172 Federal Register / Vol. 63, No. 2 / Monday, January 5, 1998 / Proposed Rules

in the service bulletin described

previously.

Cost Impact

The FAA estimates that 1 airplane of

U.S. registry would be affected by this

proposed AD, that it would take

approximately 24 work hours per

airplane to accomplish the proposed

actions, and that the average labor rate

is $60 per work hour. Required parts

would cost approximately $6,300 per

airplane. Based on these figures, the cost

impact of the proposed AD on the single

U.S. operator is estimated to be $7,740.

The cost impact figure discussed

above is based on assumptions that no

operator has yet accomplished any of

the proposed requirements of this AD

action, and that no operator would

accomplish those actions in the future if

this AD were not adopted.

Regulatory Impact

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 proposed regulation (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) 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 is contained 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. 106(g), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

Dassault Aviation: Docket 97–NM–193–AD

Applicability: Model Mystere Falcon 900

airplanes; equipped with l’HOTELLIER water

system gauges having part number (P/N)

5250, 5251, 5250–1 or 5251–1; certificated in

any category.

Note 1: This AD applies to each airplane

identified in the preceding applicability

provision, regardless of whether it has been

otherwise 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 request approval for an

alternative method of compliance in

accordance with paragraph (b) of this AD.

The request should include an assessment of

the effect of the modification, alteration, or

repair on the unsafe condition addressed by

this AD; and, if the unsafe condition has not

been eliminated, the request should include

specific proposed actions to address it.

Compliance: Required as indicated, unless

accomplished previously.

To prevent overheating of the water heaters

for the galley or the washbasin, which could

result in damage to the water heater and

nearby electrical wiring, and consequent

smoke in the cabin, accomplish the

following:

(a) Within 7 months or 330 flight hours

after the effective date of this AD, whichever

occurs first: Replace the water heater control

relays with improved relays; add a testing

and monitoring circuit for each contactor;

and install improved electrical bonding of

the potable water tank; in accordance with

Dassault Service Bulletin F900–181 (F900–

38–12), dated December 4, 1996.

(b) 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,

International Branch, ANM–116, FAA,

Transport Airplane Directorate. Operators

shall submit their requests through an

appropriate FAA Principal Maintenance

Inspector, who may add comments and then

send it to the Manager, International Branch,

ANM–116.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the International Branch,

ANM–116.

(c) 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 airplane to

a location where the requirements of this AD

can be accomplished.

Note 3: The subject of this AD is addressed

in French airworthiness directive 96–279–

018(B), dated December 4, 1996.

Issued in Renton, Washington, on

December 29, 1997.

Darrell M. Pederson,

Acting Manager,

Transport Airplane Directorate, Aircraft

Certification Service.

[FR Doc. 98–117 Filed 1–2–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–NM–269–AD]

RIN 2120–AA64

Airworthiness Directives; de Havilland

Model DHC–8–100 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 de Havilland Model DHC–8–100

series airplanes. This proposal would

require a one-time visual inspection to

determine the presence of block seals on

the upper portions of the cabin/baggage

compartment bulkheads, and

installation of a new or serviceable

block seal for any missing block seal.

This proposal is prompted by the

issuance of mandatory continuing

airworthiness information by a foreign

civil airworthiness authority. The

actions specified by the proposed AD

are intended to prevent smoke

contamination of the passenger and

crew cabins, in the event of fire or

smoke in the baggage compartment, due

to a direct smoke path between the

baggage compartment and the cabins.

DATES: Comments must be received by

February 4, 1998.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–103,

Attention: Rules Docket No. 97–NM–

269–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

Bombardier, Inc., Bombardier Regional

Aircraft Division, Garratt Boulevard,
Federal Register / Vol. 63, No. 2 / Monday, January 5, 1998 / Proposed Rules 173

Downsview, Ontario, Canada M3K 1Y5.

This information may be examined at

the FAA, Transport Airplane

Directorate, 1601 Lind Avenue, SW.,

Renton, Washington; or at the FAA,

Engine and Propeller Directorate, New

York Aircraft Certification Office, 10

Fifth Street, Third Floor, Valley Stream,

New York.

FOR FURTHER INFORMATION CONTACT:

Anthony Gallo, Aerospace Engineer,

Systems and Flight Test Branch, ANE–

172, FAA, Engine and Propeller

Directorate, New York Aircraft

Certification Office, 10 Fifth Street,

Third Floor, Valley Stream, New York

11581; Telephone (516) 256–7510; fax

(516) 568–2716.

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 shall

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

summarizing 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 Number 97–NM–269–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, Transport Airplane Directorate,

ANM–103, Attention: Rules Docket No.

97–NM–269–AD, 1601 Lind Avenue,

SW., Renton, Washington 98055–4056.

Discussion

Transport Canada Aviation (TCA),

which is the airworthiness authority for

Canada, notified the FAA that an unsafe

condition may exist on certain de

Havilland Model DHC–8–100 series

airplanes. TCA advises that it received

a report indicating that block seals on

the upper portions of the cabin/baggage

compartment bulkheads had not been

installed during manufacture. The

absence of such block seals would

create a direct smoke path between the

baggage compartment and the passenger

and crew cabins. In the event of fire or

smoke in the baggage compartment,

such a direct smoke path, if not

corrected, could result in smoke

contamination of the passenger and

crew cabins.

Explanation of Relevant Service

Information

De Havilland has issued Service

Bulletin S.B. 8–25–80, Revision ‘A,’

dated July 5, 1993, which describes

procedures for a one-time visual

inspection for the presence of block

seals on the upper portions of the rightand left-hand cabin/baggage

compartment bulkheads, and

installation of a new or serviceable

block seal for any missing block seal.

Accomplishment of the actions

specified in the service bulletin is

intended to adequately address the

identified unsafe condition. TCA

classified this service bulletin as

mandatory and issued Canadian

airworthiness directive CF–92–16, dated

June 26, 1992, in order to assure the

continued airworthiness of these

airplanes in Canada.

FAA’s Conclusions

This airplane model is manufactured

in Canada and is 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,

TCA has kept the FAA informed of the

situation described above. The FAA has

examined the findings of TCA, 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.

Explanation of Requirements of

Proposed Rule

Since an unsafe condition has been

identified that is likely to exist or

develop on other airplanes of the same

type design registered in the United

States, the proposed AD would require

accomplishment of the actions specified

in the service bulletin described

previously.

Cost Impact

The FAA estimates that 20 de

Havilland Model DHC–8–100 series

airplanes of U.S. registry would be

affected by this proposed AD, that it

would take approximately 1 work hour

per airplane to accomplish the proposed

actions, and that the average labor rate

is $60 per work hour. Based on these

figures, the cost impact of the proposed

AD on U.S. operators is estimated to be

$1,200, or $60 per airplane.

The cost impact figure discussed

above is based on assumptions that no

operator has yet accomplished any of

the proposed requirements of this AD

action, and that no operator would

accomplish those actions in the future if

this AD were not adopted.

Regulatory Impact

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 proposed regulation (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) 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 is contained 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:
174 Federal Register / Vol. 63, No. 2 / Monday, January 5, 1998 / Proposed Rules

Authority: 49 U.S.C. 106(g), 40113, 44701.

§ 39.13 [Amended]

2. Section 39.13 is amended by

adding the following new airworthiness

directive:

De Havilland Inc.: Docket 97-NM–

269-AD.

Applicability: Model DHC–8–100 series

airplanes; serial numbers 191, and 225

through 307 inclusive; certificated in any

category.

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 request approval for an

alternative method of compliance in

accordance with paragraph (b) of this AD.

The request should include an assessment of

the effect of the modification, alteration, or

repair on the unsafe condition addressed by

this AD; and, if the unsafe condition has not

been eliminated, the request should include

specific proposed actions to address it.

Compliance: Required as indicated, unless

accomplished previously.

To prevent smoke contamination in the

passenger and crew cabins, in the event of

fire or smoke in the baggage compartment,

due to a direct smoke path between the

baggage compartment and the cabins,

accomplish the following:

(a) Within 4 months after the effective date

of this AD, perform a one-time visual

inspection to determine the presence of block

seals on the upper portions of the right-and

left-hand cabin/baggage compartment

bulkheads; and, prior to further flight, for any

missing block seal, install a new or

serviceable block seal; in accordance with de

Havilland Service Bulletin S.B. 8–25–80,

Revision ‘A,’ dated July 5, 1993.

(b) 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, New York

Aircraft Certification Office (ACO), FAA,

Engine and Propeller Directorate. Operators

shall submit their requests through an

appropriate FAA Principal Maintenance

Inspector, who may add comments and then

send it to the Manager, New York ACO.

Note 2: Information concerning the

existence of approved alternative methods of

compliance with this AD, if any, may be

obtained from the New York ACO.

(c) 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 airplane to

a location where the requirements of this AD

can be accomplished.

Note 3: The subject of this AD is addressed

in Canadian airworthiness directive

CF–92–16, dated June 26, 1992.

Issued in Renton, Washington, on

December 29, 1997.

Darrell M. Pederson,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 98–116 Filed 1–2–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97–NM–105–AD]

RIN 2120–AA64

Airworthiness Directives; McDonnell

Douglas Model DC–9, DC–9–80, and C–

9 (Military) Series Airplanes, and Model

MD–88 Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Notice of proposed rulemaking

(NPRM).

SUMMARY: This document proposes the

supersedure of an existing airworthiness

directive (AD), applicable to certain

McDonnell Douglas Model DC–9, DC–9–

80, and C–9 (military) series airplanes,

and Model MD–88 airplanes, that

currently requires an inspection to

detect chafing on the FIREX pipe

assembly of the number one engine; and

either repair of chafed pipe assemblies

or replacement of the chafed pipe

assemblies with new pipe assemblies;

and modification of the FIREX and the

pneumatic sense pipe assembly clamp

marriage. That AD was prompted by

reports of incidents in which the

pneumatic sense pipe chafed against the

FIREX supply pipe of the number one

engine. This action would revise the

applicability of the existing AD to

include additional airplanes and remove

others. The actions specified by the

proposed AD are intended to prevent

chafing of the FIREX supply pipe,

which could result in a hole in the pipe

and consequently prevent the proper

distribution of the fire extinguishing

agent within the nacelle in the event of

a fire.

DATES: Comments must be received by

February 19, 1998.

ADDRESSES: Submit comments in

triplicate to the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, ANM–114,

Attention: Rules Docket No. 97–NM–

105–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

The Boeing Company, Douglas Products

Division, 3855 Lakewood Boulevard,

Long Beach, California 90846,

Attention: Technical Publications

Business Administration, Dept. C1–L51

(2–60). This information may be

examined at the FAA, Transport

Airplane Directorate, 1601 Lind

Avenue, SW., Renton, Washington; or at

the FAA, Transport Airplane

Directorate, Los Angeles Aircraft

Certification Office, 3960 Paramount

Boulevard, Lakewood, California.

FOR FURTHER INFORMATION CONTACT:

Robert Baitoo, Aerospace Engineer,

Propulsion Branch, ANM–140L, FAA,

Los Angeles Aircraft Certification

Office, 3960 Paramount Boulevard,

Lakewood, California 90712; telephone

(562) 627–5245; fax (562) 627–5210.

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 shall

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

summarizing 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 Number 97–NM–105–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, Transport Airplane Directorate,

ANM–114, Attention: Rules Docket No.

97–NM–105–AD, 1601 Lind Avenue,

SW., Renton, Washington 98055–4056.