Federal Register / Vol. 69, No. 218 / Friday, November 12, 2004 / Proposed Rules 65391

Actions Compliance Procedures 

(1) Inspect the LH and RH upper longeron cutout-bridge, part number (P/N) PC–23102.1X) 

for cracks.

Upon accumulating 1,000 hours time-in-service (TIS) on the upper longeron or within 

the next 100 hours TIS after March 16, 

1998 (the effective date of AD 98–03–14), 

whichever occurs later, unless already done.

Follow EXTRA Service Bulletin EA–300 & 

EA–300/S Doc: SB–300–3–93, Issue: A, 

Date: January 12, 1994; or EXTRA Service 

Bulletin EA–300 & EA–300/S Doc: SB–300–

3–93, Issue: B, Date: June 10, 1998. 

(2) If you find any cracks in the upper longeron 

cutout-bridged during the inspection required 

in paragraph (e)(1) of this AD, do the following: 

(i) Repair any cracks; and 

(ii) Modify the upper longeron cutout-bridge. 

Before further flight after the inspection required in paragraph (e)(1) of this AD, unless 

already done.

Follow EXTRA Service Bulletin EA–300 & 

EA–300/S Doc: SB–300–3–93, Issue: A, 

Date: January 12, 1994; or EXTRA Service 

Bulletin EA–300 & EA–300/S Doc: SB–300–

3–93, Issue: B, Date: June 10, 1998. 

(3) If you do not find any cracks in the upper 

longeron cutout-bridge during the inspection 

required in paragraph (e)(1) of this AD, you 

must still modify the upper longeron cutoutbridge.

Before further flight after the inspection required in paragraph (e)(1) of this AD, unless 

already done.

Follow EXTRA Service Bulletin EA–300 & 

EA–300/S Doc: SB–300–3–93, Issue: A, 

Date: January 12, 1994; or EXTRA Service 

Bulletin EA–300 & EA–300/S Doc: SB–300–

3–93, Issue: B, Date: June 10, 1998. 

(4) If you modified the upper longeron cutoutbridge following EXTRA Service Bulletin EA–

300 & EA–300/S Doc: SB–300–3–93, Issue: 

A, Date: January 12, 1994, or EXTRA Service Bulletin EA–300 & EA–300/S Doc: SB–

300–3–93, Issue: B, Date: June 10, 1998, 

Procedure I, you do not need to do any further actions. 

As of the effective date of this AD ................... As stated in EXTRA Service Bulletin EA–300 

& EA–300/S Doc: SB–300–3–93, Issue: A, 

Date: January 12, 1994, or EXTRA Service 

Bulletin EA–300 & EA–300/S Doc: SB–300–

3–93, Issue: B, Date: June 10, 1998. 

(5) If you modified the upper longeron cutoutbridge following Procedure II of EXTRA 

Service Bulletin EA–300 & EA–300/S Doc: 

SB–300–3–93, Issue: B, Date: June 10, 

1998, you must replace the new internal 

bridges every 1,000 hours TIS.

As of the effective date of this Ad .................... As stated EXTRA Service Bulletin EA–300 & 

EA–300/S Doc: SB–300–3–93, Issue: A, 

Date: January 12, 1994; or EXTRA Service 

Bulletin EA–300 & EA–300/S Doc: SB–300–

3–93, Issue: B, Date: June 10, 1998. 

May I Request an Alternative Method of 

Compliance? 

(f) You may request a different method of 

compliance or a different compliance time 

for this AD by following the procedures in 14 

CFR 39.19. Unless FAA authorizes otherwise, 

send your request to your principal 

inspector. The principal inspector may add 

comments and will send your request to the 

Manager, Standards Office, Small Airplane 

Directorate, FAA. For information on any 

already approved alternative methods of 

compliance, contact Karl Schletzbaum, 

Aerospace Engineer, Small Airplane 

Directorate, 901 Locust, Room 301, Kansas 

City, MO 64106; telephone: (816) 329–4146; 

facsimile: (816) 329–4090. 

Is There Other Information That Relates to 

This Subject? 

(g) German AD Number D–1994–043R1, 

dated May 17, 2004, also addresses the 

subject of this AD. 

May I Get Copies of the Documents 

Referenced in This AD? 

(h) To get copies of the documents 

referenced in this AD, contact Extra 

Flugzeubau GmbH, Flugplatz Dinslaken, D–

46569 Hu ̈nxe, Germany. To view the AD 

docket, go to the Docket Management 

Facility; U.S. Department of Transportation, 

400 Seventh Street, SW., Nassif Building, 

Room PL–401, Washington, DC, or on the 

Internet at http://dms.dot.gov. This is docket 

number FAA–2004–19443.

