Airworthiness Directives; Garmin International GMN-00962 GTS Processor Units, 18887-18890 [2021-07422]

Download as PDF khammond on DSKJM1Z7X2PROD with RULES Federal Register / Vol. 86, No. 68 / Monday, April 12, 2021 / Rules and Regulations (ii) Bombardier Global 5000 Aircraft Maintenance Manual, Part II, Publication No. BD–700 AMM, Revision 70, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control InputModule’’: (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input–Module— Removal/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (iii) Bombardier Global 5000 Featuring Global Vision Flight Deck Aircraft Maintenance Manual, Part II, Publication No. GL 5000 GVFD AMM, Revision 37, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control Input-Module’’: (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input-Module— Removal/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (iv) Bombardier Global 5500 Aircraft Maintenance Manual, Part II, Publication No. GL 5500 AMM, Revision 6, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control InputModule’’: (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input-Module— Removal/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (v) Bombardier Global 6000 Aircraft Maintenance Manual, Part II, Publication No. GL 6000 AMM, Revision 38, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control InputModule’’: (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input-Module— Removal/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (vi) Bombardier Global 6500 Aircraft Maintenance Manual, Part II, Publication No. GL 6500 AMM, Revision 7, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control InputModule’’: (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input-Module— Removal/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (vii) Bombardier Global Express XRS Aircraft Maintenance Manual, Part II, Publication No. BD–700 XRS AMM, Revision 67, dated February 22, 2021, Chapter 27, ‘‘Flight Controls,’’ Subject 27–11–13, ‘‘Roll Control Input-Module’’: VerDate Sep<11>2014 16:01 Apr 09, 2021 Jkt 253001 (A) Task 27–11–13–400–801, ‘‘Installation of the Roll Control Input-Module’’ (including Figure 401, ‘‘Roll Control Input-ModuleRemoval/Installation’’); (B) Task 27–11–13–720–801, ‘‘Functional Test of the Roll Control Input-Module’’; and (C) Task 27–11–13–820–801, ‘‘Adjustment of the Roll Control Input-Module.’’ (3) For service information identified in this AD, contact Bombardier, Inc., 400 CoˆteVertu Road West, Dorval, Que´bec H4S 1Y9, Canada; telephone 514–855–5000; fax 514– 855–7401; email ac.yul@ aero.bombardier.com; internet https:// www.bombardier.com. Note 7 to paragraph (l)(3): For obtaining the tasks for Bombardier Global Express Aircraft Maintenance Manual, Publication No. BD–700 AMM, use Document Identification No. GL 700 AMM. Note 8 to paragraph (l)(3): For obtaining the tasks for Bombardier Global 5000 Aircraft Maintenance Manual, Publication No. BD– 700 AMM, use Document Identification No. GL 5000 AMM. Note 9 to paragraph (l)(3): For obtaining the tasks for Bombardier Global Express XRS Aircraft Maintenance Manual, Publication No. BD–700 XRS AMM, use Document Identification No. GL XRS AMM. (4) You may view this service information 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. (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 fedreg.legal@nara.gov, or go to: https:// www.archives.gov/federal-register/cfr/ibrlocations.html. Issued on April 2, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–07536 Filed 4–8–21; 11:15 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2020–0991; Project Identifier AD–2020–00478–Q; Amendment 39–21509; AD 2021–08–15] RIN 2120–AA64 Airworthiness Directives; Garmin International GMN–00962 GTS Processor Units Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain SUMMARY: PO 00000 Frm 00005 Fmt 4700 Sfmt 4700 18887 Garmin International (Garmin) GMN– 00962 GTS processor units (GTS 825, GTS 855, GTS 8000). This AD was prompted by reports of GTS processor units issuing resolution advisories (RAs) when no risk of collision or loss of separation exists between the airplanes involved. This AD requires updating the software version of the affected GTS Processor units. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective May 17, 2021. 