Airworthiness Directives; Bell Textron Canada Limited Helicopters, 49909-49912 [2021-19049]

Download as PDF Federal Register / Vol. 86, No. 170 / Tuesday, September 7, 2021 / Rules and Regulations cracks would take about 0.5 work-hours for an estimated cost of $43 per inspection cycle. Installing each plastic bushing, coating with compound, re-installing the bellcrank, and applying torque would take about 0.5 work-hours and parts would cost about $10 for an estimated cost of $53 per helicopter. 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 helicopters 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. lotter on DSK11XQN23PROD with RULES1 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: VerDate Sep<11>2014 16:15 Sep 03, 2021 Jkt 253001 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: ■ 2021–19–04 He´licopte`res Guimbal: Amendment 39–21722; Docket No. FAA–2021–0498; Project Identifier 2019–SW–072–AD. (a) Effective Date This airworthiness directive (AD) is effective October 12, 2021. (b) Affected ADs None. (c) Applicability This AD applies to He´licopte`res Guimbal (HG) Model Cabri G2 helicopters, certificated in any category, with any metal bushings installed on the main rotor (M/R) swashplate guide bellcrank and without plastic bushing part number HG22–1001 or HG modification 16–009. (d) Subject Joint Aircraft Service Component (JASC) Code: 6700, Rotorcraft Flight Control. (e) Unsafe Condition This AD was prompted by a report of cracks on the M/R scissor link. The FAA is issuing this AD to replace the metal bushings installed on the M/R swashplate guide bellcrank with plastic bushings. The unsafe condition, if not addressed, could result in failure of the M/R swashplate guide bellcrank and reduced control of the helicopter. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Within 50 hours time-in-service (TIS) or 2 months, whichever occurs first after the effective date of this AD: (i) Disconnect the bellcrank from the swashplate guide by removing each bolt and, ensuring that the bellcrank remains attached to the flight control rod, remove each metal bushing from service using a bushing disassembly tool. (ii) Visually inspect the lug bore area for any corrosion and any cracks. If there is any corrosion or any cracks, before further flight, remove the swashplate guide from service or repair it using an FAA-approved method. If there is no corrosion and no cracks, install plastic bushing part number HG22–1001, coat plastic bushing with isolation compound, re-install the bellcrank, torque each bolt to 7.5 Nm–9 Nm (5.5 ft-lbs–6.6 ftlbs), and install cotter pins. (2) As of the effective date of this AD, do not install any metal bushing on any helicopter. PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 49909 (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 International Validation Branch, send it to the attention of the person identified in paragraph (i)(1) of this AD. Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov. (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 Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600 Stewart Ave, Suite 410, Westbury, NY 11590; telephone (516) 228–7330; email andrea.jimenez@faa.gov. (2) The subject of this AD is addressed in European Union Aviation Safety Agency (EASA) AD 2019–0185, dated July 30, 2019. You may view the EASA AD on the internet at https://www.regulations.gov in Docket No. FAA–2021–0498. (j) Material Incorporated by Reference None. Issued on August 30, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–19037 Filed 9–3–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0497; Project Identifier 2019–SW–043–AD; Amendment 39–21711; AD 2021–18–10] RIN 2120–AA64 Airworthiness Directives; Bell Textron Canada Limited Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 429 helicopters. This AD was prompted by three reports of unexpected forces or uncommanded inputs to the directional (yaw) control system. This AD requires revising the existing Rotorcraft Flight SUMMARY: E:\FR\FM\07SER1.SGM 07SER1 49910 Federal Register / Vol. 86, No. 170 / Tuesday, September 7, 2021 / Rules and Regulations Manual (RFM) for your helicopter. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective October 12, 2021. ADDRESSES: For service information identified in this final rule, contact Bell Textron Canada Limited, 12,800 Rue de l’Avenir, Mirabel, Quebec J7J1R4, Canada; telephone (450) 437–2862 or (800) 363–8023; fax (450) 433–0272; or at https://www.bellcustomer.com. You may view the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call (817) 222–5110. lotter on DSK11XQN23PROD with RULES1 Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0497; 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 Transport Canada AD, any comments received, and other information. The street 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: Mitch Soth, Flight Test Engineer, Southwest Section, Flight Test Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222– 5110; email mitch.soth@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 Bell Textron Canada Limited Model 429 helicopters, serial numbers 57001 and subsequent. The NPRM published in the Federal Register on July 7, 2021 (86 FR 35692). In the NPRM, the FAA proposed to require revising the existing RFM for your helicopter by adding procedures in Section 2, Normal Procedures, under 2– 4. INTERIOR AND PRESTART CHECK, 2–5. ENGINE START, and 2–8. TAKEOFF; Section 3, Emergency and Malfunction Procedures, under 3–9. AUTOMATIC FLIGHT CONTROL SYSTEM; and Section 4, Performance, under 4–2. POWER ASSURANCE CHECK. The owner/operator (pilot) may revise the existing RFM for your helicopter, and the owner/operator must VerDate Sep<11>2014 16:15 Sep 03, 2021 Jkt 253001 enter compliance with the applicable paragraphs of the AD into the aircraft records in accordance with § 43.9(a)(1) through (4) and § 91.417(a)(2)(v). This is an exception to the FAA’s standard maintenance regulations. The NPRM was prompted by Transport Canada Emergency AD CF– 2019–16, dated May 6, 2019 (Transport Canada AD CF–2019–16), issued by Transport Canada, which is the aviation authority for Canada to correct an unsafe condition for Bell Helicopter Textron Canada Limited (now Bell Textron Canada Limited) Model 429 helicopters, serial numbers 57001 and subsequent. Transport Canada advises of three reports of unexpected forces or uncommanded inputs to the directional (yaw) control system during ground operations. Investigation revealed that a yaw trim runaway can occur while the automatic pedal trim function is operating. This condition, if not addressed, could result in loss of control of the helicopter. Accordingly, Transport Canada AD CF–2019–16 requires revising Bell RFM BHT–429– FM–1 by incorporating revision 14, dated April 18, 2019. Discussion of Final Airworthiness Directive Comments The FAA received one comment from an individual who supported the NPRM without change. Conclusion These helicopters have been approved by the aviation authority of Canada and are approved for operation in the United States. Pursuant to the FAA’s bilateral agreement with Canada, Transport Canada, its technical representative, has notified the FAA of the unsafe condition described in its AD. The FAA reviewed the relevant data, considered the comment 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 helicopters. Related Service Information The FAA reviewed Section 2—Normal Procedures, Section 3—Emergency and Malfunction Procedures, and Section 4—Performance, of Bell RFM BHT–429– FM–1, Revision 14, dated April 18, 2019. This revision of the service information adds a procedure to reduce the risk of trim runaway during start sequence, cautions to reduce the risk of uncommanded control movement during engine start and takeoff and resetting force trim detent instructions during engine start and takeoff, and an emergency procedure to assist flight PO 00000 Frm 00008 Fmt 4700 Sfmt 4700 crew to recognize trim runaway and response instructions. Costs of Compliance The FAA estimates that this AD affects 120 helicopters of U.S. Registry. Labor rates are estimated at $85 per work-hour. Based on these numbers, the FAA estimates the following costs to comply with this AD. Revising the existing RFM for your helicopter takes about 0.50 work-hour for an estimated cost of $43 per helicopter and $5,160 for the U.S. fleet. 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 helicopters 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, E:\FR\FM\07SER1.SGM 07SER1 Federal Register / Vol. 86, No. 170 / Tuesday, September 7, 2021 / Rules and Regulations PART 39—AIRWORTHINESS DIRECTIVES (c) Applicability This AD applies to Bell Textron Canada Limited Model 429 helicopters, certificated in any category, serial numbers 57001 and subsequent. 1. The authority citation for part 39 continues to read as follows: (d) Subject Joint Aircraft Service Component (JASC) Code: 6720, Tail Rotor Control System. the FAA amends 14 CFR part 39 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: ■ 2021–18–10 Bell Textron Canada Limited: Amendment 39–21711; Docket No. FAA–2021–0497; Project Identifier 2019–SW–043–AD. (a) Effective Date This airworthiness directive (AD) is effective October 12, 2021. (e) Unsafe Condition This AD was prompted by three reports of unexpected forces or uncommanded inputs to the directional (yaw) control system. The FAA is issuing this AD to prevent yaw trim runaway. The unsafe condition, if not addressed, could result in loss of control of the helicopter. (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, revise the existing Rotorcraft Flight Manual for your helicopter as follows: (b) Affected ADs None. 49911 (i) In Section 2, Normal Procedures, under 2–4. INTERIOR AND PRESTART CHECK, add the following as item 25: ‘‘25. Depress the cyclic force TRIM REL button and collective FORCE REL button (4-axis only) to center actuators and extinguish any active out of detent indications.’’ (ii) In Section 2, Normal Procedures, under 2–5. ENGINE START and under 2–8. TAKEOFF, add the following above item 1: ‘‘CAUTION: WHEN MANIPULATING FLIGHT CONTROLS WITH FORCE TRIM SELECTED ON, DO NOT RELEASE AFFECTED FLIGHT CONTROL UNTIL THE OUT OF DETENT INDICATION EXTINGUISHES. THE FLIGHT CONTROLS MAY BE RESET BY DEPRESSING THE CYCLIC FORCE TRIM REL BUTTON AND COLLECTIVE FORCE REL BUTTON (4–AXIS ONLY) UNTIL THE OUT OF DETENT INDICATION EXTINGUISHES.’’ (iii) In Section 3, Emergency and Malfunction Procedures, under 3–9. AUTOMATIC FLIGHT CONTROL SYSTEM, add the information in Figure 1 to paragraph (g)(1)(iii) of this AD as item 3–9–D: 3-9-D. TRIM RUNAWAY • INDICATIONS: Flight controls - Uncommanded movement. Flight control forces - High in axis of uncommanded movement, normal in other axes. Out of detent indication for affected axis • PROCEDURE: 1. Cyclic force TRIM REL and/or collective FORCE REL button (4-axis only) - Depress until the out of detent indication extinguishes. 2. Flight controls - Do not release flight control if out of detent indication is present. 3. Force TRIM switch- OFF; check TRM OFF illuminates on PFD. 4. IfIMC, land as soon as practical. IfVMC, continue flight in SCAS. (iv) In Section 4, Performance, under 4–2. POWER ASSURANCE CHECK, add the following above the instructions for performing a power assurance check: ‘‘CAUTION: WHEN MANIPULATING FLIGHT CONTROLS WITH FORCE TRIM VerDate Sep<11>2014 16:15 Sep 03, 2021 Jkt 253001 SELECTED ON, DO NOT RELEASE AFFECTED FLIGHT CONTROL UNTIL THE OUT OF DETENT INDICATION EXTINGUISHES. THE FLIGHT CONTROLS MAY BE RESET BY DEPRESSING THE CYCLIC FORCE TRIM REL BUTTON AND PO 00000 Frm 00009 Fmt 4700 Sfmt 4700 COLLECTIVE FORCE REL BUTTON (4–AXIS ONLY) UNTIL THE OUT OF DETENT INDICATION EXTINGUISHES.’’ (2) Using a document with information identical to the information in paragraph (g)(1) of this AD is acceptable for compliance E:\FR\FM\07SER1.SGM 07SER1 ER07SE21.000</MATH> lotter on DSK11XQN23PROD with RULES1 Figure 1 to paragraph (g)(l )(iii) 49912 Federal Register / Vol. 86, No. 170 / Tuesday, September 7, 2021 / Rules and Regulations with the actions required by paragraph (g)(1) of this AD. (3) The actions required by paragraphs (g)(1) and (2) of this AD may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with § 43.9(a)(1) through (4) and § 91.417(a)(2)(v). The record must be maintained as required by § 91.417, § 121.380, or § 135.439. (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 International Validation Branch, send it to the attention of the person identified in paragraph (i)(1) of this AD. Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov. (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 Mitch Soth, Flight Test Engineer, Southwest Section, Flight Test Branch, Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone (817) 222–5110; email mitch.soth@faa.gov. (2) The subject of this AD is addressed in Transport Canada Emergency AD CF–2019– 16, dated May 6, 2019. You may view the Transport Canada AD on the internet at https://www.regulations.gov in Docket No. FAA–2021–0497. (j) Material Incorporated by Reference None. Issued on August 26, 2021. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–19049 Filed 9–3–21; 8:45 am] lotter on DSK11XQN23PROD with RULES1 BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0381; Project Identifier MCAI–2020–01656–E; Amendment 39–21694; AD 2021–17–11] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by RollsRoyce plc) Turbofan Engines Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Rolls-Royce Deutschland Ltd & Co KG (RRD) Trent XWB–75, Trent XWB–79, Trent XWB–79B, and Trent XWB–84 model turbofan engines. This AD was prompted by reports of cracks in the intermediate-pressure compressor (IPC) rotor 1 (R1) blades installed on certain Trent XWB model turbofan engines. This AD requires initial and repetitive borescope inspections (BSIs) of the affected IPC R1 blades and, depending on the results of the inspections, replacement of all 34 IPC R1 blades. The FAA is issuing this AD to address the unsafe condition on these products. DATES: This AD is effective October 12, 2021. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 12, 2021. ADDRESSES: For service information identified in this final rule, contact Rolls-Royce plc, Corporate Communications, P.O. Box 31, Derby, DE24 8BJ, United Kingdom; phone: +44 (0)1332 242424; fax: +44 (0)1332 249936; website: https://www.rollsroyce.com/contact-us.aspx. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 1200 District Avenue, Burlington, MA 01803. For information on the availability of this material at the FAA, call (781) 238– 7759. It is also available at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0381. SUMMARY: Examining the AD Docket You may examine the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0381; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal VerDate Sep<11>2014 16:15 Sep 03, 2021 Jkt 253001 PO 00000 Frm 00010 Fmt 4700 Sfmt 4700 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: Kevin Clark, Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: (781) 238–7088; fax: (781) 238–7199; email: kevin.m.clark@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 certain RRD Trent XWB–75, Trent XWB–79, Trent XWB–79B, and Trent XWB–84 model turbofan engines. The NPRM published in the Federal Register on May 28, 2021 (86 FR 28716). The NPRM was prompted by reports of cracks in the IPC R1 blades installed on certain Trent XWB model turbofan engines. The NPRM proposed to require initial and repetitive BSIs of the affected IPC R1 blades and, depending on the results of the inspections, replacement of all 34 IPC R1 blades with parts eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products. The European Union Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD 2020–0277, dated December 11, 2020 (referred to after this as ‘‘the MCAI’’), to address the unsafe condition on these products. The MCAI states: Occurrences have been reported of finding cracked IPC R1 blades on certain Trent XWB engines that were close to their first planned refurbishment shop visit. This condition, if not corrected, could lead to blade failure and consequent engine inflight shut-down (IFSD), possibly resulting in reduced control of the aeroplane. To address this potential unsafe condition and avoid dual engine IFSD, Rolls-Royce issued the inspection NMSB to provide inspection instructions and the NMSB to provide information on threshold and intervals. For the reasons described above, this [EASA] AD requires repetitive inspections of the affected parts and, depending on findings, accomplishment of applicable corrective action(s). You may obtain further information by examining the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA–2021–0381. E:\FR\FM\07SER1.SGM 07SER1

