19174 Federal Register / Vol. 60, No. 73 / Monday, April 17, 1995 / Proposed Rules

Issued in Kansas City, Missouri, on April

11, 1995.

Dwight A. Young,

Acting Manager, Small Airplane Directorate,

Aircraft Certification Service.

[FR Doc. 95–9343 Filed 4–14–95; 8:45 am]

BILLING CODE 4910–13–U

14 CFR Part 39

[Docket No. 95–CE–21–AD]

Airworthiness Directives; Piper Aircraft

Corporation Model PA–31T2 Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Notice of proposed rulemaking

(NPRM).

SUMMARY: This document proposes to

adopt a new airworthiness directive

(AD) that would apply to certain Piper

Aircraft Corporation (Piper) Model PA–

31T2 airplanes that have a Parker

Hannifin Wheel and Brake Conversion

Kit 199–111 installed in accordance

with Supplemental Type Certificate

(STC) SA599GL. The proposed action

would require rerouting the landing gear

emergency extension air line. Three

incidents of the brake cylinder

contacting the landing gear emergency

extension air line on both wheels

prompted the proposed action. The

actions specified by the proposed AD

are intended to prevent the brake

cylinder from chafing against the

landing gear emergency extension air

line when the gear is in the up and

locked position, which, if not detected

and corrected, could result in damage to

the air line and subsequent loss of

emergency gear extension capability.

DATES: Comments must be received on

or before June 19, 1995.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Central Region,

Office of the Assistant Chief Counsel,

Attention: Rules Docket No. 95–CE–21–

AD, Room 1558, 601 E. 12th Street,

Kansas City, Missouri 64106. Comments

may be inspected at this location

between 8 a.m. and 4 p.m., Monday

through Friday, holidays excepted.

Service information that applies to the

proposed AD may be obtained from the

Parker Hannifan Corporation, Aircraft

Wheel & Brake, 1160 Center Road, P.O.

Box 158, Avon, Ohio 44011; telephone

(216) 937–6211; facsimile (216) 937–

5409. This information also may be

examined at the Rules Docket at the

address above.

FOR FURTHER INFORMATION CONTACT: Mr.

Nick Miller, Aerospace Engineer,

Chicago Aircraft Certification Office,

FAA, 2300 East Devon Avenue, Room

232, Des Plaines, Illinois 60018;

telephone (708) 294–7379; facsimile

(708) 294–7834; or Mr. Charles Perry,

Aerospace Engineer, FAA, Atlanta

Aircraft Certification Office, Campus

Building, 1701 Columbia Avenue, suite

2–160, College Park, Georgia 30337–

2748; telephone (404) 305–7362;

facsimile (404) 305–7348.

SUPPLEMENTARY INFORMATION:

Comments Invited

Interested persons are invited to

participate in the making of the

proposed rule by submitting such

written data, views, or arguments as

they may desire. Communications

should identify the Rules Docket

number and be submitted in triplicate to

the address specified above. All

communications received on or before

the closing date for comments, specified

above, will be considered before taking

action on the proposed rule. The

proposals contained in this notice may

be changed in light of the comments

received.

Comments are specifically invited on

the overall regulatory, economic,

environmental, and energy aspects of

the proposed rule. All comments

submitted will be available, both before

and after the closing date for comments,

in the Rules Docket for examination by

interested persons. A report that

summarizes each FAA- public contact

concerned with the substance of this

proposal will be filed in the Rules

Docket.

Commenters wishing the FAA to

acknowledge receipt of their comments

submitted in response to this notice

must submit a self-addressed, stamped

postcard on which the following

statement is made: ‘‘Comments to

Docket No. 95–CE–21–AD.’’ The

postcard will be date stamped and

returned to the commenter.

Availability of NPRMs

Any person may obtain a copy of this

NPRM by submitting a request to the

FAA, Central Region, Office of the

Assistant Chief Counsel, Attention:

Rules Docket No. 95–CE–21–AD, Room

1558, 601 E. 12th Street, Kansas City,

Missouri 64106.

Discussion

The FAA has received three reports of

the brake cylinder chafing against the

landing gear emergency extension air

line of both wheels on Piper Model PA–

31T2 airplanes that have a Parker

Hannifin Wheel and Brake Conversion

Kit 199–111 installed in accordance

with STC SA599GL. As the brake

linings become worn through regular

usage, the brake cylinder repositions.

Then, when the landing gear is in the up

and locked position, the brake cylinder

chafes against the air line. This

condition, if not detected and corrected,

could result in damage to the landing

gear emergency extension air line and

subsequent loss of emergency gear

extension capability.

Parker Hannifan has issued Service

Bulletin SB7034, dated April 23, 1994,

which specifies procedures for rerouting

the landing gear emergency extension

air line on these Piper Model PA–31T2

airplanes that have a Parker Hannifin

Wheel and Brake Conversion Kit 199–

111 installed in accordance with STC

SA599GL.

After examining the circumstances

and reviewing all available information

related to the incidents described above,

the FAA has determined that AD action

should be taken to prevent the brake

cylinder from chafing against the

landing gear emergency extension air

line when the gear is in the up and

locked position, which, if not detected

and corrected, could result in damage to

the air line and subsequent loss of

emergency gear extension capability.

Since an unsafe condition has been

identified that is likely to exist or

develop in other Piper Model PA–31T2

airplanes of the same type design that

have a Parker Hannifin Wheel and Brake

Conversion Kit 199–111 installed in

accordance with STC SA599GL, the

proposed AD would require rerouting

the landing gear emergency extension

air line. The proposed action would be

accomplished in accordance with the

ACCOMPLISHMENT INSTRUCTIONS

section of Parker Hannifan Service

Bulletin SB7034, dated April 23, 1994.

The FAA estimates that there are 62

Piper Model PA–31T2 airplanes in the

U.S. registry that could incorporate a

Parker Hannifin Wheel and Brake

Conversion Kit 199–111 (in accordance

with STC SA599GL), that it would take

approximately 4 workhours per airplane

to accomplish the proposed action, and

that the average labor rate is

approximately $60 an hour. Parts cost

approximately $20 per airplane. Based

on these figures, the total cost impact of

the proposed AD on U.S. operators

could be as much as $16,120 if all

affected airplanes had the referenced

conversion kit installed.

Parker Hannifan has informed the

FAA that it has distributed 31 kits to

Piper Model PA–31T2 airplane owners/

operators. Based on each of the 31 kits

being incorporated on an affected

airplane, the cost impact of the

proposed AD on U.S. owners and

operators would be reduced 50 percent

from $16,120 to $8,060. The reduction
Federal Register / Vol. 60, No. 73 / Monday, April 17, 1995 / Proposed Rules 19175

results from the difference between the

62 airplanes that are type certificated to

have a Parker Hannifan Wheel and

Brake Conversion Kit 199–111 installed

(in accordance with STC SA599GL) and

the owners/operators of the 31 of the 62

airplanes that have received these kits.

The regulations proposed herein

would not have substantial direct effects

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. Therefore,

in accordance with Executive Order

12612, it is determined that this

proposal would not have sufficient

federalism implications to warrant the

preparation of a Federalism Assessment.

For the reasons discussed above, I

certify that this action (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) if

promulgated, 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. A copy of the draft

regulatory evaluation prepared for this

action has been placed in the Rules

Docket. A copy of it may be obtained by

contacting the Rules Docket at the

location provided under the caption

ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation

safety, Safety.

The Proposed Amendment

Accordingly, pursuant to the

authority delegated to me by the

Administrator, the Federal Aviation

Administration proposes to amend part

39 of the Federal Aviation Regulations

(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. App. 1354(a), 1421

and 1423; 49 U.S.C. 106(g); and 14 CFR

11.89.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding a new AD to read as follows:

Piper Aircraft Corporation: Docket No. 95–

CE–21–AD.

Applicability: Model PA31–T2 airplanes

(serial numbers 31T–8166001 through 31T–

1166062), certificated in any category, that

have a Parker Hannifin Wheel and Brake

Conversion Kit 199–111 installed in

accordance with Supplemental Type

Certificate (STC) SA599GL.

