30296 Federal Register / Vol. 66, No. 109 / Wednesday, June 6, 2001 / Rules and Regulations

to about $9.00 per pound and $7.00 per

pound, respectively, for Native and

Scotch spearmint oils despite the

Committee’s efforts to balance available

supplies with demand.

Without any regulations in effect, the

Committee believes the industry would

return to the pattern of cyclical prices of

prior years, as well as suffer the

potentially price depressing

consequence that a release of over a

million pounds of spearmint oil reserves

would have on the market. Thus,

according to the Committee, levels for

the salable quantities and allotment

percentages either higher or lower than

those recommended would not achieve

the intended goals of market and price

stability.

As stated earlier, annual salable

quantities and allotment percentages

have been issued for both classes of

spearmint oil since the order’s

inception. Reporting and recordkeeping

requirements have remained the same

for each year of regulation. These

requirements have been approved by the

Office of Management and Budget under

OMB Control No. 0581–0065.

Accordingly, this action does not

impose any additional reporting or

recordkeeping requirements on either

small or large spearmint oil producers

and handlers. All reports and forms

associated with this program are

reviewed periodically in order to avoid

unnecessary and duplicative

information collection by industry and

public sector agencies. The Department

has not identified any relevant Federal

rules that duplicate, overlap, or conflict

with this final rule.

Finally, the Committee’s meeting was

widely publicized throughout the

spearmint oil industry and all interested

persons were invited to attend and

participate on all issues. Like all

Committee meetings, the October 11,

2000, meeting was a public meeting and

all entities, both large and small, were

able to express views on this issue.

Interested persons were also invited to

submit information on the regulatory

and informational impacts of this action

on small businesses.

A proposed rule was published in the

Federal Register (66 FR 20615) on April

24, 2001. A 15-day comment period was

provided to allow interested persons the

opportunity to respond to the proposal,

including any regulatory and

informational impacts of this action on

small businesses. A copy of the

proposed rule was both faxed and

mailed to the Committee office, which

in turn notified Committee members

and spearmint oil producers and

handlers of the proposed action. A copy

of the proposal was also made available

on the Internet by the U.S. Government

Printing Office. No comments were

received.

A small business guide on complying

with fruit, vegetable, and specialty crop

marketing agreements and orders may

be viewed at:

http://www.ams.usda.gov/fv/moab.html.

Any questions about the compliance

guide should be sent to Jay Guerber at

the previously mentioned address in the

FOR FURTHER INFORMATION CONTACT

section.

It is further found that good cause

exists for not postponing the effective

date of this rule until 30 days after

publication in the Federal Register (5

U.S.C. 553) because the 2001–2002

marketing year begins on June 1, 2001.

Further, handlers are aware of this rule,

which was recommended at a public

meeting. Also, a 15-day comment period

was provided for in the proposed rule

and no comments were received.

After consideration of all relevant

matter presented, including the

information and recommendation

submitted by the Committee and other

available information, it is hereby found

that this rule, as hereinafter set forth,

will tend to effectuate the declared

policy of the Act.

List of Subjects in 7 CFR Part 985

Marketing agreements, Oils and fats,

Reporting and recordkeeping

requirements, Spearmint oil.

For the reasons set forth in the

preamble, 7 CFR Part 985 is amended as

follows:

PART 985—MARKETING ORDER

REGULATING THE HANDLING OF

SPEARMINT OIL PRODUCED IN THE

FAR WEST

1. The authority citation for 7 CFR

Part 985 continues to read as follows:

Authority: 7 U.S.C. 601–674.

2. A new § 985.220 is added to read

as follows:

[Note: This section will not appear in the

Code of Federal Regulations.]

§ 985.220 Salable quantities and allotment

percentages—2001–2002 marketing year.

The salable quantity and allotment

percentage for each class of spearmint

oil during the marketing year beginning

on June 1, 2001, shall be as follows:

(a) Class 1 (Scotch) oil—a salable

quantity of 900,208 pounds and an

allotment percentage of 48 percent.

(b) Class 3 (Native) oil—a salable

quantity of 938,944 pounds and an

allotment percentage of 45 percent.

Dated: June 1, 2001.

Kenneth C. Clayton,

Acting Administrator, Agricultural Marketing

Service.

[FR Doc. 01–14236 Filed 6–1–01; 2:02 pm]

BILLING CODE 3410–02–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2000–CE–25–AD; Amendment

39–12244; AD 2001–11–03]

RIN 2120–AA64

Airworthiness Directives; Raytheon

Aircraft Company Beech Models F33A,

A36, B36TC, 58/58A, C90A, B200, and

1900D Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule.

SUMMARY: This amendment adopts a

new airworthiness directive (AD) that

applies to certain Raytheon Aircraft

Company (Raytheon) Beech Models

F33A, A36, B36TC, 58/58A, C90A,

B200, and 1900D airplanes equipped

with a KA–33 cooling blower. This AD

requires you to incorporate certain

electrical parts to protect cooling

blowers. This AD is the result of several

reports of circuit breakers failing to

protect cooling blowers on the affected

airplanes. The actions specified by this

AD are intended to protect the blower

motor circuit and reduce the possibility

of emission of smoke or a burning odor

into the cockpit or passenger

compartment as a result of a failed or

seized blower motor.

DATES: This AD becomes effective on

July 20, 2001.

The Director of the Federal Register

approved the incorporation by reference

of certain publications listed in the

regulations as of July 20, 2001.

ADDRESSES: You may get the service

information referenced in this AD from

the Raytheon Aircraft Company, P.O.

Box 85, Wichita, Kansas 67201–0085;

telephone: (800) 429–5372 or (316) 676–

3140. You may examine this

information at the Federal Aviation

Administration (FAA), Central Region,

Office of the Regional Counsel,

Attention: Rules Docket No. 2000–CE–

25–AD, 901 Locust, Room 506, Kansas

City, Missouri 64106; or at the Office of

the Federal Register, 800 North Capitol

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

FOR FURTHER INFORMATION CONTACT:

Todd Dixon, Aerospace Engineer, FAA,

Federal Register / Vol. 66, No. 109 / Wednesday, June 6, 2001 / Rules and Regulations 30297

Wichita Aircraft Certification Office,

1801 Airport Road, Mid-Continent

Airport, Wichita, Kansas 67209;

telephone: (316) 946–4152; facsimile:

(316) 946–4407.

SUPPLEMENTARY INFORMATION:

Discussion

What Events Have Caused This AD?

The FAA has received several reports

of blower motors failing, seizing,

smoking, and producing a burning odor

that enters the cabin and passenger

compartment. These events are the

result of the blower motor having circuit

protection of more than 1 ampere. This

amount of circuit protection does not

prevent the blower motor from smoking

and creating a burning odor should it

fail or seize.

What Are the Consequences if the

Condition Is Not Corrected?

This condition could result in smoke

or burning odor entering the cockpit or

passenger compartments.

Has FAA Taken any Action to This

Point?

We issued a proposal to amend part

39 of the Federal Aviation Regulations

(14 CFR part 39) to include an AD that

would apply to certain Raytheon Beech

Models F33A, A36, B36TC, 58/58A,

C90A, B200, and 1900D airplanes

equipped with a KA–33 cooling blower.

This proposal was published in the

Federal Register as a notice of proposed

rulemaking (NPRM) on February 14,

2001 (66 FR 10226). The NPRM

proposed to require you to incorporate

certain electrical parts to protect cooling

blowers.

Was the Public Invited To Comment?

Interested persons were afforded an

opportunity to participate in the making

of this amendment. No comments were

received on the proposed rule or the

FAA’s determination of the cost to the

public.

FAA’s Determination and Provisions of

This AD

What Is FAA’s Final Determination on

This Issue?

After careful review of all available

information related to the subject

presented above, we have determined

that air safety and the public interest

require the adoption of the rule as

proposed except for minor editorial

corrections. We determined that these

minor corrections:

—Will not change the meaning of the

AD; and

—will not add any additional burden

upon the public than was already

proposed.

What Are the Differences Between the

Service Bulletin and This AD?