Issued in Kansas City, Missouri, on 

November 5, 2004. 

James E. Jackson, 

Acting Manager, Small Airplane Directorate, 

Aircraft Certification Service.

[FR Doc. 04–25193 Filed 11–10–04; 8:45 am] 

BILLING CODE 4910–13–P

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2004–19568; Directorate 

Identifier 2004–NM–112–AD] 

RIN 2120–AA64 

Airworthiness Directives; Dornier 

Model 328–300 Series Airplanes

AGENCY: Federal Aviation 

Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain Dornier Model 328–300 series 

airplanes. This proposed AD would 

require repetitive inspections for 

discrepancies of the heat pack rotor 

assembly and rotor drive clips of the 

brake unit of the main landing gear 

(MLG), and replacing the assembly if 

any discrepancy is found. This 

proposed AD is prompted by reports of 

cracking and breakage of the heat pack 

rotor assemblies. We are proposing this 

AD to find and fix discrepancies of the 

heat pack rotor assembly of the brake 

unit of the MLG and consequent loss of 

braking capability, which could result 

in the airplane overrunning the runway 

during take-off or landing.

DATES: We must receive comments on 

this proposed AD by December 13, 

2004.

ADDRESSES: Use one of the following 

addresses to submit comments on this 

proposed AD. 

• DOT Docket Web site: Go to

http://dms.dot.gov and follow the 

instructions for sending your comments 

electronically. 

• Government-wide rulemaking Web 

site: Go to http://www.regulations.gov

and follow the instructions for sending 

your comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 400 

Seventh Street SW., Nassif Building, 

room PL–401, Washington, DC 20590. 

• By fax: (202) 493–2251. 

• Hand Delivery: Room PL–401 on 

the plaza level of the Nassif Building, 

400 Seventh Street SW., Washington, 

DC, between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

For service information identified in 

this proposed AD, contact AvCraft 

Aerospace GmbH, P.O. Box 1103, D–

82230 Wessling, Germany. 

65392 Federal Register / Vol. 69, No. 218 / Friday, November 12, 2004 / Proposed Rules 

You can examine the contents of this 

AD docket on the Internet at http://

dms.dot.gov, or in person at the Docket 

Management Facility, U.S. Department 

of Transportation, 400 Seventh Street, 

SW., room PL–401, on the plaza level of 

the Nassif Building, Washington, DC.

FOR FURTHER INFORMATION CONTACT: 

Technical information: Dan Rodina, 

Aerospace Engineer, International 

Branch, ANM–116, FAA, Transport 

Airplane Directorate, 1601 Lind 

Avenue, SW., Renton, Washington 

98055–4056; telephone (425) 227–2125; 

fax (425) 227–1149. 

Plain language information: Marcia 

Walters, marcia.walters@faa.gov.

SUPPLEMENTARY INFORMATION:

Docket Management System (DMS) 

The FAA has implemented new 

procedures for maintaining AD dockets 

electronically. As of May 17, 2004, new 

AD actions are posted on DMS and 

assigned a docket number. We track 

each action and assign a corresponding 

directorate identifier. The DMS AD 

docket number is in the form ‘‘Docket 

No. FAA–2004–99999.’’ The Transport 

Airplane Directorate identifier is in the 

form ‘‘Directorate Identifier 2004–NM–

999–AD.’’ Each DMS AD docket also 

lists the directorate identifier (‘‘Old 

Docket Number’’) as a cross-reference 

for searching purposes. 

Comments Invited 

We invite you to submit any relevant 

written data, views, or arguments 

regarding this proposed AD. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA–

2004–19568; Directorate Identifier 

2004–NM–112–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of the proposed AD. We will 

consider all comments submitted by the 

closing date and may amend the 

proposed AD in light of those 

comments. 

We will post all comments we 

receive, without change, to http://

dms.dot.gov, including any personal 

information you provide. We will also 

post a report summarizing each 

substantive verbal contact with FAA 

personnel concerning this proposed AD. 

Using the search function of our docket 

Web site, anyone can find and read the 

comments in any of our dockets, 

including the name of the individual 

who sent the comment (or signed the 

comment on behalf of an association, 

business, labor union, etc.). You can 

review the DOT’s complete Privacy Act 

Statement in the Federal Register

published on April 11, 2000 (65 FR 

19477–78), or you can visit http://

dms.dot.gov.

