This section of the FEDERAL REGISTER

contains regulatory documents having general

applicability and legal effect, most of which

are keyed to and codified in the Code of

Federal Regulations, which is published under

50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by

the Superintendent of Documents. Prices of

new books are listed in the first FEDERAL

REGISTER issue of each week.

Rules and Regulations Federal Register

24387

Vol. 63, No. 85

Monday, May 4, 1998

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 96–NM–175–AD; Amendment

39–10509; AD 98–09–28]

RIN 2120–AA64

Airworthiness Directives; Short

Brothers Model SD3–30 and SD3–60

Series Airplanes Equipped With Fire

Fighting Enterprises (U.K.) Ltd. Fire

Extinguishers

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule.

SUMMARY: This amendment adopts a

new airworthiness directive (AD),

applicable to all Shorts Model SD3–30

and SD3–60 series airplanes equipped

with certain fire extinguishers, that

requires replacement of the covers for

fire extinguisher adapter assemblies that

are installed on certain bulkheads with

new covers that swivel to lock the

extinguishers in place; and replacement

of nozzles and triggers on these fire

extinguishers with better fitting nozzles

and stronger triggers. It also requires the

installation of new fire extinguisher

point placards and a revision of the

Airplane Flight Manual to instruct the

flight crew in the use of the new covers

for these adapter assemblies. This

amendment is prompted by reports that

these fire extinguishers are not

discharging properly because they do

not fit correctly with the adapter, and

that triggers on these extinguishers are

failing. The actions specified by this AD

are intended to ensure that, in the event

of fire in the baggage bay, extinguishing

agent is properly distributed within this

area, and portable extinguishers operate

properly; and to prevent injury to crew

and passengers when a portable

extinguisher is discharged.

DATES: Effective June 8, 1998.

The incorporation by reference of

certain publications listed in the

regulations is approved by the Director

of the Federal Register as of June 8,

1998.

ADDRESSES: The service information

referenced in this AD may be obtained

from Short Brothers (USA), Inc., Civil

Technical Operations, P.O. Box 211

(Route 76 East), Bridgeport, West

Virginia 26330. This information may be

examined at the Federal Aviation

Administration (FAA), Transport

Airplane Directorate, Rules Docket,

1601 Lind Avenue, SW., Renton,

Washington; or at the Office of the

Federal Register, 800 North Capitol

Street, NW., suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT:

Norman B. Martenson, Manager,

International Branch, ANM–116, FAA,

Transport Airplane Directorate, 1601

Lind Avenue, SW., Renton, Washington

98055–4056; telephone (425) 227–2110;

fax (425) 227–1149.

SUPPLEMENTARY INFORMATION: A

proposal to amend part 39 of the Federal

Aviation Regulations (14 CFR part 39) to

include an airworthiness directive (AD)

that is applicable to all Shorts Model

SD3–30 and SD3–60 series airplanes

equipped with certain fire extinguishers

was published in the Federal Register

on January 27, 1997 (62 FR 3832). That

action proposed to require replacement

of the covers for fire extinguisher

adapter assemblies that are installed on

certain bulkheads with new covers that

swivel to lock the extinguishers in

place; and replacement of nozzles and

triggers on these fire extinguishers with

better fitting nozzles and stronger

triggers. It also proposed to require the

installation of new fire extinguisher

point placards and a revision of the

Airplane Flight Manual to instruct the

flight crew in the use of the new covers

for these adapter assemblies.

Comments

Interested persons have been afforded

an opportunity to participate in the

making of this amendment. Due

consideration has been given to the

comments received.

One commenter, an organization

representing airline pilots, supports the

proposed AD; however, it requests that

the FAA implement specific training in

the use of critical equipment such as fire

extinguishers, including the actual

equipment used in the aircraft.

The FAA acknowledges the

commenter’s concern. The FAA has

determined that an unsafe condition

exists, and that the actions required by

this AD are adequate in order to ensure

the continued safety of the affected fleet.

While there may be merit to the

commenter’s suggestion, this AD is not

the appropriate context in which to

evaluate that suggestion. Since the

suggested change would alter the

actions currently required by this AD,

additional rulemaking would be

required. The FAA finds that to delay

this action would be inappropriate in

light of the identified unsafe condition.