Raytheon specifies in the service

information that you are to do this

modification at the next scheduled

inspection or before 6 months or 600

hours time-in-service, whichever comes

first. We require you do the

modification within the next 6 calendar

months or 600 hours time-in-service

(TIS), whichever comes first, after the

effective date of this AD. We cannot

enforce a compliance time of ‘‘at the

next scheduled inspection.’’ We believe

that 6 calendar months or 600 hours TIS

will give the owners/operators of the

affected airplanes enough time to have

the required actions done without

compromising the safety of the

airplanes. This will allow the owners/

operators to work this modification into

regularly scheduled maintenance.

Cost Impact

How Many Airplanes Does This AD

Impact?

We estimate that this AD affects 3,403

airplanes in the U.S. registry.

Models Number of U.S.

Airplanes Affected

F33A, A36, B36TC, and

58/58A ......................... 2,385

C90A ............................... 275

B200 ............................... 343

1900D ............................. 400

What Is the Cost Impact of This AD on

Owners/Operators of the Affected

Airplanes?

We estimate the following costs to

accomplish the inspection for Beech

Models F33A, A36, B36TC, and 58/58A

airplanes:

Labor cost Parts cost Total cost per airplane Total cost on U.S. operators

1 workhour × $60 per hour = $60 .......... No parts needed for inspection. ............ $60 2,385 × $60 = $143,100.

For Beech Models F33A, A36, B36TC,

and 58/58A airplanes, we estimate the

following costs to do any necessary

circuit breaker installation that will be

required based on the results of the

inspection. We have no way of knowing

the number of airplanes that will need

the circuit breaker installation:

Labor cost Parts

cost

Total cost per circuit

breaker installation

1 workhour × $60 per hour = $60 to do each circuit breaker installation ............................................................... $33 $60 + $33 = $93.

We estimate the following costs to do the installation for Beech Model C90A airplanes. We have no way of knowing

how many airplanes will need the in-line fuse holder and 1 ampere slow-blow fuse installation:

Labor cost Parts

cost

Total cost per in-line

fuse holder and 1-ampere fuse installation

1 workhour × $60 per hour = $60 to do each in-line fuse holder and 1-ampere slow-blow fuse installation ........ $12 $60 + $12 = $72.

We estimate the following costs to do the installation for Beech Models B200 airplanes. We have no way of knowing

how many airplanes may need the in-line fuse holder and 1 ampere slow-blow fuse installation:

30298 Federal Register / Vol. 66, No. 109 / Wednesday, June 6, 2001 / Rules and Regulations

Labor cost Parts

cost

Total cost per in-line

fuse holder, 1-ampere

fuse installation, and

junction box re-work

2 workhours × $60 per hour = $120 ........................................................................................................................ $19 $120 + $19 = $139.

We estimate the following costs to do the installation for Beech Models 1900D airplanes. We have no way of

knowing the number of airplanes that will need the in-line fuse holder and 1 ampere slow-blow fuse installation:

Labor cost Parts

cost

Total cost per in-line

fuse holder and 1-ampere fuse installation

1 workhour × $60 per hour = $60 ........................................................................................................................... $12 $60 + $12 = $72.

The manufacturer will allow warranty

credit for labor and parts to the extent

noted in the service bulletin.

Regulatory Impact

Does this AD Impact Various Entities?

The regulations adopted herein will

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. Therefore, it is

determined that this final rule does not

have federalism implications under

Executive Order 13132.

Does This AD Involve a Significant Rule

or Regulatory Action?

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 copy of the final

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, Incorporation by reference,

Safety.

Adoption of the Amendment

Accordingly, under 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. FAA amends § 39.13 by adding a

new AD to read as follows:

2001–11–03 Raytheon Aircraft Company:

Amendment 39–12244; Docket No.

2000–CE–25–AD.

(a) What airplanes are affected by this AD?

This AD affects the following airplanes that

are certificated in any category:

Model Serial Nos.

Beech F33A ........................................................ CE–1050 through CE–1791.

Beech A36 ........................................................... E–2205 through E–3217.

Beech B36TC ...................................................... EA–443 through EA–628.

Beech 58/58A ...................................................... TH–1436 through TH–1883.

Beech C90A ........................................................ Do not have the EFIS–84 System Installation equipped with factory installed KLN–88 LORAN:

LJ–1278 LJ–1288, LJ–1293, LJ–1299, LJ–1314, and LJ–1315.

Beech C90A ........................................................ Equipped with Collins EFIS–84 System: LJ–1306, LJ–1316, LJ–1318, LJ–1320 through LJ1334, LJ–1340 through LJ–1592.

Beech B200 ......................................................... BB–1314, BB–1449 through BB–1692 equipped with Collins EFIS–84 System.

1900D .................................................................. UE–1 through UE–401.

(b) Who must comply with this AD? Anyone who wishes to operate any of the above airplanes must comply with this AD.

(c) What problem does this AD address? The actions specified by this AD are intended to protect the blower motor circuit and

reduce the possibility of the emission of smoke or a burning odor in the cockpit or passenger compartment as a result of a failed

or seized blower motor.

(d) What actions must I accomplish to address this problem for Beech Models F33A, A36, B36TC, and 58/58A airplanes? To

address this problem, you must accomplish the following actions:

Actions Compliance Procedures

(1) Inspect for an installed and properly working KA–33 cooling blower, unless already accomplished.Within the next 600 hours time-in-service

(TIS) after July 20, 2001 (the effective date

of this AD) or within the next 6 calendar

months after July 20, 2001 (the effective

date of this AD), whichever comes first.

Do this action following Raytheon Mandatory

Service Bulletin SB 34–3267, Issued:

March, 1999.

Federal Register / Vol. 66, No. 109 / Wednesday, June 6, 2001 / Rules and Regulations 30299

Actions Compliance Procedures

(2) If the aircraft has a KA–33 cooling blower,

install a 1 ampere circuit breaker, part number (P/N) 7277–2–1, in place of the factory

installed 3 ampere/5 ampere circuit breakers.

Before further flight after the inspection required in paragraph (d)(1) of this AD.Do this action following Raytheon Mandatory

Service Bulletin SB 34–3267, Issued:

March, 1999.

(3) Do not install, on any affected airplane, any

3 ampere/5 ampere circuit breakers to protect the KA–33 Cooling Blower.

As of July 20, 2001 (the effective date of this

AD).

Not Applicable.

(e) What actions must I accomplish to address this problem for Beech Model C90A airplanes? To address this problem, you

must accomplish the following actions:

Actions Compliance Procedures

(1) Install the in-line fuse holder, P/N HHJ–A,

and install the 1-ampere slow-blow fuse, P/N

MDL1, in the fuse holder, unless already accomplished.

Within the next 600 hours TIS after July 20,

2001 (the effective date of this AD) or within

the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Do these actions following Raytheon Mandatory Service Bulletin SB 34–3269, Revision

1, Revised: October, 2000.

(2) Doing this action following Raytheon Mandatory Service Bulletin SB 34–3269, Issued:

January 2000, is considered an alternative

method of compliance with this AD.

Within the next 600 hours TIS after July 20,

2001 (the effective date of this AD) or within

the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Use the procedures in Raytheon Mandatory

Service Bulletin SB 34–3269, Issued: January 2000, if you use this alternative method

of compliance.

(f) What actions must I accomplish to address this problem for Beech Model B200 airplanes? To address this problem, you must

accomplish the following actions:

Actions Compliance Procedures

(1) Install the in-line fuse holder, P/N HHJ–A,

and install the 1-ampere slow-blow fuse, P/N

MDL1, in the fuse holder, unless already accomplished.

Within the next 600 hours TIS after July 20,

2001 (the effective date of this AD) or within

the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Do these actions following Raytheon Mandatory Service Bulletin SB 34–3269, Revision

1, Revised: October, 2000.

(2) Remove the P/N GMW–1 fuse and install

the new P/N GMW–3 fuse in the Avionics

Junction Box, unless already accomplished.

Within the next 600 hours TIS after July 20,

2001 (the effective date of this AD) or within

the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Do these actions following Raytheon Mandatory Service Bulletin SB 34–3269, Revision

1, Revised: October, 2000.

(3) Doing this action following Raytheon Mandatory Service Bulletin SB 34–3269, Issued:

January 2000, is considered an alternative

method of compliance with this AD.

Within the next 600 hours TIS after July 20,

2001 (the effective date of this AD) or within

the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Use the procedures in Raytheon Mandatory

Service Bulletin SB 34–3269, Issued: January 2000, if you use this alternative method

of compliance.

(g) What actions must I accomplish to address this problem for Beech Model 1900D airplanes? To address this problem, you

must accomplish the following actions:

Actions Compliance Procedures

Install the in-line fuse holder, P/N HHJ–A, in

wire J51500E–J039002, and install the 1–

ampere slow-blow fuse, P/N MDA1, in the

fuse holder, unless already accomplished.

Within the next 600 hourse TIS after July 20,

2001 (the effective date of this AD), or within the next 6 calendar months after July 20,

2001 (the effective date of this AD), whichever comes first.

Do these actions following Raytheon Mandatory Service Bulletin SB 34–3268, Issued:

April, 2000.

(h) Can I comply with this AD in any other

way? You may use an alternative method of

compliance or adjust the compliance time if:

(1) Your alternative method of compliance

provides an equivalent level of safety; and

(2) The Manager, Wichita Aircraft

Certification Office (ACO), approves your

alternative. Submit your request through an

FAA Principal Maintenance Inspector, who

may add comments and then send it to the

Manager, Wichita ACO.

Note: This AD applies to each airplane

with a KA–33 cooling blower identified in

paragraph (a) of this AD, 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 (h)

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 you have not

eliminated the unsafe condition, specific

actions you propose to address it.

(i) Where can I get information about any

already-approved alternative methods of

compliance? Contact Todd Dixon, Aerospace

Engineer, FAA, Wichita Aircraft Certification

Office, 1801 Airport Road, Mid-Continent

30300 Federal Register / Vol. 66, No. 109 / Wednesday, June 6, 2001 / Rules and Regulations

Airport, Wichita, Kansas 67209; telephone:

(316) 946–4152; facsimile: (316) 946–4407.

(j) What if I need to fly the airplane to

another location to comply with this AD? The

FAA can issue a special flight permit under

sections 21.197 and 21.199 of the Federal

Aviation Regulations (14 CFR 21.197 and

21.199) to operate your airplane to a location

where you can accomplish the requirements

of this AD.

(k) Are any service bulletins incorporated

into this AD by reference? Actions required

by this AD must be done in accordance with

Raytheon Mandatory Service Bulletin SB 34–

3267, Issued: March, 1999, Raytheon

Mandatory Service Bulletin SB 34–3268,

Issued: April, 2000, Raytheon Mandatory

Service Bulletin SB 34–3269, Issued: January

2000, and Raytheon Mandatory Service

Bulletin SB 34–3269, Revision 1, Revised:

October, 2000. The Director of the Federal

Register approved this incorporation by

reference under 5 U.S.C. 552(a) and 1 CFR

part 51. You can get copies from the

Raytheon Aircraft Company, P.O. Box 85,

Wichita, Kansas 67201–0085. You can look at

copies at the FAA, Central Region, Office of

the Regional Counsel, 901 Locust, Room 506,

Kansas City, Missouri, or at the Office of the

Federal Register, 800 North Capitol Street,

NW, suite 700, Washington, DC.

(l) When does this amendment become

effective? This amendment becomes effective

on July 20, 2001.

Issued in Kansas City, Missouri, on May

21, 2001.

Michael Gallagher,

Manager, Small Airplane Directorate, Aircraft

Certification Service.

[FR Doc. 01–13581 Filed 6–5–01; 8:45 am]

BILLING CODE 4910–13–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 99–CE–82–AD; Amendment 39–

12243; AD 2001–11–02]

RIN 2120–AA64

Airworthiness Directives; Pilatus

Aircraft LTD Models PC–12 and PC–12/

45 Airplanes

AGENCY: Federal Aviation

Administration, DOT.

ACTION: Final rule.

SUMMARY: This amendment supersedes

Airworthiness Directive (AD) 99–17–08,

which currently requires modifying the

generator 2 excitation by removing

certain diodes and installing a new 5-

amp circuit breaker and suppression

filter on certain Pilatus Aircraft Ltd.

(Pilatus) Models PC–12 and PC–12/45

airplanes. This AD is the result of the

Federal Aviation Administration’s

determination that the A250 voltage

spike suppression filter in the

modification kit can cause the circuit

breaker 235 to trip because of overload.