We are reviewing the writing style we 

currently use in regulatory documents. 

We are interested in your comments on 

whether the style of this document is 

clear, and your suggestions to improve 

the clarity of our communications that 

affect you. You can get more 

information about plain language at 

http://www.faa.gov/language and http://

www.plainlanguage.gov.

Examining the Docket 

You can examine the AD docket on 

the Internet at http://dms.dot.gov, or in 

person at the Docket Management 

Facility office between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. The Docket 

Management Facility office (telephone 

(800) 647–5227) is located on the plaza 

level of the Nassif Building at the DOT 

street address stated in the ADDRESSES

section. Comments will be available in 

the AD docket shortly after the DMS 

receives them. 

Discussion 

The Luftfahrt-Bundesamt (LBA), 

which is the airworthiness authority for 

Germany, notified us that an unsafe 

condition may exist on certain Dornier 

Model 328–300 series airplanes. The 

LBA advises that operators have 

reported inspection findings of cracking 

and breakage of the heat pack rotor 

assemblies at the rotor drive clips of the 

brake unit of the main landing gear 

(MLG). The cause of these discrepancies 

is under investigation. These 

discrepancies, if not corrected, could 

result in the airplane overrunning the 

runway during take-off or landing. 

Relevant Service Information 

Dornier has issued Service Bulletin 

328J–32–169, dated November 20, 2002; 

including Dunlop Aerospace Limited 

Service Bulletin AHA2227–32–1292, 

Revision 1, dated July 19, 2002. The 

service bulletin describes procedures for 

repetitive detailed visual inspections/

checks for discrepancies of the heat 

pack rotor assembly and rotor drive 

clips of the brake unit of the MLG, and 

replacement of the heat pack assembly 

with a new assembly if any discrepancy 

is found. The discrepancies include the 

following: 

• Cracks or breakage of the heat pack 

rotor assembly. 

• Rotors with clips that are loose or 

have missing rivets. 

• Rotors with large pieces of carbon 

missing.

Accomplishing the actions specified 

in the service information is intended to 

adequately address the unsafe 

condition. 

The LBA mandated the service 

information and issued German 

airworthiness directive D–2004–003, 

dated January 8, 2004, to ensure the 

continued airworthiness of these 

airplanes in Germany. 

FAA’s Determination and Requirements 

of the Proposed AD 

This airplane model is manufactured 

in Germany 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, 

the LBA has kept the FAA informed of 

the situation described above. We have 

examined the LBAs findings, evaluated 

all pertinent information, and 

determined that we need to issue an AD 

for products of this type design that are 

certificated for operation in the United 

States. 

Therefore, we are proposing this AD, 

which would require accomplishing the 

actions specified in the service 

information described previously, 

except as discussed under ‘‘Differences 

Between the Proposed AD and Service 

Information.’’

Differences Between the Proposed AD 

and Service Information 

Although the service bulletin 

specifies to return any unserviceable 

heat pack assemblies with unserviceable 

rotor assemblies to the parts 

manufacturer, this proposed AD would 

not include that requirement. 

Although the service bulletin 

recommends accomplishing the 

inspection/check of the heat pack rotor 

assemblies ‘‘at every wheel removal and 

at every brake installation,’’ we have 

determined that this imprecise 

compliance time would not address the 

identified unsafe condition in a timely 

manner. In developing an appropriate 

compliance time for this AD, we 

considered not only the manufacturer’s 

recommendation, but the degree of 

urgency associated with addressing the 

subject unsafe condition, the average 

utilization of the affected fleet, and the 

time necessary to perform the 

inspection. In light of all of these 

factors, we find a compliance time of 

‘‘At the next brake installation or within 

24 months after the effective date of this 

AD’’ for completing the initial 

inspection, and at repetitive intervals 

‘‘not to exceed the next brake 

installation or 24 months, whichever 

occurs first,’’ to be warranted, in that 

those times represent precise times for 

Federal Register / Vol. 69, No. 218 / Friday, November 12, 2004 / Proposed Rules 65393

affected airplanes to continue to operate 

without compromising safety. 

These differences have been 

coordinated with the LBA. 

Clarification of Inspection Terminology 

In this proposed AD, the ‘‘detailed 

visual inspection/check’’ specified in 

the service bulletin is referred to as a 

‘‘detailed inspection.’’ We have 

included the definition for a detailed 

inspection in a note in the proposed AD. 

