Proposed Rule2021-23325
Airworthiness Directives; Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (Type Certificate Previously Held by GROB Aircraft AG, Grob Aerospace GmbH i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH & Co. KG) Gliders
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
October 29, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for all Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (type certificate previously held by GROB Aircraft AG, Grob Aerospace GmbH i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH & Co. KG) Model G102 ASTIR CS, G103 TWIN ASTIR, G103 TWIN II, G103A TWIN II ACRO, G103C TWIN III ACRO, and G 103 C TWIN III SL gliders. This proposed AD was prompted by mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as corrosion on the elevator control pushrod. This proposed AD would require inspecting the elevator control pushrod for water and corrosion and replacing the pushrod if necessary. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 207 (Friday, October 29, 2021)</title>
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[Federal Register Volume 86, Number 207 (Friday, October 29, 2021)]
[Proposed Rules]
[Pages 59903-59905]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-23325]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0944; Project Identifier MCAI-2020-00800-G]
RIN 2120-AA64
Airworthiness Directives; Fiberglas-Technik Rudolf Lindner GmbH &
Co. KG (Type Certificate Previously Held by GROB Aircraft AG, Grob
Aerospace GmbH i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und
Raumfahrt GmbH & Co. KG) Gliders
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 all Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (type
certificate previously held by GROB Aircraft AG, Grob Aerospace GmbH
i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH & Co.
KG) Model G102 ASTIR CS, G103 TWIN ASTIR, G103 TWIN II, G103A TWIN II
ACRO, G103C TWIN III ACRO, and G 103 C TWIN III SL gliders. This
proposed AD was prompted by mandatory continuing airworthiness
information (MCAI) issued by the aviation authority of another country
to identify and correct an unsafe condition on an aviation product. The
MCAI describes the unsafe condition as corrosion on the elevator
control pushrod. This proposed AD would require inspecting the elevator
control pushrod for water and corrosion and replacing the pushrod if
necessary. The FAA is proposing this AD to address the unsafe condition
on these products.
DATES: The FAA must receive comments on this proposed AD by December
13, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE, Washington, DC 20590.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this NPRM, contact Fiberglas-
Technik Rudolf Lindner GmbH & Co. KG, Steige 3, D-88487 Walpertshofen,
Germany; phone: +49 (0) 7353 22 43; email: <a href="/cdn-cgi/l/email-protection#432a2d252c030f17016e7f22632b3126257e" http: Lindner.com">Lindner.com</a>">info@LTB-<a href="http://Lindner.com">Lindner.com</a></a>;
website: <a href="https://www.ltb-lindner.com">https://www.ltb-lindner.com</a>. 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.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0944; 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 NPRM, the MCAI,
any comments received, and other information. The street address for
Docket Operations is listed above.
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:
<a href="/cdn-cgi/l/email-protection#caa0a3a7e4b8bfbea2afb8aca5b8ae8aacababe4ada5bc"><span class="__cf_email__" data-cfemail="f79d9e9ad98582839f928591988593b7919696d9909881">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include ``Docket No. FAA-2021-0944; Project Identifier
MCAI-2020-00800-G'' at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this proposal because of those comments.
Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any
[[Page 59904]]
personal information you provide. The agency will also post a report
summarizing each substantive verbal contact received about this NPRM.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this NPRM contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this NPRM, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this NPRM. Submissions containing CBI should be sent to Jim
Rutherford, Aviation Safety Engineer, FAA, General Aviation &
Rotorcraft Section, International Validation Branch, FAA, 901 Locust,
Room 301, Kansas City, MO 64106. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.
Background
The European Union Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union, has issued
EASA AD 2020-0138, dated June 19, 2020 (referred to after this as ``the
MCAI''), to address an unsafe condition on Fiberglas-Technik R. Lindner
GmbH & Co. KG Model ASTIR CS, ASTIR CS 77, ASTIR CS Jeans, CLUB ASTIR
II, STANDARD ASTIR II, TWIN ASTIR, TWIN ASTIR TRAINER, GROB G 103
``TWIN II,'' GROB G 103 A ``TWIN II ACRO,'' GROB G 103 C ``TWIN III,''
GROB G 103 C ``TWIN III ACRO,'' GROB G 103 C TWIN III SL, ASTIR CS 77
TOP, ASTIR CS JEANS TOP, and ASTIR CS TOP gliders. The MCAI states:
During a routine inspection, a severely corroded elevator
control pushrod was found in the vertical fin on a Grob TWIN ASTIR
sailplane. The technical investigation results revealed that water
had soaked into the elevator control pushrod, causing the corrosion
damage and subsequent considerable weakening of the steel tube
pushrod.