Note 1: This AD applies to each airplane

identified in the preceding applicability

provision, regardless of whether it has been

modified, altered, or repaired in the area

subject to the requirements of this AD. For

airplanes that have been modified, altered, or

repaired so that the performance of the

requirements of this AD is affected, the

owner/operator must use the authority

provided in paragraph (c) of this AD to

request approval from the FAA. This

approval may address either no action, if the

current configuration eliminates the unsafe

condition, or different actions necessary to

address the unsafe condition described in

this AD. Such a request should include an

assessment of the effect of the changed

configuration on the unsafe condition

addressed by this AD. In no case does the

presence of any modification, alteration, or

repair remove any aircraft from the

applicability of this AD.

Compliance: Required within the next 100

hours time-in-service after the effective date

of this AD, unless already accomplished.

To prevent the brake cylinder from chafing

against the landing gear emergency extension

air line when the gear is in the up and locked

position, which, if not detected and

corrected, could result in damage to the air

line and subsequent loss of emergency gear

extension capability, accomplish the

following:

(a) Reroute the landing gear emergency

extension air line in accordance with the

ACCOMPLISHMENT INSTRUCTIONS

section of Parker Hannifan Service Bulletin

SB7034, dated April 23, 1994.

(b) Special flight permits may be issued in

accordance with §§ 21.197 and 21.199 of the

Federal Aviation Regulations (14 CFR 21.197

and 21.199) to operate the airplane to a

location where the requirements of this AD

can be accomplished.

(c) An alternative method of compliance or

adjustment of the compliance time that

provides an equivalent level of safety may be

approved by the Manager, Chicago Aircraft

Certification Office (ACO), FAA, 300 East

Devon Avenue, Room 232, Des Plaines,

Illinois 60018. The request shall be

forwarded through an appropriate FAA

Maintenance Inspector, who may add

comments and then send it to the Manager,

Chicago ACO.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the Chicago ACO.

(d) All persons affected by this directive

may obtain copies of the document referred

to herein upon request to the Parker

Hannifan Corporation, Aircraft Wheel &

Brake, 1160 Center Road, P.O. Box 158,

Avon, Ohio 44011; or may examine this

document at the FAA, Central Region, Office

of the Assistant Chief Counsel, Room 1558,

601 E. 12th Street, Kansas City, Missouri

64106.

Issued in Kansas City, Missouri, on April

11, 1995.

Dwight A. Young,

Acting Manager, Small Airplane Directorate,

Aircraft Certification Service.

[FR Doc. 95–9344 Filed 4–14–95; 8:45 am]

BILLING CODE 4910–13–U

14 CFR Part 39

[Docket No. 94–NM–185–AD]

Airworthiness Directives; British

Aerospace Model BAC 1–11–200 and

–400 Series Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Notice of proposed rulemaking

(NPRM).

SUMMARY: This document proposes the

adoption of a new airworthiness

directive (AD) that is applicable to

certain British Aerospace Model BAC 1–

11–200 and –400 series airplanes. This

proposal would require various

inspections to detect discrepancies of

fuselage frames at certain stations, and

correction of discrepancies; and rework

to limit the maximum differential

operating pressure of the fuselage. This

proposal would also require eventual

modification of fuselage frames at

certain stations, which would terminate

the repetitive inspection requirements.

This proposal is prompted by reports of

fatigue cracking in certain fuselage

frames in the vicinity of the passenger

door at floor level due to fatigue-related

stress. The actions specified by the

proposed AD are intended to prevent

such fatigue-related cracking, which

could result in reduced structural

integrity of the fuselage pressure vessel

and possible decompression of the

pressurized cabin.

DATES: Comments must be received by

May 26, 1995.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–103,

Attention: Rules Docket No. 94–NM–

185–AD, 1601 Lind Avenue, SW.,

Renton, Washington 98055–4056.

Comments may be inspected at this

location between 9:00 a.m. and 3:00

p.m., Monday through Friday, except

Federal holidays.

The service information referenced in

the proposed rule may be obtained from

British Aerospace, Airbus Limited, P.O.

Box 77, Bristol BS99 7AR, England. This

information may be examined at the

FAA, Transport Airplane Directorate,

1601 Lind Avenue, SW., Renton,

Washington.