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2021-18-14 DG FLUGZEUGBAU GMBH: Amendment 39-21715; Docket No. FAA-2021-0212; Project Identifier 2018-CE-032-AD.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective November 4, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This  AD  applies  to  DG Flugzeugbau GmbH Models DG-808C and DG-1000T
    gliders, all serial numbers, certificated in any category.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 2800, Aircraft Fuel System

(e) UNSAFE CONDITION

    This AD was prompted by mandatory continuing airworthiness information
    (MCAI)  originated  by an  aviation  authority of  another  country to
    identify and correct an unsafe  condition on an aviation product.  The
    MCAI describes the unsafe condition as damaged polyurethane (PU)  fuel
    hoses  due  to environmental  and  fatigue deterioration.  The  FAA is
    issuing this AD to prevent  reduced or interrupted fuel supply  to the
    engine or fuel leakage. The unsafe condition, if not addressed,  could
    result in loss of engine power or in-flight fire.

(f) DEFINITIONS

(1) For purposes of this AD,  an  "affected part"  is  a  PU fuel hose in-
    stalled in an airframe fuel system or engine compartment that:

(i) Does not meet industrial standard DIN 73379-2A, or

(ii) Does not meet ISO 7840-A1 without metal shielding.

(2) For purposes of this AD,  a  "serviceable part"  is a PU fuel hose in-
    stalled in an airframe fuel system or engine compartment that:

(i) Meets industrial standard DIN 73379-2A, or

(ii) Meets industrial standard ISO 7840-A1 without metal shielding.

(g) INSPECTIONS FOR GLIDERS WITH AN AFFECTED PART INSTALLED

    Within the next 30 days after the effective date of this AD and there-
    after at  intervals not  to exceed  12 months,  visually inspect  each
    affected part for fissures, kinks, and leaks. For this inspection, the
    ignition switch must  be turned on  to run the  electric fuel pump  to
    demonstrate an operating fuel pressure.

(1) If a fissure,  kink,  or  leak is found on an affected part during any
    inspection required by the  introductory language to paragraph  (g) of
    this AD, before further flight: Replace all affected parts with unused
    (zero hours time-in-service (TIS)) serviceable parts by following para
    -graphs 3 and 4 of  the Instructions in DG Flugzeugbau  GmbH Technical
    Note No. 800/46, Doc. No. TM800-46 FE-29-01 (English version) Issue 01
    .a, dated March 7, 2018 (TN No. 800/46), or paragraphs 3 through 5  of
    the Instructions  in  DG Flugzeugbau GmbH  Technical Note No. 1000/38,
    Doc. No. TM1000-38 FE-29-01 (English version) Issue 01.a, dated Febru-
    ary 15, 2018 (TN No. 1000/38), as applicable to your model glider.

(2) If no fissures, kinks, and leaks are found  on all affected parts dur-
    ing any inspection required by the introductory language to  paragraph
    (g) of this  AD, before each  affected part accumulates  6 years since
    first installation on a glider or within 6 months after the  effective
    date of this  AD, whichever occurs  later: Replace all  affected parts
    with unused (zero hours TIS) serviceable parts by following paragraphs
    3 and 4 of the Instructions in TN No. 800/46 or paragraphs 3 through 5
    of the  Instructions in  TN No.  1000/38, as  applicable to your model
    glider. If the date of first  installation on a glider is unknown  for
    any affected hose,  replace all affected  hoses within 6  months after
    the effective date of this AD.

(h) INSPECTIONS FOR GLIDERS WITH ONLY SERVICEABLE PARTS INSTALLED

(1) Before or upon accumulating 6 years  since  first  installation  on  a
    glider and thereafter at intervals  not to exceed 12 months,  visually
    inspect each serviceable part for fissures, kinks, and leaks. For this
    inspection, the ignition switch must be turned on to run the  electric
    fuel pump to demonstrate an operating fuel pressure.

(2) If a fissure, a kink or a leak is found during any inspection required
    by paragraph  (h)(1) of  this AD,  before further  flight, replace the
    part with  an unused  (zero hours  TIS) serviceable  part by following
    paragraphs 3 and 4 of the Instructions in TN No. 800/46 or  paragraphs
    3 through 5 of  the Instructions in TN  No. 1000/38, as applicable  to
    your model glider.

(i) LIFE LIMIT

    Before accumulating 10 years  since first installation on a glider and
    thereafter at intervals not to exceed 10 years,  remove  each service-
    able part from service and  replace  with  an unused  (zero hours TIS)
    serviceable part  by following paragraphs 3 and 4  of the Instructions
    in TN No. 800/46  or  paragraphs 3 through 5 of the Instructions in TN
    No. 1000/38, as applicable to your model glider.