Interim Action 

We consider this proposed AD 

interim action. If final action is later 

identified, we may consider further 

rulemaking then. 

Costs of Compliance 

This proposed AD would affect about 

49 airplanes of U.S. registry. The 

proposed inspection would take about 1 

work hour per airplane, at an average 

labor rate of $65 per work hour. Based 

on these figures, the estimated cost of 

the proposed AD for U.S. operators is 

$3,185, or $65 per airplane, per 

inspection cycle. 

Regulatory Findings 

We have determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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. 

For the reasons discussed above, I 

certify that the 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. 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this proposed AD. See the ADDRESSES

section for a location to examine the 

regulatory evaluation.

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety.

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD):

Fairchild Dornier GmbH (Formerly Dornier 

Luftfahrt GmbH): Docket No. FAA–

2004–19568; Directorate Identifier 2004–

NM–112–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

must receive comments on this AD action by 

December 13, 2004. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Dornier Model 328–

300 series airplanes; certificated in any 

category; equipped with a Dunlop brake unit 

having part number AHA2227–3 or –4. 

Unsafe Condition 

(d) This AD was prompted by reports of 

cracking and breakage of the heat pack rotor 

assemblies. We are issuing this AD to find 

and fix discrepancies of the heat pack rotor 

assembly of the brake unit of the main 

landing gear (MLG) and consequent loss of 

braking capability, which could result in the 

airplane overrunning the runway during 

take-off or landing. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Repetitive Inspections/Replacement if 

Necessary 

(f) At the next brake installation or within 

24 months after the effective date of this AD, 

whichever is first: Accomplish a detailed 

inspection for discrepancies of the heat pack 

rotor assembly and rotor drive clips of the 

brake unit of the MLG by doing all the 

actions specified in the Accomplishment 

Instructions of Dornier Service Bulletin 328J–

32–169, dated November 20, 2002. If any 

discrepancy is found, before further flight, 

replace the heat pack rotor assembly with a 

new assembly in accordance with the service 

bulletin. Repeat the inspection thereafter at 

intervals not to exceed the next brake 

installation or 24 months, whichever is first.

Note 1: For the purposes of this AD, a 

detailed inspection is: ‘‘An intensive 

examination of a specific item, installation, 

or assembly to detect damage, failure, or 

irregularity. Available lighting is normally 

supplemented with a direct source of good 

lighting at an intensity deemed appropriate. 

Inspection aids such as mirror, magnifying 

lenses, etc., may be necessary. Surface 

cleaning and elaborate procedures may be 

required.’’

Alternative Methods of Compliance 

(AMOCs) 

(g) The Manager, International Branch, 

ANM–116, Transport Airplane Directorate, 

FAA, has the authority to approve AMOCs 

for this AD, if requested in accordance with 

the procedures found in 14 CFR 39.19. 

Related Information 

(h) German airworthiness directive D–

2004–003, dated January 8, 2004, also 

addresses the subject of this AD.

Issued in Renton, Washington, on 

November 3, 2004. 

Kevin M. Mullin, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service.

[FR Doc. 04–25192 Filed 11–10–04; 8:45 am] 

BILLING CODE 4910–13–P

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 52 

[R07–OAR–2004–IA–0005; FRL–7836–3] 

Approval and Promulgation of State 

Implementation Plans; State of Iowa

AGENCY: Environmental Protection 

Agency (EPA).

ACTION: Proposed rule.

SUMMARY: EPA is proposing to approve 

a revision to the Iowa state 

implementation plan (SIP) for the 

purpose of adding information to 

establish exemptions for equipment that 

is either used for nonproduction 

activities or exhausted inside a building, 

to establish an exemption for manuallyoperated equipment, and to establish 

exemptions for emission units that can 

be classified as small units. The state 

has determined that air pollution 

emissions from this equipment are 

negligible and these exemptions are 

likely to result in no significant impact 

on human health or the environment.

DATES: Comments on this proposed 

action must be received in writing by 

December 13, 2004.

ADDRESSES: Comments may be mailed to 

Heather Hamilton, Environmental 

Protection Agency, Air Planning and 

Development Branch, 901 North 5th 

Street, Kansas City, Kansas 66101. 

Comments may also be submitted 

electronically or through hand delivery/

courier; please follow the detailed 

instructions in the Addresses section of 

the direct final rule which is located in 

the rules section of this Federal 

Register.

FOR FURTHER INFORMATION CONTACT:

Heather Hamilton at (913) 551–7039, or 

by e-mail at hamilton.heather@epa.gov.