No change to this final rule is necessary.

The manufacturer of the affected

airplanes notes that replacement of the

discharge head assembly in accordance

with Fire Fighting Enterprises (U.K.)

Ltd. Service Bulletin 26–107, Revision

1, dated November 2, 1992, includes

replacement of the trigger as also

required by the company’s Service

Bulletin 26–108, dated September 1992.

Both service bulletins are cited as the

appropriate sources of service

information in paragraph (c) of the

proposed AD. The commenter requests

that this information be provided in the

AD so that operators would not rework

the fire extinguisher head per Service

Bulletin 26–107 (which would require

the installation of a new trigger in

accordance with Service Bulletin 26–

108), only to discover that both actions

could be accomplished by replacing the

discharge head.

The FAA concurs that some confusion

could result with regard to the current

wording contained in paragraph (c)(1) of

this final rule. Therefore, the FAA has

changed paragraph (c)(1) to read,

‘‘Install a chamfered nozzle on the

discharge head assembly of each fire

extinguisher and add a new trigger by

replacing * * *.’’ That change, together

with the clarification contained in the

service bulletin, should preclude any

confusion in that regard.

The same commenter requests that an

inspection procedure be provided in

order to determine whether the trigger

has actually been replaced in

accordance with Service Bulletin 26–

108. The commenter states that

paragraph 3.A.(3)(h) of Service Bulletin

26–107, Revision 1, requires that the fire

extinguisher trigger be marked with part

number BA22988–3 after rework of the

nozzle chamfer. The commenter further
24388 Federal Register / Vol. 63, No. 85 / Monday, May 4, 1998 /Rules and Regulations

asserts that, since effectivity of Service

Bulletin 26–108 does not include

discharge head part number BA22988–

3, maintenance personnel may assume

that, following accomplishment of

Service Bulletin 26–107 (and re-marking

of the part to BA22988–3), replacement

of the trigger in accordance with Service

Bulletin 26–108 is not necessary.

The FAA does not concur that an

inspection should be added to this AD.

Contrary to the commenter’s assertion,

Service Bulletin 26–107 requires that

the reworked discharge head, not the

trigger itself, be marked with part

number BA22988–3. In any event, the

AD requires replacement of the trigger

with the stronger trigger, either through

accomplishment of Service Bulletin 26–

107, Revision 1, or 26–108, regardless of

the part number marking on the fire

extinguisher discharge head. However,

replacement of the trigger is required

only if such replacement has not been

accomplished prior to the effective date

of the AD. Investigation of airplane

maintenance records may be necessary

to confirm whether the stronger trigger

has been installed. If there are no

records showing that it has already been

installed, the stronger trigger must be

installed in accordance with this AD.

The commenter also provided

corrected information concerning the

address from which the referenced

service bulletins may be obtained and

the cost of parts needed for compliance.

The correct address is shown above

under the heading ADDRESSES, and the

cost impact information presented

below reflects the corrected information

concerning the cost of parts. The cost

impact information also reflects changes

that have occurred in the number of

affected U.S.-registered airplanes since

the notice of proposed rulemaking was

published.

Conclusion

After careful review of the available

data, including the comments noted

above, the FAA has determined that air

safety and the public interest require the

adoption of the rule with the changes

previously described. The FAA has

determined that these changes will

neither significantly increase the

economic burden on any operator nor

increase the scope of the AD.

Cost Impact

The FAA estimates that 33 Model

SD3–30 series airplanes of U.S. registry

will be affected by this AD. For these

airplanes, it will take approximately 9

work hours per airplane to accomplish

the required actions on airplanes with

only a forward baggage bay, and 14

work hours per airplane to accomplish

the required actions on airplanes with

forward and aft baggage bays. The

average labor rate is $60 per work hour.

Required parts will cost approximately

$735 per airplane. Based on these

figures, the cost impact of the AD on

U.S. operators of Model SD3–30 series

airplanes is estimated to be between

$42,075 and $51,975, or between $1,275

and $1,575 per airplane.