This condition, if not detected and corrected, could lead to
failure of the elevator control pushrod, possibly resulting in loss
of control of the sailplane.
To address this unsafe condition, Fiberglas-Technik R. Lindner
GmbH & Co.KG published the [technische mitteilung/service bulletin]
TM/SB and [anweisung/instructions] A/I-G09, at original issue,
providing instructions for elevator control pushrod inspection and
replacement. Prompted by this development, EASA issued AD 2020-0121
to require a one-time inspection of the elevator control pushrod in
the vertical fin and, depending on findings, replacement.
After EASA AD 2020-0121 was issued, it was determined that Grob
G 103 ``TWIN II'' sailplanes, and additional Grob G 103 A ``TWIN II
ACRO'' sailplanes, are also prone to elevator control pushrod
corrosion and Fiberglas-Technik R.Lindner GmbH & Co.KG issued the
TM/SB to make the inspection instructions applicable to these
sailplane models.
For the reasons described above, this [EASA] AD retains the
requirements of EASA AD 2020-0121, which is superseded, and expands
the Applicability.
You may examine the MCAI in the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-2021-
0944.
FAA's Determination
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 is issuing this NPRM
after determining that the unsafe condition described previously is
likely to exist or develop on other products of the same type design.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Fiberglas-Technik Rudolf Lindner Anweisung/
Instructions (A/I-G09), Revision 1, dated May 14, 2020. This service
information provides instructions to inspect the elevator control
pushrod for water and corrosion, replace the elevator control pushrod
if any water or corrosion is found, and apply corrosion prevention if
no water and no corrosion are found. 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.
Other Related Service Information
The FAA also reviewed Fiberglas-Technik Rudolf Lindner Service
Bulletin (SB-G09), Revision 1, dated May 14, 2020. This service
information refers to the instructions in A/I-G09 to inspect and
replace the elevator control pushrod on various gliders.
The FAA reviewed Grob TFE Service Bulletin TM 315-34, dated
December 8, 1987. This service information provides effectivity,
reason, and high-level instructions for inspecting and replacing the
elevator control pushrod on certain Model G 103 A TWIN II ACRO gliders.
The FAA reviewed Grob TFE Repair Instructions No. 315-34 for
Service Bulletin TM 315-34, dated December 8, 1987. This service
information provides more detailed instructions for inspecting and
replacing the elevator control pushrod on certain Model G 103 A TWIN II
ACRO gliders.
Proposed AD Requirements
This proposed AD would require inspecting the elevator control
pushrod and replacing it if water or corrosion are found.
Differences Between This Proposed AD and the MCAI
The MCAI applies to Model ASTIR CS 77, ASTIR CS Jeans, CLUB ASTIR
II, STANDARD ASTIR II, TWIN ASTIR TRAINER, GROB G 103 C ``TWIN III,''
ASTIR CS 77 TOP, ASTIR CS JEANS TOP, and ASTIR CS TOP gliders. This
proposed AD would not apply to these model gliders because they do not
have an FAA type certificate.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 149 gliders of U.S. registry. The FAA estimates that it would
take about 4 work-hours per glider to inspect the elevator control
pushrod and require parts costing $100. The average labor rate is $85
per work-hour. Based on these figures, the FAA estimates the cost to
inspect the elevator control pushrod on U.S. operators to be $65,560 or
$440 per glider.
In addition, the FAA estimates that for gliders with water or
corrosion within the elevator control pushrod, replacement would take
about 8 work-hours and require parts costing $500. The average labor
rate is $85 per work-hour. Based on these figures, the FAA estimates
the replacement of this proposed 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.
[[Page 59905]]
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
The FAA 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 this proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Would not affect intrastate aviation in Alaska, and
(3) Would 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 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
0
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]
0
2. The FAA amends Sec. 39.13 by adding the following new airworthiness
directive:
Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (Type Certificate
Previously Held by GROB Aircraft AG, Grob Aerospace GmbH i.l., Grob
Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH & Co. KG):
Docket No. FAA-2021-0944; Project Identifier MCAI-2020-00800-G.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by December 13, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to the following gliders, all serial numbers,
certificated in any category:
(1) Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (type
certificate previously held by GROB Aircraft AG, Grob Aerospace GmbH
i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH &
Co. KG, GROB TFE, GROB-WERKE GMBH & CO KG (a division of Burkhart
Grob Flugzeugbau)) Model G102 ASTIR CS.
(2) Fiberglas-Technik Rudolf Lindner GmbH & Co. KG (type
certificate previously held by GROB Aircraft AG, Grob Aerospace GmbH
i.l., Grob Aerospace GmbH, Burkhart Grob Luft-und Raumfahrt GmbH &
Co. KG)) Model G103 TWIN ASTIR, G103 TWIN II, G103A TWIN II ACRO,
G103 C TWIN III ACRO, and G 103 C TWIN III SL.
(d) Subject
Joint Aircraft System Component (JASC) Code 2730, Elevator
Control System.
(e) Unsafe Condition
This AD was prompted by mandatory continuing airworthiness
information (MCAI) issued by the aviation authority of another
country to identify and correct an unsafe condition on an aviation
product. The MCAI describes the unsafe condition as corrosion on the
elevator control pushrod. The unsafe condition, if not addressed,
could result in failure of the elevator control pushrod and loss of
control of the glider.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Within 25 hours time in service (TIS) after the effective
date of this AD, inspect the elevator control pushrod in the
vertical fin for water and corrosion, and replace the elevator
control pushrod before further flight if there is any water or
corrosion in accordance with the Actions and Instructions, paragraph
3, of Fiberglas-Technik Rudolf Lindner Anweisung/Instructions (A/I-
G09), Revision 1, dated May 14, 2020.
(2) If no water and no corrosion is detected, before further
flight, treat the inside of the elevator control pushrod with
corrosion preventative LPS 3 or equivalent.
(3) If required by paragraph (g)(1) of this AD, you must replace
the elevator control pushrod before further flight with an elevator
control pushrod that has zero hours TIS or with an elevator control
pushrod that has passed the inspection in accordance with paragraphs
(g)(1) and (2) of this AD.
(h) Credit for Previous Actions
You may take credit for the actions required by paragraphs
(g)(1) and (2) of this AD if you performed these actions before the
effective date of this AD using Fiberglas-Technik Rudolf Lindner
Anweisung/Instructions (A/I-G09), dated April 8, 2020.
(i) Alternative Methods of Compliance (AMOCs)
(1) The Manager, International Validation Branch, FAA, 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 paragraph (j)(1) of this AD or
email: <a href="/cdn-cgi/l/email-protection#685145293e3b4529213a455f5b58452925272b280e0909460f071e"><span class="__cf_email__" data-cfemail="8fb6a2ced9dca2cec6dda2b8bcbfa2cec2c0cccfe9eeeea1e8e0f9">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(j) 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:
<a href="/cdn-cgi/l/email-protection#87edeeeaa9f5f2f3efe2f5e1e8f5e3c7e1e6e6a9e0e8f1"><span class="__cf_email__" data-cfemail="c4aeada9eab6b1b0aca1b6a2abb6a084a2a5a5eaa3abb2">[email protected]</span></a>.
(2) Refer to European Union Aviation Safety Agency (EASA) AD
2020-0138, dated June 19, 2020, for more information. You may
examine the EASA AD in the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a>
by searching for and locating it in Docket No. FAA-2021-0944.
(3) For service information identified in this AD, contact
Fiberglas-Technik Rudolf Lindner GmbH & Co. KG, Steige 3, D-88487
Walpertshofen, Germany; phone: +49 (0) 7353 22 43; email: <a href="/cdn-cgi/l/email-protection#c3aaada5ac838f9781eeffa2e3abb1a6a5fe" http: Lindner.com">Lindner.com</a>">info@LTB-<a href="http://Lindner.com">Lindner.com</a></a>; website: <a href="https://www.ltb-lindner.com">https://www.ltb-lindner.com</a>. You may view this
referenced 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.
Issued on October 21, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-23325 Filed 10-28-21; 8:45 am]
BILLING CODE 4910-13-P
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