8158 Federal Register / Vol. 87, No. 30 / Monday, February 14, 2022 / Rules and Regulations 
Des Moines, WA 98198; phone and fax: 206– 
231–3165; email: dean.r.thompson@faa.gov. 
(3) For service information identified in 
this AD that is not incorporated by reference, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110 SK57, Seal Beach, CA 90740–5600; telephone 562–797–1717; internet https://www.myboeingfleet.com. 
(j) Material Incorporated by Reference 
None. 
Issued on February 7, 2022. 
Lance T. Gant, 
Director, Compliance & Airworthiness 
Division, Aircraft Certification Service. 
[FR Doc. 2022–03144 Filed 2–10–22; 11:15 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 39 
[Docket No. FAA–2021–0715; Project 
Identifier AD–2021–00259–A; Amendment 39–21932; AD 2022–03–15] 
RIN 2120–AA64 
Airworthiness Directives; Various 
Airplanes 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final rule. 
SUMMARY : The FAA is adopting a new 
airworthiness directive (AD) for various airplanes modified with certain configurations of Garmin G3X Touch Electronic Flight Instrument System installed per Supplemental Type Certificate (STC) No. SA01899WI or Garmin GI 275 Multi-Function Display (MFD) installed per STC No. SA02658SE. This AD was prompted by a report of a fuel quantity disparity between the amount of fuel indicated and the actual amount of fuel. This AD requires modifying the resistive fuel probe interface. The FAA is issuing this AD to address the unsafe condition on these products. 
DATES : This AD is effective March 21, 
2022. 
The Director of the Federal Register 
approved the incorporation by reference of certain publications listed in this AD as of March 21, 2022. 
ADDRESSES : For service information 
identified in this final rule, contact Garmin International, Garmin Aviation Support, 1200 E 151st Street, Olathe, KS 66062; phone: (866) 739–5687; email: avionics@garmin.com; website: https://
fly.garmin.com/fly-garmin/support/. 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 (817) 222– 5110. It is also available at https://www.regulations.gov by searching for 
and locating Docket No. FAA–2021– 0715. 
Examining the AD Docket 
You may examine the AD docket at 
https://www.regulations.gov by 
searching for and locating Docket No. 
FAA–2021–0715; 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, 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 : 
Kevin Marks, Aviation Safety Engineer, Wichita ACO Branch, FAA, 1801 Airport Road, Wichita, KS 67209; phone: (316) 946–4153; email: kevin.marks@faa.gov or Wichita-COS@
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 various airplanes modified with certain configurations of Garmin G3X Touch Electronic Flight Instrument System installed per STC No. SA01899WI or Garmin GI 275 MFD installed per STC No. SA02658SE. The NPRM published in the Federal Register on August 27, 2021 (86 FR 
48070). The NPRM was prompted by notification of a Piper production line issue with the installation of a Garmin G3X Touch Electronic Flight Instrument System installed under STC No. SA01899WI. After calibration and fueling the airplane to a known level, the flight crew noted that the fuel quantity indicator displayed a higher level of fuel. 
The Garmin G3X Touch Electronic 
Flight Instrument System, when interfaced with the Garmin GEA 24 (Engine Airframe Adapter) for display of the fuel quantity, uses a 1K ohm resistor inline between the GEA 24 and the airplane fuel quantity resistance style sending unit (float). This resistor provides lightning protection to the fuel tank as required by 14 CFR 23.954. 
Use of the 1K resistor causes a GEA 
error when the GEA 24 or resistor is subjected to significantly hotter or colder temperatures than the temperature at which the fuel gauges were calibrated during installation. The farther the actual (ambient) temperature of the GEA 24 or resistor is from the temperature of the fuel quantity calibration, the larger the error. The lower the operating resistance of the fuel sending unit, the larger the error. The largest errors occur in installations with fuel sending units having an operational range less than 100 ohms. The Garmin GI 275 MFDs installed under STC No. SA02658SE, when interfaced with the Garmin GEA 24 for display of the fuel quantity, is also subject to this unsafe condition. 
The displayed fuel quantity can have 
an error as much as four gallons/fuel tank with the display indicating four gallons with an empty tank. In the NPRM, the FAA proposed to require modifying the resistive fuel probe interface. The FAA is issuing this AD to prevent fuel starvation and engine shutdown, which could result in the inability to arrive at the destination airport or a suitable alternative airport. 
Discussion of Final Airworthiness 
Directive 
Comments 
The FAA received comments from 
Garmin. The following presents the 
comments received on the NPRM and the FAA’s response to each comment. 
Requests Regarding Background 
Information 
Garmin requested the FAA correct 
certain information in the preamble. In the NPRM, the FAA stated that use of the 1K resistor causes a GEA error when the resistor temperature changes. According to Garmin, using the 1K resistor causes a GEA error when the GEA 24 temperature changes. Garmin further noted that 1k resistors are installed near the GEA 24 plug and are exposed to the same ambient temperatures. 
The FAA agrees with correcting the 
preamble and has changed this final rule to clarify that a GEA error results from the GEA 24 being subjected to significantly hotter or colder temperatures than the temperature at which the fuel gauges were calibrated during installation. The FAA disagrees with the requested changes regarding the location of the resistors. The commenter’s request is not supported by the information in the installation manual, which does not require the resistor to be installed near the GEA 24. 
Garmin also requested that the FAA 
remove the exact error amount (i.e., four 
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gallons) between the displayed fuel 
quantity and the actual amount of fuel. Garmin stated that due to variations in different aircraft system configurations, this amount could be misleading. 
Removing the reference to 4 gallons 
would minimize the potential magnitude of the error and the need for AD action. The FAA did not change this AD based on this comment. 
Garmin noted a typographical error in 
that the NPRM referred to ‘‘MFDS’’ instead of ‘‘MFDs.’’ 
The FAA agrees and has corrected all 
references to MFDs accordingly. 
Request Regarding Unsafe Condition 
Garmin requested that the FAA 
change the description of the inevitable 
consequence of the unsafe condition. In the NPRM, the FAA stated the unsafe condition, if not addressed, could result in fuel starvation and engine shutdown with consequent loss of airplane control. Garmin stated that this incorrectly implies that loss of airplane control is the inevitable consequence of fuel starvation and engine shutdown. Garmin requested the FAA revise the preamble to state that loss of airplane control is one of many possible outcomes. 
The FAA agrees that loss of control is 
not an inevitable result of fuel starvation. In the context of this event, the end level effect is the loss of powered flight to the destination airport. Accordingly, the FAA has revised the background section of the preamble and the unsafe condition paragraph of the AD to reflect that fuel starvation and engine shutdown could result in the inability to arrive at the destination airport or a suitable 
alternative airport. 
Request Regarding Applicability 
Garmin requested the FAA revise the 
AD to remove several airplane models 
that are not subject to the unsafe condition. Garmin listed these models as follows: The Boeing Company Model AT–6 (Navy SNJ–2), AT–6A (Navy SNJ– 3), AT–6B, AT–6C (Navy SNJ–4), AT– 6D (Navy SNJ–5), AT–6F (Navy SNJ–6), BC- 1A, Navy SNJ–7, and T–6G; Cessna Aircraft Company Model T–50 (Army AT–17 and UC–78 series, Navy JRC–1); Costruzioni Aeronautiche Tecnam S.P.A. Model P2006T; Daher Aircraft Design, LLC (type certificate previously held by Quest Aircraft Design, LLC) Model Kodiak 100; EADS–PZL Warszawa-Oke ˛cie S.A. Model PZL–104 
Wilga 80; Helio Alaska, Inc. Model H– 800; Howard Aircraft Foundation Model DGA–15J (Army UC–70B), DGA–15P (Army UC–70, Navy GH–1, GH–2, GH– 3, NH–1), and DGA–15W; Textron Aviation Inc. Model G17S; Thrush Aircraft, LLC Model 600 S–2D, S2R, S2R–R1340, S2R-Rl820, S2R–R3S, and S2R–T34; and Waco Aircraft Company Model YMF airplanes. 
The FAA agrees and has revised the 
list of applicable models accordingly. 
Conclusion 
The FAA reviewed the relevant data, 
considered any comments received, 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. Except for the changes described previously, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator. 
Related Service Information Under 1 
CFR Part 51 
The FAA reviewed Garmin 
Mandatory STC Service Bulletin 2134, Revision A, and Garmin Mandatory STC Service Bulletin 2135, Revision A, both dated April 23, 2021. This service information specifies procedures for modifying the GEA 24 resistive fuel probe interface. These documents are distinct since they apply to different STCs. 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 the 
ADDRESSES section. 
Other Related Service Information 
The FAA also reviewed Master 
Drawing List (MDL) Document No. 005– 01320–00, Revision 10, for STC No. SA01899WI; and MDL Drawing No. 005–01208–41, Revision 10, for STC No. SA02658SE; both dated April 23, 2021. This service information contains the type design data for installation of the STC. MDL Document No. 005–01320– 00, Revision 10, dated April 23, 2021, introduces a new fuel quantity interface and configuration to eliminate the unsafe condition described previously. 
Costs of Compliance 
The FAA estimates that this AD 
affects 920 airplanes of U.S. registry. 
The FAA estimates the following 
costs to comply with this AD: 
ESTIMATED COSTS  
Action Labor cost Parts cost Cost per 
airplane Cost on U.S. 
operators 
Modify fuel probe interface and recalibrate 
the fuel system.8 work-hours × $85 per hour = $680 ............. $10 $690 $634,800 
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 
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 
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(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. 
§ 39.13 [Amended] 
■2. The FAA amends § 39.13 by adding 
the following new airworthiness directive: 
2022–03–15 Various Airplanes: 
Amendment 39–21932; Docket No. 
FAA–2021–0715; Project Identifier AD– 2021–00259–A. 
(a) Effective Date 
This airworthiness directive (AD) is 
effective March 21, 2022. 
(b) Affected ADs 
None. 
(c) Applicability 
This AD applies to all serial numbers of the 
airplane models listed in table 1 to paragraph 
(c), certificated in any category, that are either: (1) Modified with a Garmin G3X Touch 
Electronic Flight Instrument System under 
Supplemental Type Certificate (STC) No. SA01899WI, installed in accordance with Master Drawing List (MDL) Document No. 005–01320–00, Revision 9 or earlier, interfaced with a Garmin Engine Adapter GEA 24 connected to resistive fuel probes; or 
(2) Modified with a Garmin GI 275 Multi- 
Function Display under STC No. SA02658SE, installed in accordance with MDL Revision 9 or earlier, interfaced with a Garmin Engine 
Adapter GEA 24 connected to resistive fuel probes. 
Note 1 to paragraph (c): Garmin 
Mandatory STC Service Bulletin No. 2134, Revision A, and Garmin Mandatory STC Service Bulletin No. 2135, Revision A, both dated April 23, 2021, contain information for how to determine if your airplane has a resistive probe interface. 
BILLING CODE 4910–13–P 
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BILLING CODE 4910–13–C 
(d) Subject 
Joint Aircraft System Component (JASC) 
Code 2841, Fuel Quantity Indicator. 
(e) Unsafe Condition 
This AD was prompted by reports of fuel 
quantity disparities between the amount of 
fuel indicated and the actual amount of fuel. The FAA is issuing this AD to ensure that the amount of fuel indicated is the amount of fuel available. The unsafe condition, if not addressed, could result in fuel starvation and engine shutdown which could result in the inability to arrive at the destination airport or a suitable alternative airport. 
(f) Compliance 
Comply with this AD within the 
compliance times specified, unless already 
done. 
(g) Action 
Within 100 hours time-in-service after the 
effective date of this AD or within 12 months 
after the effective date of this AD, whichever occurs first, modify the fuel probe interface by following the Modification Instructions in Garmin Mandatory STC Service Bulletin 2134, Revision A, or Garmin Mandatory STC Service Bulletin 2135, Revision A, both dated April 23, 2021, whichever is applicable. (h) Alternative Methods of Compliance 
(AMOCs) 
(1) The Manager, Wichita ACO 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 (i) of this AD. 
(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 
For more information about this AD, 
contact Kevin Marks, Aviation Safety 
Engineer, Wichita ACO Branch, FAA, 1801 Airport Road, Wichita, KS 67209; phone: (316) 946–4153; email: kevin.marks@faa.gov or Wichita-COS@faa.gov. 
(j) 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) Garmin Mandatory STC Service Bulletin 
2134, Revision A, dated April 23, 2021. 
(ii) Garmin Mandatory STC Service 
Bulletin 2135, Revision A, dated April 23, 2021. 
(3) For service information identified in 
this AD, contact Garmin International, Garmin Aviation Support, 1200 E 151st Street, Olathe, KS 66062; phone: (866) 739– 5687; email: avionics@garmin.com; website: 
https://fly.garmin.com/fly-garmin/support/. 
(4) 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 (817) 222–5110. 
(5) You may view this service information 
that is incorporated by reference 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. 
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Issued on January 25, 2022. 
Lance T. Gant, 
Director, Compliance & Airworthiness 
Division, Aircraft Certification Service. 
[FR Doc. 2022–03000 Filed 2–11–22; 8:45 am] 
BILLING CODE 4910–13–P 
DEPARTMENT OF TRANSPORTATION 
Federal Aviation Administration 
14 CFR Part 39 
[Docket No. FAA–2021–0667; Project 
Identifier MCAI–2021–00580–T; Amendment 39–21931; AD 2022–03–14] 
RIN 2120–AA64 
Airworthiness Directives; Airbus SAS 
Airplanes 
AGENCY : Federal Aviation 
Administration (FAA), DOT. 
ACTION : Final rule. 
SUMMARY : The FAA is adopting a new 
airworthiness directive (AD) for certain Airbus SAS Model A350–941 and –1041 airplanes. This AD was prompted by a report that during type certification activity, it was identified that certain monitoring software was incorrectly implemented in the braking control system (BCS) certification standard. This AD requires installing (updating) certain software for the braking and steering system, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. 
DATES : This AD is effective March 21, 
2022. 
The Director of the Federal Register 
approved the incorporation by reference of a certain publication listed in this AD as of March 21, 2022. 
ADDRESSES : For material incorporated 
by reference (IBR) in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may 
find this IBR material on the EASA website at https://ad.easa.europa.eu. You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206–231–3195. It is also available in the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA–2021–0667. Examining the AD Docket 
You may examine the AD docket at 
https://www.regulations.gov by 
searching for and locating Docket No. 
FAA–2021–0667; 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 mandatory continuing airworthiness information (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 : Dan 
Rodina, Aerospace Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200 South 
216th St., Des Moines, WA 98198; telephone and fax 206–231–3225; email dan.rodina@faa.gov. 
SUPPLEMENTARY INFORMATION : 
Background 
EASA, which is the Technical Agent 
for the Member States of the European Union, has issued EASA AD 2021–0127, dated May 12, 2021 (EASA AD 2021– 0127) (also referred to as the MCAI), to correct an unsafe condition for certain Airbus SAS Model A350–941 and –1041 airplanes. 
The FAA issued a notice of proposed 
rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Airbus SAS Model A350–941 and –1041 airplanes. The NPRM published in the Federal Register on August 18, 2021 (86 FR 
46164). The NPRM was prompted by a report that during type certification activity, it was identified that certain monitoring software was incorrectly implemented in the BCS certification standard. The NPRM proposed to require installing (updating) certain software for the braking and steering system, as specified in EASA AD 2021– 0127. 
The FAA is issuing this AD to address 
in-service limitations related to the braking and steering system, which, under specific degraded conditions, could lead to a reduction in braking performance and potentially lead to a runway excursion, and result in damage to the airplane and injury to passengers. See the MCAI for additional background information. 
Discussion of Final Airworthiness 
Directive 
Comments 
The FAA received comments from 
Delta Airlines (DAL) and the Air Line Pilots Association, International 
(ALPA). ALPA supported the NPRM without change. The following presents the DAL comments received on the NPRM and the FAA’s response to each comment. 
Request To Revise the Costs of 
Compliance Paragraph 
DAL requested that the NPRM include 
the labor hours associated with the prerequisite service bulletins referenced in Airbus Service Bulletin A350–32– P037, dated July 30, 2019 (which is referenced in EASA AD 2021–0127). DAL stated that, depending on airplane configuration, the actions in the four prerequisite service bulletins may need to be done before doing the actions specified in referenced Airbus Service Bulletin A350–32–P037, dated July 30, 2019. 
The FAA acknowledges the 
commenter’s request. If an operator accomplishes prerequisite service information specified in Airbus Service Bulletin A350–32–P037, dated July 30, 2019 (which is referenced in EASA AD 2021–0127) there is an additional cost to those prerequisite service information. It is estimated that an operator may incur an additional 15 work-hours and up to an additional $1,275 in parts cost to accomplish the prerequisite service information. However, since accomplishment of the prerequisite service information may not be required 
to accomplish the required actions of this AD, these costs may not apply to all operators. The FAA has added this explanation to the Cost of Compliance paragraph in this AD, but not the additional costs for accomplishing the prerequisite service information. 
Request To Add a Certain AD to 
Paragraph (b) of the Proposed AD 
DAL requested that the FAA add AD 
2017–18–18, Amendment 39–19027 (82 FR 42579, September 11, 2017) (AD 2017–18–18) to paragraph (b) of the proposed AD (AD 2017–18–18 requires repetitive on-ground power cycles to reset the internal timer). DAL stated that Airbus Service Bulletin A350–42–P010, dated August 14, 2018, is a required prerequisite for doing the actions in Airbus Service Bulletin A350–32–P037, dated July 30, 2019 (which is referenced in EASA AD 2021–0127), and therefore, is a requirement for doing the actions in the proposed AD. DAL commented that Airbus Service Bulletin A350–42–P010, dated August 14, 2018, was approved for use in alternative method of compliance (AMOC) AIR–676–19–298, dated July 22, 2019, for accomplishing the requirements in paragraph (g) of AD 2017–18–18. 
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