The FAA estimates that 52 Model

SD3–60 series airplanes of U.S. registry

will be affected by this AD. For these

airplanes, it will take approximately 12

work hours per airplane to accomplish

the required actions, at an average labor

rate of $60 per work hour. Required

parts will cost approximately $776 per

airplane. Based on these figures, the cost

impact of the AD on U.S. operators of

Model SD3–60 series airplanes is

estimated to be $77,792, or $1,496 per

airplane.

The cost impact figures discussed

above are based on assumptions that no

operator has yet accomplished any of

the 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 adopted herein will

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 final rule does

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)

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 final evaluation has

been prepared for this action and it is

contained in the Rules Docket. A copy

of it may be obtained from the Rules

Docket at the location provided under

the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation

safety, Incorporation by reference,

Safety.

Adoption of the Amendment

Accordingly, pursuant to the

authority delegated to me by the

Administrator, the Federal Aviation

Administration amends 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:

98–09–28 Short Brothers, PLC: Amendment

39–10509. Docket 96–NM–175–AD.

Applicability: Model SD3–30 and SD3–60

series airplanes equipped with fire

extinguishers manufactured by Fire Fighting

Enterprises (U.K.) Ltd.; 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 (d) 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 ensure that, in the event of fire,

extinguishing agent is properly distributed

within the baggage bays and portable

extinguishers operate properly; and to

prevent injury to crew and passengers,

accomplish the following:

(a) Within 6 months after the effective date

of this AD, install a new cover on each fire

extinguisher adapter assembly on bulkheads

between the passenger cabin and aft and/or

forward baggage bay, in accordance with

Shorts Service Bulletin SD330–26–14, dated

September 1994 (for Shorts Model SD3–30

series airplanes), or Shorts Service Bulletin

SD360–26–11, dated July 1994 (for Shorts

Model SD3–60 series airplanes), as

applicable.

(b) Prior to further flight after

accomplishing the actions required by

paragraph (a) of this AD, accomplish both

paragraphs (b)(1) and (b)(2) of this AD:

(1) Install new fire extinguisher point

placards, in accordance with Shorts Service

Bulletin SD330–26–14, dated September

1994 (for Shorts Model SD3–30 series

airplanes), or Shorts Service Bulletin SD360–

26–11, dated July 1994 (for Shorts Model

SD3–60 series airplanes), as applicable. And
Federal Register / Vol. 63, No. 85 / Monday, May 4, 1998 /Rules and Regulations 24389

(2) Revise the Limitations Section of the

FAA-approved Airplane Flight Manual

(AFM), in accordance with Note 1 of

Paragraph 1.C. of Shorts Service Bulletin

SD330–26–14, dated September 1994 (for

Shorts Model SD3–30 series airplanes), or

Shorts Service Bulletin SD360–26–11, dated

July 1994 (for Shorts Model SD3–60 series

airplanes), as applicable.

(c) For airplanes equipped with fire

extinguishers having part number (P/N)

BA51012SR–3 or BA51012SR: Within 6

months after the effective date of this AD,

accomplish either paragraph (c)(1) or (c)(2) of

this AD:

(1) Install a chamfered nozzle on the

discharge head assembly of each fire

extinguisher and add a new trigger by

replacing the discharge head assembly with

a new discharge head assembly, having P/N

BA22988–3, in accordance with Fire Fighting

Enterprises (U.K.) Ltd. Service Bulletin 26–

107, Revision 1, dated November 2, 1992.

Or

(2) Replace the trigger on the discharge

head assembly of each fire extinguisher with

a new trigger, in accordance with Fire

Fighting Enterprises (U.K.) Ltd. Service

Bulletin 26–108, dated September 1992. After

replacement, install a chamfered nozzle on

the discharge head assembly of each fire

extinguisher by reworking the discharge head

assembly in accordance with Fire Fighting

Enterprises (U.K.) Ltd. Service Bulletin 26–

107, Revision 1, dated November 2, 1992.

(d) 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.

(e) 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.

(f) The actions shall be done in accordance

with Short Brothers Shorts Service Bulletin

SD330–26–14, dated September 1994; Short

Brothers Shorts Service Bulletin SD360–26–

11, dated July 1994; Fire Fighting Enterprises

(U.K.) Ltd. Service Bulletin 26–107, Revision

1, dated November 2, 1992; and Fire Fighting

Enterprises (U.K.) Ltd. Service Bulletin 26–

108, dated September 1992; as applicable.