(j) PARTS INSTALLATION PROHIBITION

    As of the effective date of this AD,  do not install  an affected part
    on any glider.

(k) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  International Validation Branch,  has  the authority to
    approve AMOCs for this AD, if requested using the procedures found  in
    14 CFR 39.19. In  accordance with 14 CFR  39.19, send your request  to
    your principal inspector or local Flight Standards District Office, as
    appropriate. If  sending information  directly to  the manager  of the
    certification  office,  send  it  to  the  attention  of  the   person
    identified in Related Information or email: 9-AVS-AIR-730-AMOC@faa.gov

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector,  or  lacking a principal inspector,  the manager of the local
    flight standards district office/certificate holding district office.

(l) RELATED INFORMATION

(1) For more information about this AD  contact  Jim Rutherford,  Aviation
    Safety Engineer,  General Aviation & Rotorcraft Section, International
    Validation Branch, FAA, 901 Locust,  Room 301,  Kansas City, MO 64106;
    phone: (816) 329-4165; fax: (816) 329-4090;  email: jim.rutherford@faa
    .gov.

(2) Refer to European Aviation Safety Agency  (EASA)  AD 2018-0127,  dated
    June 11, 2018,  for more information.  You may examine  the EASA AD in
    the AD docket on the website at https://www.regulations.gov by search-
    ing for and locating Docket No. FAA-2021-0212.

(m) MATERIAL INCORPORATED BY REFERENCE

(1) The Director of the Federal Register  approved  the  incorporation  by
    reference of the service information  listed in this paragraph under 5
    U.S.C. 552(a) and 1 CFR part 51.

(2) You must use  this service information as applicable to do the actions
    required by this AD, unless the AD specifies otherwise.

(i) DG Flugzeugbau GmbH Technical Note No. 800/46, Doc. No. TM800-46 FE29-
    01 (English version), Issue 01.a, dated March 7, 2018.

(ii) DG Flugzeugbau GmbH Technical Note No. 1000/38, Doc. No. TM1000-38 FE
     -29-01 (English version), Issue 01.a, dated February 15, 2018.

(3) For service information identified in this AD,  contact DG Flugzeugbau
    GmbH, Otto-Lilienthal Weg 2, D-76646 Bruchsal, Germany; phone: +49 (0)
    7251 3202-0;  email: info@dg-flugzeugbau.de;  website: https://www.dg-
    flugzeugbau.de/.

(4) You may view this service information at FAA,  Airworthiness  Products
    Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106.
    For information on the availability of this material at the FAA,  call
    (816) 329-4148.

(5) You may view this service information  that is incorporated  by refer-
    ence at the National Archives and Records Administration  (NARA).  For
    information on the availability  of this material at NARA,  email: fr.
    inspection@nara.gov,   or   go  to:  https://www.archives.gov/federal-
    register/cfr/ibr-locations.html.

Issued on August 26, 2021. Lance T. Gant, Director, Compliance & Airworth-
iness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Jim Rutherford, Aviation Safety Engineer,
General Aviation & Rotorcraft Section,  International  Validation  Branch,
FAA, 901 Locust, Room 301,  Kansas City, MO 64106;  phone: (816) 329-4165;
fax: (816) 329-4090; email: jim.rutherford@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0212; Project Identifier 2018-CE-032-AD; Amendment
39-21715; AD 2021-18-14]
RIN 2120-AA64

Airworthiness Directives; DG Flugzeugbau GmbH Gliders

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
DG Flugzeugbau GmbH Models DG-808C and DG-1000T gliders. This AD was
prompted by mandatory continuing airworthiness information (MCAI)
originated by an aviation authority of another country to identify and
correct an unsafe condition on an aviation product. The MCAI identifies
the unsafe condition as damaged fuel hoses due to environmental and
fatigue deterioration. This AD requires inspecting the polyurethane
(PU) fuel hoses, replacing the PU fuel hoses if there is damage, and
establishing a life limit for the PU fuel hoses. The FAA is issuing
this AD to address the unsafe condition on these products.

DATES: This AD is effective November 4, 2021.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 4,
2021.

