[Federal Register: May 20, 2004 (Volume 69, Number 98)]
[Proposed Rules]
[Page 29106-29108]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr20my04-22]
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Proposed Rules
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains notices to the public of
the proposed issuance of rules and regulations. The purpose of these
notices is to give interested persons an opportunity to participate in
the rule making prior to the adoption of the final rules.
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[[Page 29106]]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 2004-CE-06-AD]
RIN 2120-AA64
Airworthiness Directives; DG Flugzeugbau GmbH, Model DG-500MB
Sailplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain DG Flugzeugbau GmbH, Model DG-500MB sailplanes. This
proposed AD would require you to replace the engine pylon extension/
retraction Warner LA10 spindle drive with an improved designed Stross
BSA 10 spindle drive and to modify the electrical system following
applicable service information. This proposed AD is the result of
mandatory continuing airworthiness information (MCAI) issued by the
airworthiness authority for Germany. We are issuing this proposed AD to
prevent failure of the Warner LA10 spindle drive, which could result in
the engine pylon not rising or lowering. This condition could cause an
unstable engine pylon assembly during flight with loss of control of
the sailplane.
DATES: We must receive any comments on this proposed AD by July 9,
2004.
ADDRESSES: Use one of the following to submit comments on this proposed
AD:
By mail: FAA, Central Region, Office of the Regional
Counsel, Attention: Rules Docket No. 2004-CE-06-AD, 901 Locust, Room
506, Kansas City, Missouri 64106.
By fax: (816) 329-3771.
By e-mail: 9-ACE-7-Docket@faa.gov. Comments sent
electronically must contain ``Docket No. 2004-CE-06-AD'' in the subject
line. If you send comments electronically as attached electronic files,
the files must be formatted in Microsoft Word 97 for Windows or ASCII.
You may get the service information identified in this proposed AD
from DG Flugzeugbau, Postbox 41 20, 76625 Bruchsal, Germany; telephone,
49 7257 890; fax, 49 7257 8922.
You may view the AD docket at FAA, Central Region, Office of the
Regional Counsel, Attention: Rules Docket No. 2004-CE-06-AD, 901
Locust, Room 506, Kansas City, Missouri 64106. Office hours are 8 a.m.
to 4 p.m., Monday through Friday, except Federal holidays.
FOR FURTHER INFORMATION CONTACT: Gregory Davison, Aerospace Engineer,
FAA, Small Airplane Directorate, ACE-112, Room 301, 901 Locust, Kansas
City, Missouri 64106; telephone: 816-329-4130; facsimile: 816-329-4090.
SUPPLEMENTARY INFORMATION:
Comments Invited
How Do I Comment on This Proposed AD?
We invite you to submit any written relevant data, views, or
arguments regarding this proposal. Send your comments to an address
listed under ADDRESSES. Include ``AD Docket No. 2004-CE-06-AD'' in the
subject line of your comments. If you want us to acknowledge receipt of
your mailed comments, send us a self-addressed, stamped postcard with
the docket number written on it. We will date-stamp your postcard and
mail it back to you.
Are There Any Specific Portions of This Proposed AD I Should Pay
Attention to?
We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. If you
contact us through a nonwritten communication and that contact relates
to a substantive part of this proposed AD, we will summarize the
contact and place the summary in the docket. We will consider all
comments received by the closing date and may amend this proposed AD in
light of those comments and contacts.
Discussion
What Events Have Caused This Proposed AD?
The Luftfahrt-Bundesamt (LBA), which is the airworthiness authority
for Germany, recently notified FAA that an unsafe condition may exist
on DG Flugzeugbau GmbH, Model DG-500MB sailplanes, all serial numbers
up to and including 5E220B15. The LBA reports two separate fatigue
failures of the Warner LA10 spindle drive.
What Are the Consequences if the Condition Is Not Corrected?
Failure of the Warner LA10 spindle drive could result in the engine
pylon not rising or lowering, which could cause an unstable engine
pylon assembly during flight. Failure of the engine pylon assembly
during flight could result in loss of control of the sailplane.
Is There Service Information That Applies to This Subject?
DG Flugzeugbau GmbH has issued Technical Note No. 843/18, issue 2,
dated June 25, 2003.
What Are the Provisions of This Service Information?
The technical note includes procedures for installing the Stross
BSA 10 spindle drive and modifying the electrical system.
What Action Did the LBA Take?
The LBA classified this service bulletin as mandatory and issued
Germany AD Number 2003-409, dated December 9, 2003, to ensure the
continued airworthiness of these sailplanes in Germany.
Did the LBA Inform the United States Under the Bilateral Airworthiness
Agreement?
The DG Flugzeubau Model DG-500MB 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.
Under this bilateral airworthiness agreement, the LBA has kept us
informed of the situation described above.
FAA's Determination and Requirements of this Proposed AD
What Has FAA Decided?
We have examined the LBA's findings, reviewed all available
information, and determined that AD action is necessary for products of
this
[[Page 29107]]
type design that are certificated for operation in the United States.
Since the unsafe condition described previously is likely to exist
or develop on other DG Flugzeubau Model DG-500MB sailplanes of the same
type design that are registered in the United States, we are proposing
AD action to prevent failure of the spindle drive, which could result
in the engine pylon not rising or lowering and cause an unstable engine
pylon assembly during flight.
What Would This Proposed AD Require?
This proposed AD would require you to replace the Warner LA10
spindle drive with the Stross BSA 10 spindle drive and to modify the
electrical system following Technical Note No. 843/18, issue 2, dated
June 25, 2003.
How Does the Revision to 14 CFR Part 39 Affect This Proposed AD?
On July 10, 2002, we published a new version of 14 CFR part 39 (67
FR 47997, July 22, 2002), which governs FAA's AD system. This
regulation now includes material that relates to altered products,
special flight permits, and alternative methods of compliance. This
material previously was included in each individual AD. Since this
material is included in 14 CFR part 39, we will not include it in
future AD actions.
Costs of Compliance
How Many Sailplanes Would This Proposed AD Impact?
We estimate that this proposed AD affects 4 sailplanes in the U.S.
registry.
What Would be the Cost Impact of This Proposed AD on Owners/Operators
of the Affected Sailplanes?
We estimate the following costs to accomplish the proposed
replacement and modification that would be required.
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Total cost per Total cost on
Labor cost Parts cost sailplane U.S. operators
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12 work hours est. $65 per hour = $780.............. $2,662 $3.442 $13,768
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Regulatory Findings
Would This Proposed AD Impact Various Entities?
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.
Would This Proposed AD Involve a Significant Rule or Regulatory Action?
For the reasons discussed above, I certify that this proposed AD:
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 summary of the costs to comply with this proposed AD
and placed it in the AD Docket. You may get a copy of this summary by
sending a request to us at the address listed under ADDRESSES. Include
``AD Docket No. 2004-CE-06-AD'' in your request.
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 Federal Aviation Administration 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.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new
airworthiness directive (AD):
DG Flugzeugbau GmbH: Docket No. 2004-CE-06-AD.
When Is the Last Date I Can Submit Comments on This Proposed AD?
(a) We must receive comments on this proposed airworthiness
directive (AD) by July 9, 2004.
What Other ADs Are Affected by This Action?
(b) None.
What Sailplanes Are Affected by This AD?
(c) This AD affects the following sailplane models and serial
numbers that are certificated in any category: DG Flugzeugbau Model
DG-500MB, all serial numbers up to and including 5E220B15.
What Is the Unsafe Condition Presented in This AD?
(d) This AD is the result of Warner LA10 spindle drive failure.
The actions specified in this AD are intended to prevent failure of
the Warner LA10 spindle drive, which could result in the engine
pylon not rising or lowering. This condition could cause an unstable
engine pylon assembly during flight with consequent loss of control
of the sailplane.
What Must I Do To Address This Problem?
(e) To address this problem, you must do the following:
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Actions Compliance Procedures
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Replace the Warner LA10 Replace and modify Follow the
spindle drive with the within 25 hours instructions in
Stross BSA 10 spindle drive time in service Technical Note No.
and make any necessary (TIS) after the 843/18 issue 2,
electrical modifications effective date of dated June 25,
including installation of this AD. 2003.
the voltage converter for
the brake of the spindle
drive.
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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 Gregory Davison,
Aerospace Engineer, FAA, Small Airplane Directorate, ACE-112, Room
301, 901 Locust,
[[Page 29108]]
Kansas City, Missouri 64106; telephone: 816-329-4130; facsimile:
816-329-4090.
May I Get Copies of the Documents Referenced in This AD?
(g) You may get copies of the documents referenced in this AD
from DG Flugzeugbau, Postbox 41 20, 76625 Bruchsal, Germany. You may
view these documents at FAA, Central Region, Office of the Regional
Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106.
Is There Other Information That Relates to This Subject?
(h) LBA airworthiness directive 2003-409, dated December 9,
2003, and Technical Note No. 843/18, issue 2, dated June 25, 2003,
also address the subject of this AD.
Issued in Kansas City, Missouri, on May 12, 2004.
James E. Jackson,
Acting Manager, Small Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 04-11371 Filed 5-19-04; 8:45 am]
BILLING CODE 4910-13-P