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; 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 St., 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–2020–0991; 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: Paul Rau, Aviation Safety Engineer, Wichita ACO Branch, FAA, 1801 Airport Road, Wichita, KS 67209; phone: (316) 946– 4149; fax: (316) 946–4107; email: paul.rau@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 Garmin GMN–00962 GTS processor units (GTS 825, GTS 855, GTS 8000) with part number 011–02571–0( ) and software version 3.13 or earlier (except version 3.12.1). The NPRM published in the Federal Register on December 14, 2020 (85 FR 80696). The NPRM was prompted by seven reports of false RAs involving aircraft equipped with Garmin GMN–00962 GTS processor configured for traffic collision avoidance system II (TCAS II) E:\FR\FM\12APR1.SGM 12APR1 18888 Federal Register / Vol. 86, No. 68 / Monday, April 12, 2021 / Rules and Regulations khammond on DSKJM1Z7X2PROD with RULES (configuration marketed as GTS–8000 units). The Garmin GMN–00962 GTS processor units are marketed by Garmin as the GTS 825, GTS 855 or GTS 8000, with the marketing name representing the traffic system configuration. A false RA occurs when there is no risk of collision or loss of separation of the airplanes. These false RAs result from the GTS Processor software potentially calculating incorrect range rates. This results in traffic advisories or RAs being generated when targets are greater than 10 nautical miles (NM) away. A TCAS event involving three or more airplanes can result in mid-air collision by increasing the risk that the TCAS, in resolving the false RA with the initial airplane, will create an actual loss of separation with a third airplane. This condition, if not addressed, could result in an RA being generated when no risk of loss of separation or risk of collision exists between the airplanes involved, which can lead to a mid-air collision with a third airplane. In the NPRM, the FAA proposed to require updating the GTS processor unit software. The FAA is issuing this AD to address the unsafe condition on these products. The affected GTS processor units were installed on the airplanes listed below during production and via an STC; however, the affected units may have been installed on other airplane models as a supplemental type certificate (STC). Although the names found in parenthesis may not be listed on the type certificate, the manufacturer may use those names as marketing names for the airplanes. • Textron Aviation Inc. (type certificate previously held by Cessna Aircraft Company) Model 525 (Cessna Citation M2), Model 525B (Cessna Citation CJ3+), Model Model 680 Sovereign, Model 680A Latitude, and Model 700 (Cessna Citation Longitude); • Embraer S.A. Model EMB–500 (Phenom 100) and Model EMB–505 (Phenom 300); • Learjet Inc. Model 45 (Learjet 70) and Model 45 (Learjet 75); and • Viking Air Limited (type certificate previously held by Shorts Brothers PLC, Shorts Brothers Limited) Model SD3–60 SHERPA, modified by Field Aerospace STC No. ST00865DE. Discussion of Final Airworthiness Directive Comments The FAA received comments from six commenters. The commenters were Garmin, Learjet Inc. (Learjet), Textron Aviation Inc. (Textron), NetJets, Field Aerospace, and an individual. The following presents the comments VerDate Sep<11>2014 16:01 Apr 09, 2021 Jkt 253001 received on the NPRM and the FAA’s response to each comment. Supportive An individual commenter supported the NPRM without change. Request Regarding Applicability Garmin requested the FAA clarify the AD applicability, as the proposed AD applies to GTS 825 and GTS 855, which are not affected by the false RA issue. Garmin suggested that the FAA add a clarifying statement to the background section, and revise the applicability paragraph to remove references to the GTS 825 and GTS 855. The FAA disagrees. This AD applies to the GTS Processor part number 011– 02571–0( ) units with software version 3.13 or earlier, except software version 3.12.1. The GTS 825, GTS 855, and GTS 8000 marketing labels describe different installation configurations rather than different appliances. While the GTS Processor will not generate false RAs when configured as TAS (GTS 825) or TCAS I (GTS 855), the appliance itself is still susceptible to the issue, and the unsafe condition would occur if an operator enables the TCAS II option without also updating the software. The FAA did not change this AD based on this comment. Request Regarding Affected Aircraft Field Aerospace stated that the proposed AD would affect Shorts Sherpa Model SD3–60 airplanes that have been modified under Field Aerospace STC No. ST00865DE. The FAA agrees with this comment. The FAA issued this AD against the Garmin appliance because the unsafe condition exists in the appliance. The FAA has added Model SD3–60 SHERPA airplanes modified by Field Aerospace STC No. ST00865DE to the list of known affected aircraft in the background section. This is not an allinclusive list; all operators must check their airplanes for the affected appliance, regardless of whether the model of their airplane is listed. Request Regarding Unsafe Condition Garmin requested the FAA add information relevant to the actual risk in the discussion of the unsafe condition in the background section. Specifically, Garmin stated that loss of separation with a third airplane is not inevitable when a false RA occurs. Garmin further stated that the TCAS II implemented by the GTS 8000 is capable of negotiating threats with more than one airplane and will adjust the RA in a situation should loss of separation to a third airplane result in a collision threat. PO 00000 Frm 00006 Fmt 4700 Sfmt 4700 The FAA disagrees. The unsafe condition statement describes the condition the FAA is trying to prevent; as such, it does not describe all possible outcomes. The FAA assessed the likelihood of the unsafe condition in determining whether an AD or other action was warranted. While the FAA acknowledges that no loss of separation event has been associated with this issue on Garmin equipment, a similar issue with other TCAS II equipment has resulted in loss of separation events. Additionally, the rate of false RAs observed with GTS Processor-equipped aircraft far exceeds the acceptable probability of a false RA due to a failure of the system specified in Advisory Circular No. 20–151C, Airworthiness Approval of Traffic Alert and Collision Avoidance Systems (TCAS II), Versions 7.0 & 7.1 and Associated Mode S Transponders, dated July 21, 2017. Further, the potential for a loss of separation is not limited to the GTS Processor-equipped aircraft, as the second aircraft may also contain equipment that attempts to resolve the multi-threat encounter. Although the TCAS II is capable of resolving conflicts with more than one aircraft, since the current design of TCAS RAs is limited to vertical maneuvers, it is not able to provide conflict resolution for all encounters involving multiple aircraft. The FAA did not change this AD based on this comment. Request Regarding Required Actions and Compliance Garmin requested the FAA revise the AD to require updating the affected software to version 3.12.1, or to version 3.14 or later. Garmin stated that, as proposed, the AD would not allow update of software to version 3.12.1, which is not affected by the issue. The FAA agrees with this comment. The unsafe condition is also resolved in version 3.12.1. The FAA has changed the Required Actions and Compliance paragraph to also allow updating the GTS processor software to version 3.12.1. Learjet, Textron, and NetJets requested the FAA extend the compliance time to allow adequate time for the certification and deployment of the required changes to all affected products. Learjet requested a compliance time of 18 months, while Textron requested a compliance time of 24 months. The FAA agrees. In addition to the reasons provided by the commenters, the FAA’s risk assessment, in consideration of the ongoing pandemic and resulting reduction in air traffic, E:\FR\FM\12APR1.SGM 12APR1 18889 Federal Register / Vol. 86, No. 68 / Monday, April 12, 2021 / Rules and Regulations supports extending the compliance time from 12 to 24 months. Request Regarding Costs Textron requested the FAA update the estimated cost information to include additional work for Textron aircraft. Textron stated it has prior agreements with Garmin to accomplish this software change as part of a package of other product improvements, for a peraircraft cost of approximately $3,000. The FAA disagrees with this comment. The cost analysis in AD rulemaking actions typically includes only the costs associated with complying with the AD. This AD does not mandate the entire package of changes for Textron aircraft. The FAA has not made changes to