ADDRESSES: For service information identified in this final rule,
contact DG Flugzeugbau GmbH, Otto-Lilienthal Weg 2, D-76646 Bruchsal,
Germany; phone: +49 (0)7251 3202-0; email: info@dg-flugzeugbau.de;
website: https://www.dg-flugzeugbau.de/. You may view this service
information at the FAA, Airworthiness Products Section, Operational
Safety Branch, 901 Locust, Kansas City, MO 64106. For information on
the availability of this material at the FAA, call (816) 329-4148. It
is also available at https://www.regulations.gov by searching for and
locating Docket No. FAA-2021-0212.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0212; or in person at
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket contains this final rule, the
MCAI, any comments received, and other information. The address for
Docket Operations is U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Jim Rutherford, Aviation Safety
Engineer, General Aviation & Rotorcraft Section, International
Validation Branch, FAA, 901 Locust, Room 301, Kansas City, MO 64106;
phone: (816) 329-4165; fax: (816) 329-4090; email:
jim.rutherford@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all DG Flugzeugbau GmbH
Models DG-808C and DG-1000T gliders. The NPRM published in the Federal
Register on July 1, 2021 (86 FR 35027). The NPRM was prompted by MCAI
originated by the European Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union. EASA has
issued EASA AD 2018-0127, dated June 11, 2018 (referred to after this
as ``the MCAI''), to address an unsafe condition on DG Flugzeugbau GmbH
Models DG-808C and DG-1000T gliders. The MCAI states:

An occurrence was reported where, during accomplishment of a 10
years inspection on a DG-808C powered sailplane, a damaged (broken)
PU [polyurethane] fuel hose was found. The result of subsequent
investigation indicated that the damage mode has features of
environmental and fatigue deterioration. Additionally, it was
determined that similar PU fuel hoses are also installed on other
powered sailplane types of the same manufacturer.
This condition, if not detected and corrected, could lead to
reduced or interrupted fuel supply to the engine, consequent loss of
the available power or fire, possibly resulting in reduced control
of the powered sailplane.
To address this potential unsafe condition, DG-Flugzeugbau GmbH
issued the applicable TN [Technical Note], providing instructions to
inspect the affected parts and replace these with serviceable parts.
Additionally, service life limits were established for those
serviceable parts.
For the reasons described above, this [EASA] AD requires
repetitive inspections of the affected parts. This [EASA] AD also
requires replacement of the affected parts with serviceable parts
and introduces life limits for serviceable parts.

You may examine the MCAI in the AD docket at https://www.regulations.gov
by searching for and locating Docket No. FAA-2021-0212.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the costs.

Conclusion

This product has been approved by the aviation authority of another
country and is approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI and
service information referenced above. The FAA reviewed the relevant
data and determined that air safety requires adopting this AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. This AD is adopted as proposed in the
NPRM.

Related Service Information Under 1 CFR Part 51

The FAA reviewed DG Flugzeugbau GmbH Technical Note No. 800/46,
Doc. No. TM800-46 FE-29-01 (English version), Issue 01.a, dated March
7, 2018, for Model DG-808C gliders; and Technical Note No. 1000/38,
Doc. No. TM1000-38 FE-29-01 (English version), Issue 01.a, dated
February 15, 2018, for Model DG-1000T gliders. The service information,
as applicable to the appropriate model glider, specifies inspections of
the PU fuel hoses, replacement of the PU fuel hoses if damage is found
during an inspection, and actions to take when the hoses have reached
their life limit. This service information is reasonably available
because the interested parties have access to it through their normal
course of business or by the means identified in ADDRESSES.

Differences Between This AD and the MCAI

The MCAI requires replacing any damaged fuel hoses before next
engine operation, while this AD requires replacing damaged fuel hoses
before further flight. Even though use of the engine is optional and
the glider can operate without the engine, the glider has other
electronic equipment installed that could cause arcing and result in an
in-flight fire if there is a fuel leak.

Costs of Compliance

The FAA estimates that this AD affects 10 gliders of U.S. registry.
The FAA also estimates that inspecting the fuel hoses will take about 2
work-hours. The average labor rate is $85 per work-hour.
Based on these figures, the FAA estimates the cost of this AD on
U.S. operators to be $1,700, or $170 per glider, each inspection cycle.
In addition, the FAA estimates that each replacement required by
this AD would take about 8 work-hours and require parts costing $500.
Based on these figures, the FAA estimates the replacement cost of this
AD to be $1,180 per glider.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. Subtitle VII: Aviation Programs,
describes in more detail the scope of the Agency's authority.
The FAA is issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701: General requirements.
Under that section, Congress charges the FAA with promoting safe flight
of civil aircraft in air commerce by prescribing regulations for
practices, methods, and procedures the Administrator finds necessary
for safety in air commerce. This regulation is within the scope of that
authority because it addresses an unsafe condition that is likely to
exist or develop on products identified in this rulemaking action.

Regulatory Findings

This AD will not have federalism implications under Executive Order
13132. This AD 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.
For the reasons discussed above, I certify that this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, 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.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

The Amendment


Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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: