[Federal Register Volume 63, Number 118 (Friday, June 19, 1998)]
[Rules and Regulations]
[Pages 33537-33539]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-15893]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98-CE-13-AD; Amendment 39-10594; AD 98-13-06]
RIN 2120-AA64


Airworthiness Directives; Glaser-Dirks Flugzeugbau GmbH Model DG-
400 Gliders

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to certain Glaser-Dirks Flugzeugbau GmbH (Glaser-Dirks) Model 
DG-400 gliders. This AD requires replacing the bungees that secure the 
left engine restraining cable and the bowden cable of the rear engine 
door. This AD is the result of mandatory continuing airworthiness 
information (MCAI) issued by the airworthiness authority for Germany. 
The actions specified by this AD are intended to prevent the engine 
from locking in flight and not extending because of the left 
restraining cable or bowden cable of the rear door making contact with 
the engine, which could result in loss of glider power and potential 
loss of control.

DATES: Effective August 2, 1998.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of August 2, 1998.

ADDRESSES: Service information that applies to this AD may be obtained 
from DG Flugzeugbau GmbH, Postfach 4120, D-76625 Bruchsal 4, Germany; 
telephone: +49 7257-89-0; facsimile: +49 7257-8922. This information 
may also be examined at the Federal Aviation Administration (FAA), 
Central Region, Office of the Regional Counsel, Attention: Rules Docket 
No. 98-CE-13-AD, Room 1558, 601 E. 12th Street, 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: Mr. Mike Kiesov, Aerospace Engineer, 
Small

[[Page 33538]]

Airplane Directorate, Aircraft Certification Service, FAA, 1201 Walnut, 
suite 900, Kansas City, Missouri 64106; telephone: (816) 426-6934; 
facsimile: (816) 426-2169.

SUPPLEMENTARY INFORMATION:

Events Leading to the Issuance of This AD

    A proposal to amend part 39 of the Federal Aviation Regulations (14 
CFR part 39) to include an AD that would apply to certain Glaser-Dirks 
Model DG-400 gliders was published in the Federal Register as a notice 
of proposed rulemaking (NPRM) on March 19, 1998 (63 FR 13376). The NPRM 
proposed to require replacing the bungees that secure the left engine 
restraining cable and the bowden cable of the rear engine door. 
Accomplishment of the proposed action as specified in the NPRM would be 
in accordance with Glaser-Dirks Technical Note No. 826/15, dated 
October 1, 1985.
    The NPRM was the result of mandatory continuing airworthiness 
information (MCAI) issued by the airworthiness authority for Germany.
    Interested persons have been 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.

The FAA's Determination

    After careful review of all available information related to the 
subject presented above, the FAA has determined that air safety and the 
public interest require the adoption of the rule as proposed except for 
minor editorial corrections. The FAA has 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.

Compliance Time of This AD

    Although the left engine restraining cable or bowden cable of the 
rear engine door would only contact the engine and block the engine 
extension during flight, this unsafe condition is not a result of the 
number of times the glider is operated. The chance of this situation 
occurring is the same for a glider with 10 hours time-in-service (TIS) 
as it is for a glider with 500 hours TIS. For this reason, the FAA has 
determined that a compliance based on calendar time should be utilized 
in this AD in order to assure that the unsafe condition is addressed on 
all gliders in a reasonable time period.

Cost Impact

    The FAA estimates that 27 gliders in the U.S. registry will be 
affected by this AD, that it will take approximately 3 workhours per 
glider to accomplish this action, and that the average labor rate is 
approximately $60 an hour. Parts cost approximately $20 per glider. 
Based on these figures, the total cost impact of this AD on U.S. 
operators is estimated to be $5,400, or $200 per glider.

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 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, 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.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
(AD) to read as follows:

98-13-06  Glaser-Dirks Flugzeugbau GMBH: Amendment 39-10594; Docket 
No. 98-CE-13-AD.

    Applicability: Model DG-400 gliders, serial numbers 4-1 through 
4-140, certificated in any category.

    Note 1: This AD applies to each glider 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 gliders 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 (c) 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 within the next 3 calendar months after the 
effective date of this AD, unless already accomplished.
    To prevent the engine from locking in flight and not extending 
because of the left restraining cable or bowden cable of the rear 
door catching on the engine, which could result in loss of glider 
power and potential loss of control, accomplish the following:
    (a) Replace the bungees that secure the left engine restraining 
cable and the bowden cable of the rear engine door in accordance 
with the Installation plan included with Glaser-Dirks Technical Note 
No. 826/15, dated October 1, 1985.
    (b) 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 glider to a location where the 
requirements of this AD can be accomplished.
    (c) An alternative method of compliance or adjustment of the 
compliance time that provides an equivalent level of safety may be 
approved by the Manager, Small Airplane Directorate, FAA, 1201 
Walnut, suite 900, Kansas City, Missouri 64106. The request shall be 
forwarded through an appropriate FAA Maintenance Inspector, who may 
add comments and then send it to the Manager, Small Airplane 
Directorate.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Small Airplane Directorate.

    (d) Questions or technical information related to Glaser-Dirks 
Technical Note No. 826/15, dated October 1, 1985, should be directed 
to DG Flugzeugbau GmbH, Postfach 4120, D-76625 Bruchsal 4, Germany; 
telephone: +49 7257-89-0; facsimile: +49 7257-8922. This service 
information may be examined at the FAA, Central Region, Office of 
the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, 
Missouri 64106.
    (e) The replacements required by this AD shall be done in 
accordance with Glaser-

[[Page 33539]]

Dirks Technical Note No. 826/15, dated October 1, 1985. 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 DG Flugzeugbau GmbH, Postfach 4120, 
D-76625 Bruchsal 4, Germany. Copies may be inspected at the FAA, 
Central Region, Office of the Regional Counsel, Room 1558, 601 E. 
12th Street, Kansas City, Missouri, or at the Office of the Federal 
Register, 800 North Capitol Street, NW, suite 700, Washington, DC.

    Note 3: The subject of this AD is addressed in German AD 85-223, 
dated November 7, 1985.
    (f) This amendment becomes effective on August 2, 1998.
    Issued in Kansas City, Missouri, on June 8, 1998.
Michael Gallagher,
Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. 98-15893 Filed 6-18-98; 8:45 am]
BILLING CODE 4910-13-U