In extreme circumstances, this can lead

to overheating of wiring. This AD

requires you to modify the generator 2

excitation by removing certain diodes

and installing a new 5-amp circuit

breaker and suppression filter of

improved design in accordance with

revised procedures. This AD is the

result of mandatory continuing

airworthiness information (MCAI)

issued by the airworthiness authority for

Switzerland. The actions specified by

this AD are intended to prevent damage

to electrical components if generator 2

is not switched off before engine

shutdown and it overheats. This could

result in loss of electrical power to

certain critical airplane components.

DATES: This AD becomes effective on

July 23, 2001.

The Director of the Federal Register

approved the incorporation by reference

of Pilatus Service Bulletin No. 24–014,

dated October 27, 1999, as of July 23,

2001.

The Director of the Federal Register

previously approved the incorporation

by reference of Pilatus Service Bulletin

No. 24–012, dated February 19, 1999, as

of October 4, 1999 (64 FR 45149, August

19, 1999).

ADDRESSES: You may get the service

information referenced in this AD from

Pilatus Aircraft Ltd., Customer Liaison

Manager, CH–6371 Stans, Switzerland;

telephone: +41 41 619 65 09; facsimile:

+41 41 610 33 51. You may examine this

information at the Federal Aviation

Administration (FAA), Central Region,

Office of the Regional Counsel,

Attention: Rules Docket No. 99–CE–82–

AD, 901 Locust, Room 506, Kansas City,

Missouri 64106; or at the Office of the

Federal Register, 800 North Capitol

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

FOR FURTHER INFORMATION CONTACT:

Doug Rudolph, Aerospace Engineer,

FAA, Small Airplane Directorate, 901

Locust, Room 301, Kansas City,

Missouri 64106; telephone: (816) 329–

4059; facsimile: (816) 329–4090.

SUPPLEMENTARY INFORMATION:

Discussion

Has FAA Taken Any Action to This

Point?

The FAA issued AD 99–17–08,

Amendment 39–11256 (64 FR 45149,

August 19, 1999), against Pilatus models

PC–12 and PC–12/45 airplanes, to

prevent damage to electrical

components if generator 2 is not

switched off before engine shutdown

and it overheats. This could result in

loss of electrical power to certain

critical airplane components.

AD 99–17–08 requires that you do the

following on the affected airplanes:

—modify the generator 2 excitation by

removing certain diodes; and

—install a new 5-amp circuit breaker

and suppression filter.

AD 99–17–08 was the result of

mandatory continuing airworthiness

information (MCAI) issued by the

airworthiness authority for Switzerland.

What Has Happened Since AD 99–17–

08 To Begin This Action?

The Federal Office for Civil Aviation

(FOCA), which is the airworthiness

authority for Switzerland, notified the

FAA of the need to change AD 99–17–

08. The FOCA reports that after

installation of the modification kit in

accordance with Pilatus Service Bulletin

SB 24–012 and turning on electrical

power on one of the affected airplanes,

the circuit breaker CB 235 tripped.

Investigation revealed that the

suppression filter (A250) (part number

524.52.12.358) was shorted. The

suppression diode installed in the filter

was shorted and was the wrong type.

The manufacturer’s A250 voltage spike

suppression filter is inadequate and has

been replaced with an A250 voltage

spike suppression filter of improved

design.

Has FAA Taken Any Action to This

Point?

We issued a proposal to amend part

39 of the Federal Aviation Regulations

(14 CFR part 39) to include an AD that

would apply to certain Pilatus Models

PC–12 and PC–12/45 airplanes. This

proposal was published in the Federal

Register as a notice of proposed

rulemaking (NPRM) on March 5, 2001

(66 FR 13271). The NPRM proposed to

supersede AD 99–17–08, Amendment

39–11256 (64 FR 45149, August 19,

1999). The NPRM also proposed to

require you to modify the generator 2

excitation by removing certain diodes

and installing a new 5-amp circuit

breaker and suppression filter of

improved design in accordance with

revised procedures.

Was the Public Invited To Comment?

Interested persons were afforded an

opportunity to participate in the making

of this amendment. No comments were

received on the proposed rule or the

FAA’s determination of the cost to the

public.

FAA’s Determination

What Is FAA’s Final Determination on

This Issue?

After careful review of all available

information related to the subject