this AD based on this comment. Request Regarding Certificate of Airworthiness Learjet requested the FAA revise the AD to allow initial Certificates of Airworthiness to be issued to newlymanufactured aircraft prior to complying with the AD. Learjet stated that certification of new software to comply with the AD (software later than version 3.13) will take a minimum of 9 months. The FAA disagrees with this comment. The AD does not prohibit the issuance of a Certificate of Airworthiness to eligible aircraft. Newly-manufactured aircraft need to comply with the AD actions within the same timeframe as aircraft in the current U.S. fleet. The FAA has not made changes to this AD based on this comment. products. Except for minor editorial changes and any other changes described previously, this AD is adopted as proposed in the NPRM. None of the changes will increase the economic burden on any operator. Conclusion Costs of Compliance 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 The FAA estimates that this AD affects 700 appliances installed on airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: Related Service Information The FAA reviewed Garmin Service Bulletin No. 2065, Revision A, dated May 7, 2020; and Garmin Service Bulletin No. 1948, Revision B, dated March 26, 2020. These service bulletins contain procedures for uploading the software update to the GMN–00962 GTS Processor units (GTS 825, GTS 855, GTS 8000). ESTIMATED COSTS Action Labor cost Update GTS Processor software .................... 4.00 work-hours × $85 per hour = $340 ........ 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. khammond on DSKJM1Z7X2PROD with RULES 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 VerDate Sep<11>2014 16:01 Apr 09, 2021 Jkt 253001 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. PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 Cost per product Parts cost $0 § 39.13 $340 Cost on U.S. operators $238,000 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive: ■ 2021–08–15 Garmin International: Amendment 39–21509; Docket No. FAA–2020–0991; Project Identifier AD– 2020–00478–Q. (a) Effective Date This airworthiness directive (AD) is effective May 17, 2021. (b) Affected ADs None. (c) Applicability This AD applies to Garmin International GMN–00962 GTS processor units, part number 011–02571–0( ), with software version 3.13 or earlier, except software version 3.12.1, installed on airplanes certificated in any category. These units are marketed as the GTS 825, GTS 855, or GTS 8000. (d) Subject Joint Aircraft System Component (JASC) Code 3445, AIR COLLISION AVOIDANCE SYSTEM (TCAS). (e) Unsafe Condition This AD was prompted by the GTS processor unit issuing false resolution advisories (RAs) when no risk of collision or loss of separation exists between the airplanes involved. A traffic collision avoidance system (TCAS) event involving E:\FR\FM\12APR1.SGM 12APR1 18890 Federal Register / Vol. 86, No. 68 / Monday, April 12, 2021 / Rules and Regulations three or more airplanes can result in mid-air collision by increasing the risk that the TCAS, in resolving the false RA between the initial airplane, will create an actual loss of separation with a third airplane. The FAA is issuing this AD to prevent these false RAs, which can lead to a mid-air collision with a third airplane. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 71 [Docket No. FAA–2020–0823; Airspace Docket No. 20–AAL–49] (f) Required Action and Compliance Within 24 months after the effective date of this AD, update the GTS processor software to a version that is not 3.13 or earlier, except 3.12.1. Software version 3.12.1 does not contain the unsafe condition. (g) 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 Related Information. (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. (h) Related Information (1) For more information about this AD, contact Paul Rau, Aviation Safety Engineer, Wichita ACO Branch, FAA, 1801 Airport Road, Wichita, KS 67209; phone: (316) 946– 4149; fax: (316) 946–4107; email: paul.rau@ faa.gov or Wichita-COS@faa.gov. (2) For service information identified in this AD contact Garmin International, Garmin Aviation Support 1200 E. 151st Street, Olathe, KS 66062; phone: (866) 739– 5687; website: https://fly.garmin.com/flygarmin/support/. You may also view this service information at FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust St., Kansas City, MO 64106. For information on the availability of this material at the FAA, call (816) 329–4148. Issued on April 7, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–07422 Filed 4–9–21; 8:45 am] khammond on DSKJM1Z7X2PROD with RULES BILLING CODE 4910–13–P VerDate Sep<11>2014 16:01 Apr 09, 2021 Jkt 253001 RIN 2120–AA66 Amendment To Separate Terminal Airspace Areas From Norton Sound Low, Woody Island Low, Control 1234L, and Control 1487L Offshore Airspace Areas; Alaska Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: This action amends the following Offshore Airspace Areas in Alaska: Norton Sound Low, Woody Island Low, Control 1234L, and Control 1487L. The FAA found an error with the Offshore Airspace Legal Descriptions containing airspace descriptions not related to the need to apply IFR en route Air Traffic Control services in international airspace. This action corrects that error by removing terminal airspace, airspace associated with geographic coordinates, and airspace associated with NAVAIDs from the Offshore Airspace legal descriptions. DATES: Effective date 0901 UTC, June 17, 2021. The Director of the Federal Register approves this incorporation by reference action under 1 CFR part 51, subject to the annual revision of FAA Order 7400.11 and publication of conforming amendments. ADDRESSES: FAA Order 7400.11E, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at https:// www.faa.gov/air_traffic/publications/. For further information, you can contact the Rules and Regulations Group, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; telephone: (202) 267 8783. The Order is also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of FAA Order 7400.11E at NARA, email: fedreg.legal@nara.gov or go to https:// www.archives.gov/federal-register/cfr/ ibr-locations.html. FOR FURTHER INFORMATION CONTACT: Christopher McMullin, Rules and Regulations Group, Office of Policy, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; telephone: (202) 267–8783. SUPPLEMENTARY INFORMATION: SUMMARY: PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 Authority for This Rulemaking The FAA’s authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. 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. This rulemaking is promulgated under the authority described in Subtitle VII, Part A, Subpart I, Section 40103. Under that section, the FAA is charged with prescribing regulations to assign the use of the airspace necessary to ensure the safety of aircraft and the efficient use of airspace. This regulation is within the scope of that authority as it would correct the Offshore Airspace legal descriptions as necessary to preserve the safe and efficient flow of air traffic within the National Airspace System. History The FAA published a notice of proposed rulemaking for Docket No. FAA–2020–0823 in the Federal Register (85 FR 59220; September 21, 2020) reversing the final rule for Docket No. FAA–2006–25852 in the Federal Register (72 FR 31714; June 8, 2007; as corrected 72 FR 37430, July 10, 2007) that amended the offshore airspace areas, including: Norton Sound Low, Woody Island Low, Control 1234L, and Control 1487L Offshore Airspace Areas; Alaska, to include terminal airspace previously thought to be excluded in the Code of Federal Regulations. The exclusionary language was misinterpreted including all airspace West of Longitude 160°. The FAA found this interpretation to be in error, as the exclusion only pertains to the area West of Longitude 160° for the Alaskan Peninsula. The Alaskan Peninsula does not include the Aleutian Islands, nor preclude the establishment of airspace under CFR 71.71(c). Additionally, this final rule corrects the final rule for Docket No. FAA–2006–26164 in the Federal Register (72 FR 5611; February 7, 2007) that revoked Class E Airspace for Adak, ATKA, Cold Bay, Nelson Lagoon, Saint George Island, Sand Point, Shemya, St. Paul Island, and Unalaska, AK as it was thought that because these locations were within Control 1234L, they should be contained in the offshore airspace description. This was in error, as offshore airspace cannot be established within 12 nautical miles (NM) of a coastline of the United States (U.S.). This action corrects these errors. Interested parties were invited to participate in this rulemaking effort by submitting written comments on the E:\FR\FM\12APR1.SGM 12APR1

Agencies

[Federal Register Volume 86, Number 68 (Monday, April 12, 2021)]
[Rules and Regulations]
[Pages 18887-18890]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-07422]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2020-0991; Project Identifier AD-2020-00478-Q; 
Amendment 39-21509; AD 2021-08-15]
RIN 2120-AA64


Airworthiness Directives; Garmin International GMN-00962 GTS 
Processor Units

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Garmin International (Garmin) GMN-00962 GTS processor units 
(GTS 825, GTS 855, GTS 8000). This AD was prompted by reports of GTS 
processor units issuing resolution advisories (RAs) when no risk of 
collision or loss of separation exists between the airplanes involved. 
This AD requires updating the software version of the affected GTS 
Processor units. The FAA is issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective May 17, 2021.

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; 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 St., 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-2020-0991; 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: Paul Rau, Aviation Safety Engineer, 
Wichita ACO Branch, FAA, 1801 Airport Road, Wichita, KS 67209; phone: 
(316) 946-4149; fax: (316) 946-4107; email: [email protected] or 
[email protected].

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 Garmin GMN-00962 GTS 
processor units (GTS 825, GTS 855, GTS 8000) with part number 011-
02571-0( ) and software version 3.13 or earlier (except version 
3.12.1). The NPRM published in the Federal Register on December 14, 
2020 (85 FR 80696). The NPRM was prompted by seven reports of false RAs 
involving aircraft equipped with Garmin GMN-00962 GTS processor 
configured for traffic collision avoidance system II (TCAS II)

[[Page 18888]]

(configuration marketed as GTS-8000 units). The Garmin GMN-00962 GTS 
processor units are marketed by Garmin as the GTS 825, GTS 855 or GTS 
8000, with the marketing name representing the traffic system 
configuration.
    A false RA occurs when there is no risk of collision or loss of 
separation of the airplanes. These false RAs result from the GTS 
Processor software potentially calculating incorrect range rates. This 
results in traffic advisories or RAs being generated when targets are 
greater than 10 nautical miles (NM) away. A TCAS event involving three 
or more airplanes can result in mid-air collision by increasing the 
risk that the TCAS, in resolving the false RA with the initial 
airplane, will create an actual loss of separation with a third 
airplane. This condition, if not addressed, could result in an RA being 
generated when no risk of loss of separation or risk of collision 
exists between the airplanes involved, which can lead to a mid-air 
collision with a third airplane.
    In the NPRM, the FAA proposed to require updating the GTS processor 
unit software. The FAA is issuing this AD to address the unsafe 
condition on these products.
    The affected GTS processor units were installed on the airplanes 
listed below during production and via an STC; however, the affected 
units may have been installed on other airplane models as a 
supplemental type certificate (STC). Although the names found in 
parenthesis may not be listed on the type certificate, the manufacturer 
may use those names as marketing names for the airplanes.
     Textron Aviation Inc. (type certificate previously held by 
Cessna Aircraft Company) Model 525 (Cessna Citation M2), Model 525B 
(Cessna Citation CJ3+), Model Model 680 Sovereign, Model 680A Latitude, 
and Model 700 (Cessna Citation Longitude);
     Embraer S.A. Model EMB-500 (Phenom 100) and Model EMB-505 
(Phenom 300);
     Learjet Inc. Model 45 (Learjet 70) and Model 45 (Learjet 
75); and
     Viking Air Limited (type certificate previously held by 
Shorts Brothers PLC, Shorts Brothers Limited) Model SD3-60 SHERPA, 
modified by Field Aerospace STC No. ST00865DE.

Discussion of Final Airworthiness Directive Comments

    The FAA received comments from six commenters. The commenters were 
Garmin, Learjet Inc. (Learjet), Textron Aviation Inc. (Textron), 
NetJets, Field Aerospace, and an individual. The following presents the 
comments received on the NPRM and the FAA's response to each comment.

Supportive

    An individual commenter supported the NPRM without change.

Request Regarding Applicability

    Garmin requested the FAA clarify the AD applicability, as the 
proposed AD applies to GTS 825 and GTS 855, which are not affected by 
the false RA issue. Garmin suggested that the FAA add a clarifying 
statement to the background section, and revise the applicability 
paragraph to remove references to the GTS 825 and GTS 855.
    The FAA disagrees. This AD applies to the GTS Processor part number 
011-02571-0( ) units with software version 3.13 or earlier, except 
software version 3.12.1. The GTS 825, GTS 855, and GTS 8000 marketing 
labels describe different installation configurations rather than 
different appliances. While the GTS Processor will not generate false 
RAs when configured as TAS (GTS 825) or TCAS I (GTS 855), the appliance 
itself is still susceptible to the issue, and the unsafe condition 
would occur if an operator enables the TCAS II option without also 
updating the software.
    The FAA did not change this AD based on this comment.