This incorporation by reference was

approved by the Director of the Federal

Register in accordance with 5 U.S.C. 552(a)

and 1 CFR part 51. Copies may be obtained

from Short Brothers (USA), Inc., Civil

Technical Operations, P.O. Box 211 (Route

76 East), Bridgeport, West Virginia 26330.

Copies may be inspected at the FAA,

Transport Airplane Directorate, 1601 Lind

Avenue, SW., Renton, Washington; or at the

Office of the Federal Register, 800 North

Capitol Street, NW., suite 700, Washington,

DC.

(g) This amendment becomes effective on

June 8, 1998.

Issued in Renton, Washington, on April 22,

1998.

Gary L. Killion,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 98–11302 Filed 5–1–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98–NM–05–AD; Amendment

39–10458]

RIN 2120–AA64

Airworthiness Directives; Bombardier

Model CL–215–1A10 and CL–215–6B11

Series Airplanes; Correction

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Direct final rule; correction.

SUMMARY: This document corrects an

error that appeared in amendment 39–

10458 that was published in the Federal

Register on April 10, 1998 (63 FR

17672). The error resulted in the

inadvertent omission of the

applicability statement of the

amendment. This amendment is

applicable to certain Bombardier Model

CL–215–1A10 and CL–215–6B11 series

airplanes. This amendment requires

repetitive inspections to detect cracking

on certain wing to fuselage frameangles, and repair, if necessary.

DATES: Effective July 9, 1998.

The incorporation by reference of

certain publications listed in the

regulations was previously approved by

the Director of the Federal Register as

of July 9, 1998 (63 FR 17672, April 10,

1998).

FOR FURTHER INFORMATION CONTACT:

Serge Napoleon, Aerospace Engineer,

Airframe and Propulsion Branch, ANE–

171, FAA, Engine and Propeller

Directorate, New York Aircraft

Certification Office, 10 Fifth Street,

Third Floor, Valley Stream, New York

11581; telephone (516) 256–7512; fax

(516) 568–2716.

SUPPLEMENTARY INFORMATION:

Amendment 39–10458, applicable to

certain Bombardier Model CL–215–

1A10 and CL–215–6B11 series

airplanes, was published in the Federal

Register on April 10, 1998 (63 FR

17672). That amendment requires

repetitive inspections to detect cracking

on certain wing to fuselage frameangles, and repair, if necessary.

As published, the applicability

statement of the amendment was

omitted inadvertently. The FAA has

determined that this omission must be

corrected. In all other respects, the

original document is correct.

Since no other part of the regulatory

information has been changed, the

direct final rule is not being

republished.

The effective date of this amendment

remains July 9, 1998.

§ 39.13 [Corrected]

1. On page 17674, in the first column,

the airworthiness directive, amendment

39–10458, is corrected by adding the

applicability statement preceding Note 1

to read as follows:

* * * * *

Applicability: Model CL–215–1A10 and

CL–215–6B11 series airplanes, serial

numbers 1001 through 1125 inclusive,

certificated in any category.

* * * * *

Issued in Renton, Washington, on April 24,

1998.

Gary L. Killion,

Acting Manager, Transport Airplane

Directorate, Aircraft Certification Service.

[FR Doc. 98–11560 Filed 5–1–98; 8:45 am]

BILLING CODE 4910–13–U

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 71

[Airspace Docket No. 97–ANM–24]

Amendment of Class D Airspace; Twin

Falls, ID

AGENCY: Federal Aviation

Administration (FAA), DOT.

ACTION: Direct final rule; confirmation of

effective date.

SUMMARY: This document confirms the

effective date of the direct final rule

published on February 25, 1998 (63 FR

9409) which changed the name of the

airport in the Twin Fall, ID, Class D

airspace legal description. During a

review of Idaho airspace, it was

discovered that the airport name needed

updating because it was changed from

Twin Falls-Sun Valley Regional, Joslin

Field to Joslin Field-Magic Valley

Regional. This rule also updated the

coordinates for the airport.

EFFECTIVE DATE: The direct final rule

published at 63 FR 9409 is effective

0910 UTC, May 26, 1998.

FOR FURTHER INFORMATION CONTACT: