozzle from the

support assembly that entails removal of the

fuel nozzle nut.

(f) An alternative method of compliance or

adjustment of the compliance time that

provides an acceptable level of safety may be

used if approved by the Manager, Engine

Certification Office. Operators shall submit

their requests through an appropriate FAA

Principal Maintenance Inspector, who may

add comments and then send it to the

Manager, Engine Certification Office.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this airworthiness directive,

if any, may be obtained from the Engine

Certification Office.

(g) Special flight permits may be issued in

accordance with sections 21.197 and 21.199

of the Federal Aviation Regulations (14 CFR

21.197 and 21.199) to operate the aircraft to

a location where the requirements of this AD

can be accomplished.

Issued in Burlington, Massachusetts, on

April 23, 1998.

Jay J. Pardee,

Manager, Engine and Propeller Directorate,

Aircraft Certification Service.

[FR Doc. 98–11559 Filed 4–30–98; 8:45 am]

BILLING CODE 4910–13–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Airspace Docket No. 98–AWP–11]

Proposed Modification to Class E

Airspace; Ukiah, CA

AGENCY: Federal Aviation

Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking.

SUMMARY: This notice proposes to

modify the Class E airspace at Ukiah,

CA, by lowering a portion of the base of

controlled airspace from 9,500 feet

mean sea level, (MSL) to 1,200 feet

above ground level (AGL). This action is

due to the proposed establishment of a

new federal airway (V–607) between

Mendocino and Arcata, CA. The

proposed airway, if adopted, will have

a minimum enroute altitude of 9,000

feet MSL. A review of airspace

classification has made this action

necessary in order to achieve

compliance with criteria stated in FAA

Order 7400.2D. The intended effect of

this proposal is to ensure that the Class

E airspace at Ukiah, CA will be of

sufficient size to contain V–607.

DATES: Comments must be received on

or before June 1, 1998.

ADDRESSES: Send comments on the

proposal in triplicate to: Federal

Aviation Administration, Attn:

Manager, Airspace Branch, AWP–520,

Docket No. 98–AWP–11, Air Traffic

Division, P.O. Box 92007, Worldway

Postal Center, Los Angeles, California

90009.

The official docket may be examined

in the Office of the Assistant Chief

Counsel, Western-Pacific Region,

Federal Aviation Administration, Room

6007, 15000 Aviation Boulevard,

Lawndale, California 90261.

An informal docket may also be

examined during normal business hours

at the Office of the Manager, Airspace

Branch, Air Traffic Division at the above

address.

FOR FURTHER INFORMATION CONTACT:

Larry Tonish, Airspace Specialist,

Airspace Branch, AWP–520, Air Traffic

Division, Western-Pacific Region,

Federal Aviation Administration, 15000

Aviation Boulevard, Lawndale, CA

90261, telephone (310) 725–6539.

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.
Federal Register / Vol. 63, No. 84 / Friday, May 1, 1998 / Proposed Rules 24141

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 the

airspace docket number and be

submitted in triplicate to the address

listed above. Individuals wishing the

FAA to acknowledge receipt of their

comments on this notice must submit

with the comments a self-addressed,

stamped postcard on which the

following statement is made:

‘‘Comments to Airspace Docket No. 98–

AWP–11.’’ The postcard will be date/

time stamped and returned to the

individual. All communications

received on or before the specified

closing date for comments will be

considered before taking action on the

proposed rule. The proposal contained

in this notice may be changed in light

of comments received. All comments

submitted will be available for

examination in the Airspace Branch, Air

Traffic Division, at 15000 Aviation

Boulevard, Lawndale, California 90261,

both before and after the closing date for

comments. A report summarizing each

substantive public contact with FAA

personnel concerned with this

rulemaking will be filed in the docket.

Availability of NPRM

Any person may obtain a copy of this

Notice of Proposed Rulemaking (NPRM)

by submitting a request to the Federal

Aviation Administration, Airspace

Branch, P.O. Box 92007, Worldway

Postal Center, Los Angeles, California

90009. Communications must identify

the notice number of this NPRM.

Persons interested in being placed on a

mailing list for future NPRM’s should

also request a copy of Advisory Circular

No. 11A–2A, which describes the

application procedures.

The Proposal

The FAA is considering an

amendment to 14 CFR Part 71 to modify

the Class E airspace area at Ukiah, CA,

by lowering a portion of the base of

controlled airspace from 9,500 feet MSL

to 1,200 feet AGL. This action is due to

the proposed establishment of a new

federal airway (V–607) between

Mendocino and Arcata, CA. The

proposed airway, if adopted, will have

a minimum enroute altitude of 9,000

feet MSL. A review of airspace

classification has made this action

necessary in order to achieve

compliance with criteria stated in FAA

Order 7400.2D. The intended effect of

this proposal is to ensure that the Class

E airspace at Ukiah, CA will be of

sufficient size to contain V–607. Class E

airspace designations for airspace areas

extending upward from 700 feet or more

above the surface of the earth are

published in Paragraph 6006 of FAA

Order 7400.9E dated September 10,

1997, and effective September 16, 1997,

which is incorporated by reference in 14

CFR 71.1. The Class E airspace

designation listed in this document

would be published subsequently in

that 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.

Therefore, this proposed regulation—(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 10034; 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 proposed rule

would not have a significant economic

impact on a substantial number of small

entities under the criteria of the

Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 71

Airspace, Incorporation by reference,

Navigation (air).

The Proposed Amendment

In consideration of the foregoing, the

Federal Aviation Administration

proposes to amend 14 CFR Part 71 as

follows:

PART 71—DESIGNATION OF CLASS A,

CLASS B, CLASS C, CLASS D, AND

CLASS E AIRSPACE AREAS;

AIRWAYS; ROUTES; AND REPORTING

POINTS

1. The authority citation for 14 CFR

Part 71 continues to read as follows:

Authority: 49 U.S.C. 106(g), 40103, 40113,

40120; E.O. 10854, 24 FR 9565, 3 CFR, 1959–

1963 Comp., p. 389.

§ 71.1 [Amended]

2. The incorporation by reference in

14 CFR 71.1 of the Federal Aviation

Administration Order 7400.9E, Airspace

Designations and Reporting Points,

dated September 10, 1997, and effective

September 16, 1997, is amended as

follows:

Paragraph 6005 Subpart E—Class E

Airspace

* * * * *

AWP CA E Ukiah, CA [Revised]

Ukiah Municipal Airport, CA

(Lat. 39°07′34′′N, long. 123°12′03′′W)

Fortuna VORTAC

(Lat. 40°40′17′′N, long. 124°14′04′′W)

Mendocino VORTAC

(Lat. 39°03′12′′N, long. 123°16′27′′W)

Red Bluff VORTAC

(Lat. 40°05′56′′N, long. 122°14′11′′W)

That airspace extending upward from

1,200 feet above the surface within a 17.4

mile radius of the Mendocino VORTAC,

excluding that airspace east of the western

edge of V25 and that airspace bounded by a

line from lat. 39°32′00′′N, long. 123°33′14′′W;

to lat. 39°32′00′′N, long. 123°11′34′′W; to lat.

39°21′37′′N, long. 123°04′54′′W; to lat.

39°19′07′′N, long. 123°07′22′′W, thence

counterclockwise via the 17.4 mile radius of

the Mendocino VORTAC to lat. 39°19′04′′N,

long. 123°25′40′′W; to lat. 39°32′00′′N, long.

123°33′14′′W. That airspace extending

upward from 7,500 feet MSL south of the Red

Bluff VORTAC between the 20.9- and 39.1-

mile arcs of the Red Bluff VORTAC bounded

on the northwest by the northwest edge of V–

199 and on the southeast by the southeast

edge of V–25. That airspace extending

upward from 8,500 feet MSL south of the Red

Bluff VORTAC bounded on the northeast by

a 39.1-mile arc of the Red Bluff VORTAC, on

the southeast by the southeast edge of V–25,

on the south and southwest by the north edge

of V–200 and a 17.4-mile arc of the

Mendocino VORTAC, and on the northwest

by the northwest edge of V–199. That

airspace extending upward from 9,500 feet

MSL bounded on the southeast by the

northwest edge of V–199 to lat. 39°21′37′′N,

long. 123°04′54′′W; to lat. 39°32′00′′N, long.

123°11′34′′W; to lat. 39°32′00′′N, long.

123°20′33′′W, and on the west by the east

edge of V–607, and on the north by a line 7.8

miles south of a parallel to the Red Bluff

VORTAC 291° and Fortuna VORTAC 110°

radii to the 17.4-mile arc of the Red Bluff

VORTAC, thence counterclockwise to the

northwest edge of V–199, and that airspace

bounded on the east by the western edge of

V607 to lat. 39°46′40′′N, long. 123°35′50′′W,

and on the west by the east edge of V–27 to

the 24-mile radius of the Fortuna VORTAC,

thence counterclockwise to the west edge of

V–607. That airspace extending upward from

5,300 feet MSL bounded on the east by the

southwest edge of V–27 and on the west by

the west/southwest edge of V–494.

* * * * *

Issued in Los Angeles, California, on April

21, 1998.

John G. Clancy,

Manager, Air Traffic Division, Western-Pacific

Region.

[FR Doc. 98–11647 Filed 4–30–98; 8:45 am]

BILLING CODE 4910–13–M