Request Regarding Affected Aircraft

    Field Aerospace stated that the proposed AD would affect Shorts 
Sherpa Model SD3-60 airplanes that have been modified under Field 
Aerospace STC No. ST00865DE.
    The FAA agrees with this comment. The FAA issued this AD against 
the Garmin appliance because the unsafe condition exists in the 
appliance. The FAA has added Model SD3-60 SHERPA airplanes modified by 
Field Aerospace STC No. ST00865DE to the list of known affected 
aircraft in the background section. This is not an all-inclusive list; 
all operators must check their airplanes for the affected appliance, 
regardless of whether the model of their airplane is listed.

Request Regarding Unsafe Condition

    Garmin requested the FAA add information relevant to the actual 
risk in the discussion of the unsafe condition in the background 
section. Specifically, Garmin stated that loss of separation with a 
third airplane is not inevitable when a false RA occurs. Garmin further 
stated that the TCAS II implemented by the GTS 8000 is capable of 
negotiating threats with more than one airplane and will adjust the RA 
in a situation should loss of separation to a third airplane result in 
a collision threat.
    The FAA disagrees. The unsafe condition statement describes the 
condition the FAA is trying to prevent; as such, it does not describe 
all possible outcomes. The FAA assessed the likelihood of the unsafe 
condition in determining whether an AD or other action was warranted. 
While the FAA acknowledges that no loss of separation event has been 
associated with this issue on Garmin equipment, a similar issue with 
other TCAS II equipment has resulted in loss of separation events. 
Additionally, the rate of false RAs observed with GTS Processor-
equipped aircraft far exceeds the acceptable probability of a false RA 
due to a failure of the system specified in Advisory Circular No. 20-
151C, Airworthiness Approval of Traffic Alert and Collision Avoidance 
Systems (TCAS II), Versions 7.0 & 7.1 and Associated Mode S 
Transponders, dated July 21, 2017. Further, the potential for a loss of 
separation is not limited to the GTS Processor-equipped aircraft, as 
the second aircraft may also contain equipment that attempts to resolve 
the multi-threat encounter. Although the TCAS II is capable of 
resolving conflicts with more than one aircraft, since the current 
design of TCAS RAs is limited to vertical maneuvers, it is not able to 
provide conflict resolution for all encounters involving multiple 
aircraft.
    The FAA did not change this AD based on this comment.

Request Regarding Required Actions and Compliance

    Garmin requested the FAA revise the AD to require updating the 
affected software to version 3.12.1, or to version 3.14 or later. 
Garmin stated that, as proposed, the AD would not allow update of 
software to version 3.12.1, which is not affected by the issue.
    The FAA agrees with this comment. The unsafe condition is also 
resolved in version 3.12.1. The FAA has changed the Required Actions 
and Compliance paragraph to also allow updating the GTS processor 
software to version 3.12.1.
    Learjet, Textron, and NetJets requested the FAA extend the 
compliance time to allow adequate time for the certification and 
deployment of the required changes to all affected products. Learjet 
requested a compliance time of 18 months, while Textron requested a 
compliance time of 24 months.
    The FAA agrees. In addition to the reasons provided by the 
commenters, the FAA's risk assessment, in consideration of the ongoing 
pandemic and resulting reduction in air traffic,

[[Page 18889]]

supports extending the compliance time from 12 to 24 months.

Request Regarding Costs

    Textron requested the FAA update the estimated cost information to 
include additional work for Textron aircraft. Textron stated it has 
prior agreements with Garmin to accomplish this software change as part 
of a package of other product improvements, for a per-aircraft cost of 
approximately $3,000.
    The FAA disagrees with this comment. The cost analysis in AD 
rulemaking actions typically includes only the costs associated with 
complying with the AD. This AD does not mandate the entire package of 
changes for Textron aircraft.
    The FAA has not made changes to this AD based on this comment.

Request Regarding Certificate of Airworthiness

    Learjet requested the FAA revise the AD to allow initial 
Certificates of Airworthiness to be issued to newly-manufactured 
aircraft prior to complying with the AD. Learjet stated that 
certification of new software to comply with the AD (software later 
than version 3.13) will take a minimum of 9 months.
    The FAA disagrees with this comment. The AD does not prohibit the 
issuance of a Certificate of Airworthiness to eligible aircraft. Newly-
manufactured aircraft need to comply with the AD actions within the 
same timeframe as aircraft in the current U.S. fleet.
    The FAA has not made changes to this AD based on this comment.

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 minor editorial changes and any 
other 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

    The FAA reviewed Garmin Service Bulletin No. 2065, Revision A, 
dated May 7, 2020; and Garmin Service Bulletin No. 1948, Revision B, 
dated March 26, 2020. These service bulletins contain procedures for 
uploading the software update to the GMN-00962 GTS Processor units (GTS 
825, GTS 855, GTS 8000).

Costs of Compliance

    The FAA estimates that this AD affects 700 appliances installed on 
airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Update GTS Processor software.........  4.00 work-hours x $85                 $0            $340        $238,000
                                         per hour = $340.
----------------------------------------------------------------------------------------------------------------

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

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:

2021-08-15 Garmin International: Amendment 39-21509; Docket No. FAA-
2020-0991; Project Identifier AD-2020-00478-Q.

(a) Effective Date

    This airworthiness directive (AD) is effective May 17, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Garmin International GMN-00962 GTS processor 
units, part number 011-02571-0( ), with software version 3.13 or 
earlier, except software version 3.12.1, installed on airplanes 
certificated in any category. These units are marketed as the GTS 
825, GTS 855, or GTS 8000.

(d) Subject

    Joint Aircraft System Component (JASC) Code 3445, AIR COLLISION 
AVOIDANCE SYSTEM (TCAS).

(e) Unsafe Condition

    This AD was prompted by the GTS processor unit issuing false 
resolution advisories (RAs) when no risk of collision or loss of 
separation exists between the airplanes involved. A traffic 
collision avoidance system (TCAS) event involving

[[Page 18890]]

three or more airplanes can result in mid-air collision by 
increasing the risk that the TCAS, in resolving the false RA between 
the initial airplane, will create an actual loss of separation with 
a third airplane. The FAA is issuing this AD to prevent these false 
RAs, which can lead to a mid-air collision with a third airplane.

(f) Required Action and Compliance

    Within 24 months after the effective date of this AD, update the 
GTS processor software to a version that is not 3.13 or earlier, 
except 3.12.1. Software version 3.12.1 does not contain the unsafe 
condition.

(g) 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 Related Information.
    (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.

(h) Related Information

    (1) For more information about this AD, contact Paul Rau, 
Aviation Safety Engineer, Wichita ACO Branch, FAA, 1801 Airport 
Road, Wichita, KS 67209; phone: (316) 946-4149; fax: (316) 946-4107; 
email: [email protected] or [email protected].
    (2) For service information identified in this AD contact Garmin 
International, Garmin Aviation Support 1200 E. 151st Street, Olathe, 
KS 66062; phone: (866) 739-5687; website: https://fly.garmin.com/fly-garmin/support/. You may also view this service information at 
FAA, Airworthiness Products Section, Operational Safety Branch, 901 
Locust St., Kansas City, MO 64106. For information on the 
availability of this material at the FAA, call (816) 329-4148.

    Issued on April 7, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-07422 Filed 4-9-21; 8:45 am]
BILLING CODE 4910-13-P