Airworthiness Directives; Stemme AG Gliders, 48065-48067 [2021-18387]
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Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules
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lotter on DSK11XQN23PROD with PROPOSALS1
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[FR Doc. 2021–18351 Filed 8–26–21; 8:45 am]
BILLING CODE 6450–01–P
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Jkt 253001
48065
Federal Aviation Administration
Kansas City, MO 64106. For information
on the availability of this material at the
FAA, call (816) 329–4148.
14 CFR Part 39
Examining the AD Docket
DEPARTMENT OF TRANSPORTATION
[Docket No. FAA–2021–0716; Project
Identifier 2019–CE–023–AD]
RIN 2120–AA64
Airworthiness Directives; Stemme AG
Gliders
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
The FAA proposes to adopt a
new airworthiness directive (AD) for all
Stemme AG Model Stemme S 12 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 an
airspeed indicator (ASI) with speed
markings inconsistent with the
approved and published values. This
proposed AD would require inspecting
the ASI markings and, depending on
findings, either replacing the ASI or
amending the existing aircraft flight
manual (AFM) until the ASI is replaced.
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 October 12,
2021.
ADDRESSES: You may send comments,
using the procedures found in 14 CFR
11.43 and 11.45, by any of the following
methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: (202) 493–2251.
• 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.
• 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 STEMME AG,
Flugplatzstrasse F2, Nr. 6–7, D–15344
Strausberg, Germany; phone: +49 (0)
3341 3612–0, fax: +49 (0) 3341 3612–30;
email: airworthiness@stemme.de;
website: https://www.stemme.com. You
may view this service information at the
FAA, Airworthiness Products Section,
Operational Safety Branch, 901 Locust,
SUMMARY:
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You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0716; 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: jim.rutherford@
faa.gov.
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–2021–0716; Project Identifier
2019–CE–023–AD’’ 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 https://
www.regulations.gov, including any
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
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48066
Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules
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, 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
2019–0082, dated April 12, 2019
(referred to after this as ‘‘the MCAI’’), to
address an unsafe condition on Stemme
AG Model Stemme S 12 gliders. The
MCAI states:
During a production inspection of a new
powered sailplane, an ASI was found with
speed markings inconsistent with the
approved and published values (begin[ning]
of the white and green arc). Subsequent
investigation of the production records for
delivered Stemme S 12 powered sailplanes
does not exclude that a similar, nonconforming ASI was installed during
production.
This condition, if not corrected, could lead
to erroneous information being provided to
the pilot, particularly at the lower speed
operation limits, possibly resulting in
reduced control of the powered sailplane.
To address this unsafe condition, Stemme
AG issued the SB [service bulletin] to
provide inspections instructions.
For the reason described above, this
[EASA] AD requires a one-time inspection of
the markings of the affected part and,
depending on findings, amending the
Aircraft Flight Manual (AFM) and replacing
the affected part. This [EASA] AD also
prohibits installation of affected parts.
lotter on DSK11XQN23PROD with PROPOSALS1
You may examine the MCAI in the
AD docket at https://
www.regulations.gov by searching for
and locating Docket No. FAA–2021–
0716.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Stemme Service
Bulletin No. P062–980027, Revision 00,
dated December 17, 2018. The service
information specifies checking the ASI
markings and provides illustrations of
correct markings. The service
information specifies the procedure to
replace an affected ASI with an ASI
with correct markings. The service
information also includes a temporary
page to insert into the AFM until the
VerDate Sep<11>2014
16:25 Aug 26, 2021
Jkt 253001
ASI is replaced. 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.
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 the unsafe
condition described previously is likely
to exist or develop on other products of
the same type design.
Proposed AD Requirements in This
NPRM
This proposed AD would require a
one-time inspection of the ASI markings
and, depending on findings, either
replacing the ASI before further flight or
amending the existing AFM until the
ASI is replaced within 3 months.
Costs of Compliance
The FAA estimates that this AD, if
adopted as proposed, would affect 20
gliders of U.S. registry. The FAA
estimates that it would take about 0.5
work-hour per glider to comply with the
inspection requirements of this AD. 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 $850 or $42.50 per
glider.
The FAA estimates that amending the
AFM to insert and then remove the
temporary page as a result of the
inspection would take about 1 workhour per glider for a total cost of $85 per
glider. The FAA estimates that replacing
the ASI would take about 3.5 workhours and require parts costing $603, for
a total cost of $900.50 per glider. The
FAA has no way of determining the
number of gliders that may need these
actions.
The FAA has included all known
costs in its cost estimate. According to
the manufacturer, however, some of the
costs of this AD may be covered under
warranty, thereby reducing the cost
impact on affected operators.
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
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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
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
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:
■
Stemme AG: Docket No. FAA–2021–0716;
Project Identifier 2019–CE–023–AD.
(a) Comments Due Date
The FAA must receive comments on this
airworthiness directive (AD) by October 12,
2021.
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Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules
(b) Affected ADs
None.
of the local flight standards district office/
certificate holding district office.
(c) Applicability
This AD applies to Stemme AG Model
Stemme S 12 gliders, all serial numbers,
certificated in any category.
(i) 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 Union Aviation
Safety Agency (EASA) AD 2019–0082, dated
April 12, 2019, for more information. You
may examine the EASA AD in the AD docket
at https://www.regulations.gov by searching
for and locating it in Docket No. FAA–2021–
0716.
(3) For service information identified in
this AD, contact STEMME AG,
Flugplatzstrasse F2, Nr. 6–7, D–15344
Strausberg, Germany; phone: +49 (0) 3341
3612–0, fax: +49 (0) 3341 3612–30; email:
airworthiness@stemme.de; website: https://
www.stemme.com. 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.
(d) Subject
Joint Aircraft System Component (JASC)
Code 3414, Airspeed/Mach Indicator.
(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 an airspeed
indicator (ASI) with speed markings
inconsistent with the approved and
published values (beginning of the white and
green arc). The FAA is issuing this AD to
prevent erroneous information being
provided to the pilot, particularly at the
lower speed operation limits. The unsafe
condition, if not addressed, could result in
reduced control of the glider.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
lotter on DSK11XQN23PROD with PROPOSALS1
(g) Required Actions
(1) Within 30 days after the effective date
of this AD, inspect ASI part number (P/N) IF–
W230 or IF–W190 for incorrect markings in
accordance with the table in the Appendix,
‘‘2.3. Airspeed Indicator Markings,’’ of
Stemme Service Bulletin No. P062–980027,
Revision 00, dated December 17, 2018 (the
SB). If an ASI marking is incorrect, before
further flight, perform one of the following:
(i) Replace the ASI by following the
Actions, Action 2, of the SB; or
(ii) Amend the existing aircraft flight
manual (AFM) for your glider by inserting
the Appendix, temporary page 2–3 SB, ‘‘2.3.
Airspeed Indicator Markings,’’ of the SB.
Within 3 months after amending the AFM,
replace the ASI by following the Actions,
Action 2, of the SB and remove temporary
page 2–3 SB, ‘‘2.3. Airspeed Indicator
Markings,’’ from the AFM.
(2) As of the effective date of this AD, do
not install ASI P/N IF–W230 or IF–W190 on
any glider unless it has passed the inspection
required by this AD.
(h) 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 Related Information or email: 9AVS-AIR-730-AMOC@faa.gov.
(2) Before using any approved AMOC,
notify your appropriate principal inspector,
or lacking a principal inspector, the manager
VerDate Sep<11>2014
16:25 Aug 26, 2021
Jkt 253001
Issued on August 20, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–18387 Filed 8–26–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2021–0714; Project
Identifier 2019–CE–016–AD]
RIN 2120–AA64
Airworthiness Directives; ASI Aviation
(Type Certificate Previously Held by
Reims Aviation S.A.) Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
The FAA proposes to adopt a
new airworthiness directive (AD) for all
ASI Aviation (type certificate previously
held by Reims Aviation S.A.) Model
F406 airplanes. This proposed 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 failure of a circuit breaker
(CB) switch. This proposed AD would
require replacing certain CB switches
and establishing a life limit for the CB
SUMMARY:
PO 00000
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48067
switches. 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 October 12,
2021.
ADDRESSES: You may send comments,
using the procedures found in 14 CFR
11.43 and 11.45, by any of the following
methods:
• Federal eRulemaking Portal: Go to
https://www.regulations.gov. Follow the
instructions for submitting comments.
• Fax: (202) 493–2251.
• 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.
• 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 ASI Aviation,
Ae´rodrome de Reims Prunay, 51360
Prunay, France; telephone: +33 3 26 48
46 84; fax: +33 3 26 49 18 57; email:
contact@asi-aviation.fr; website: https://
asi-aviation.fr/page-Accueil.html. You
may view this service information at the
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
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0714; 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:
Gregory Johnson, Aviation Safety
Engineer, AIR–732 International
Validation Section FAA, 901 Locust,
Room 301, Kansas City, MO 64106–
2641; phone: (720) 626–5462; email:
gregory.johnson@faa.gov.
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–2021–0714; Project Identifier
2019–CE–016–AD’’ at the beginning of
your comments. The most helpful
comments reference a specific portion of
E:\FR\FM\27AUP1.SGM
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]]>Agencies
[Federal Register Volume 86, Number 164 (Friday, August 27, 2021)]
[Proposed Rules]
[Pages 48065-48067]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-18387]
=======================================================================
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0716; Project Identifier 2019-CE-023-AD]
RIN 2120-AA64
Airworthiness Directives; Stemme AG Gliders
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------
SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for all Stemme AG Model Stemme S 12 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 an airspeed indicator (ASI) with speed markings
inconsistent with the approved and published values. This proposed AD
would require inspecting the ASI markings and, depending on findings,
either replacing the ASI or amending the existing aircraft flight
manual (AFM) until the ASI is replaced. 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 October 12,
2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
Fax: (202) 493-2251.
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.
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 STEMME AG,
Flugplatzstrasse F2, Nr. 6-7, D-15344 Strausberg, Germany; phone: +49
(0) 3341 3612-0, fax: +49 (0) 3341 3612-30; email:
[email protected]; website: https://www.stemme.com. 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 https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0716; 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:
[email protected].
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-2021-0716; Project Identifier
2019-CE-023-AD'' 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
https://www.regulations.gov, including any 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
[[Page 48066]]
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, 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 2019-0082, dated April 12, 2019 (referred to after this as
``the MCAI''), to address an unsafe condition on Stemme AG Model Stemme
S 12 gliders. The MCAI states:
During a production inspection of a new powered sailplane, an
ASI was found with speed markings inconsistent with the approved and
published values (begin[ning] of the white and green arc).
Subsequent investigation of the production records for delivered
Stemme S 12 powered sailplanes does not exclude that a similar, non-
conforming ASI was installed during production.
This condition, if not corrected, could lead to erroneous
information being provided to the pilot, particularly at the lower
speed operation limits, possibly resulting in reduced control of the
powered sailplane.
To address this unsafe condition, Stemme AG issued the SB
[service bulletin] to provide inspections instructions.
For the reason described above, this [EASA] AD requires a one-
time inspection of the markings of the affected part and, depending
on findings, amending the Aircraft Flight Manual (AFM) and replacing
the affected part. This [EASA] AD also prohibits installation of
affected parts.
You may examine the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0716.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Stemme Service Bulletin No. P062-980027, Revision
00, dated December 17, 2018. The service information specifies checking
the ASI markings and provides illustrations of correct markings. The
service information specifies the procedure to replace an affected ASI
with an ASI with correct markings. The service information also
includes a temporary page to insert into the AFM until the ASI is
replaced. 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.
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 the unsafe condition described previously is likely
to exist or develop on other products of the same type design.
Proposed AD Requirements in This NPRM
This proposed AD would require a one-time inspection of the ASI
markings and, depending on findings, either replacing the ASI before
further flight or amending the existing AFM until the ASI is replaced
within 3 months.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 20 gliders of U.S. registry. The FAA estimates that it would
take about 0.5 work-hour per glider to comply with the inspection
requirements of this AD. 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 $850 or $42.50 per glider.
The FAA estimates that amending the AFM to insert and then remove
the temporary page as a result of the inspection would take about 1
work-hour per glider for a total cost of $85 per glider. The FAA
estimates that replacing the ASI would take about 3.5 work-hours and
require parts costing $603, for a total cost of $900.50 per glider. The
FAA has no way of determining the number of gliders that may need these
actions.
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
affected operators.
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
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:
Stemme AG: Docket No. FAA-2021-0716; Project Identifier 2019-CE-023-
AD.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by October 12, 2021.
[[Page 48067]]
(b) Affected ADs
None.
(c) Applicability
This AD applies to Stemme AG Model Stemme S 12 gliders, all
serial numbers, certificated in any category.
(d) Subject
Joint Aircraft System Component (JASC) Code 3414, Airspeed/Mach
Indicator.
(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 an airspeed
indicator (ASI) with speed markings inconsistent with the approved
and published values (beginning of the white and green arc). The FAA
is issuing this AD to prevent erroneous information being provided
to the pilot, particularly at the lower speed operation limits. The
unsafe condition, if not addressed, could result in reduced control
of the glider.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Within 30 days after the effective date of this AD, inspect
ASI part number (P/N) IF-W230 or IF-W190 for incorrect markings in
accordance with the table in the Appendix, ``2.3. Airspeed Indicator
Markings,'' of Stemme Service Bulletin No. P062-980027, Revision 00,
dated December 17, 2018 (the SB). If an ASI marking is incorrect,
before further flight, perform one of the following:
(i) Replace the ASI by following the Actions, Action 2, of the
SB; or
(ii) Amend the existing aircraft flight manual (AFM) for your
glider by inserting the Appendix, temporary page 2-3 SB, ``2.3.
Airspeed Indicator Markings,'' of the SB. Within 3 months after
amending the AFM, replace the ASI by following the Actions, Action
2, of the SB and remove temporary page 2-3 SB, ``2.3. Airspeed
Indicator Markings,'' from the AFM.
(2) As of the effective date of this AD, do not install ASI P/N
IF-W230 or IF-W190 on any glider unless it has passed the inspection
required by this AD.
(h) 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 Related Information or email:
[email protected].
(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.
(i) 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:
[email protected].
(2) Refer to European Union Aviation Safety Agency (EASA) AD
2019-0082, dated April 12, 2019, for more information. You may
examine the EASA AD in the AD docket at https://www.regulations.gov
by searching for and locating it in Docket No. FAA-2021-0716.
(3) For service information identified in this AD, contact
STEMME AG, Flugplatzstrasse F2, Nr. 6-7, D-15344 Strausberg,
Germany; phone: +49 (0) 3341 3612-0, fax: +49 (0) 3341 3612-30;
email: [email protected]; website: https://www.stemme.com. 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 August 20, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-18387 Filed 8-26-21; 8:45 am]
BILLING CODE 4910-13-P