Agencies

[Federal Register Volume 86, Number 170 (Tuesday, September 7, 2021)]
[Rules and Regulations]
[Pages 49909-49912]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-19049]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0497; Project Identifier 2019-SW-043-AD; Amendment 
39-21711; AD 2021-18-10]
RIN 2120-AA64


Airworthiness Directives; Bell Textron Canada Limited Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Bell Textron Canada Limited Model 429 helicopters. This AD was 
prompted by three reports of unexpected forces or uncommanded inputs to 
the directional (yaw) control system. This AD requires revising the 
existing Rotorcraft Flight

[[Page 49910]]

Manual (RFM) for your helicopter. The FAA is issuing this AD to address 
the unsafe condition on these products.

DATES: This AD is effective October 12, 2021.

ADDRESSES: For service information identified in this final rule, 
contact Bell Textron Canada Limited, 12,800 Rue de l'Avenir, Mirabel, 
Quebec J7J1R4, Canada; telephone (450) 437-2862 or (800) 363-8023; fax 
(450) 433-0272; or at https://www.bellcustomer.com. You may view the 
referenced service information at the FAA, Office of the Regional 
Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort 
Worth, TX 76177. For information on the availability of this material 
at the FAA, call (817) 222-5110.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0497; 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 
Transport Canada AD, any comments received, and other information. The 
street 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: Mitch Soth, Flight Test Engineer, 
Southwest Section, Flight Test Branch, Compliance & Airworthiness 
Division, FAA, 10101 Hillwood Pkwy., Fort Worth, TX 76177; telephone 
(817) 222-5110; email [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 Bell Textron Canada 
Limited Model 429 helicopters, serial numbers 57001 and subsequent. The 
NPRM published in the Federal Register on July 7, 2021 (86 FR 35692). 
In the NPRM, the FAA proposed to require revising the existing RFM for 
your helicopter by adding procedures in Section 2, Normal Procedures, 
under 2-4. INTERIOR AND PRESTART CHECK, 2-5. ENGINE START, and 2-8. 
TAKEOFF; Section 3, Emergency and Malfunction Procedures, under 3-9. 
AUTOMATIC FLIGHT CONTROL SYSTEM; and Section 4, Performance, under 4-2. 
POWER ASSURANCE CHECK. The owner/operator (pilot) may revise the 
existing RFM for your helicopter, and the owner/operator must enter 
compliance with the applicable paragraphs of the AD into the aircraft 
records in accordance with Sec.  43.9(a)(1) through (4) and Sec.  
91.417(a)(2)(v). This is an exception to the FAA's standard maintenance 
regulations.
    The NPRM was prompted by Transport Canada Emergency AD CF-2019-16, 
dated May 6, 2019 (Transport Canada AD CF-2019-16), issued by Transport 
Canada, which is the aviation authority for Canada to correct an unsafe 
condition for Bell Helicopter Textron Canada Limited (now Bell Textron 
Canada Limited) Model 429 helicopters, serial numbers 57001 and 
subsequent. Transport Canada advises of three reports of unexpected 
forces or uncommanded inputs to the directional (yaw) control system 
during ground operations. Investigation revealed that a yaw trim 
runaway can occur while the automatic pedal trim function is operating. 
This condition, if not addressed, could result in loss of control of 
the helicopter. Accordingly, Transport Canada AD CF-2019-16 requires 
revising Bell RFM BHT-429-FM-1 by incorporating revision 14, dated 
April 18, 2019.

Discussion of Final Airworthiness Directive

Comments

    The FAA received one comment from an individual who supported the 
NPRM without change.

Conclusion

    These helicopters have been approved by the aviation authority of 
Canada and are approved for operation in the United States. Pursuant to 
the FAA's bilateral agreement with Canada, Transport Canada, its 
technical representative, has notified the FAA of the unsafe condition 
described in its AD. The FAA reviewed the relevant data, considered the 
comment 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 helicopters.

Related Service Information

    The FAA reviewed Section 2--Normal Procedures, Section 3--Emergency 
and Malfunction Procedures, and Section 4--Performance, of Bell RFM 
BHT-429-FM-1, Revision 14, dated April 18, 2019. This revision of the 
service information adds a procedure to reduce the risk of trim runaway 
during start sequence, cautions to reduce the risk of uncommanded 
control movement during engine start and takeoff and re-setting force 
trim detent instructions during engine start and takeoff, and an 
emergency procedure to assist flight crew to recognize trim runaway and 
response instructions.

Costs of Compliance

    The FAA estimates that this AD affects 120 helicopters of U.S. 
Registry. Labor rates are estimated at $85 per work-hour. Based on 
these numbers, the FAA estimates the following costs to comply with 
this AD.
    Revising the existing RFM for your helicopter takes about 0.50 
work-hour for an estimated cost of $43 per helicopter and $5,160 for 
the U.S. fleet.

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 helicopters 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,

[[Page 49911]]

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:

2021-18-10 Bell Textron Canada Limited: Amendment 39-21711; Docket 
No. FAA-2021-0497; Project Identifier 2019-SW-043-AD.

(a) Effective Date

    This airworthiness directive (AD) is effective October 12, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bell Textron Canada Limited Model 429 
helicopters, certificated in any category, serial numbers 57001 and 
subsequent.

(d) Subject

    Joint Aircraft Service Component (JASC) Code: 6720, Tail Rotor 
Control System.

(e) Unsafe Condition

    This AD was prompted by three reports of unexpected forces or 
uncommanded inputs to the directional (yaw) control system. The FAA 
is issuing this AD to prevent yaw trim runaway. The unsafe 
condition, if not addressed, could result in loss of control of the 
helicopter.

(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, revise 
the existing Rotorcraft Flight Manual for your helicopter as 
follows:
    (i) In Section 2, Normal Procedures, under 2-4. INTERIOR AND 
PRESTART CHECK, add the following as item 25: ``25. Depress the 
cyclic force TRIM REL button and collective FORCE REL button (4-axis 
only) to center actuators and extinguish any active out of detent 
indications.''
    (ii) In Section 2, Normal Procedures, under 2-5. ENGINE START 
and under 2-8. TAKEOFF, add the following above item 1: ``CAUTION: 
WHEN MANIPULATING FLIGHT CONTROLS WITH FORCE TRIM SELECTED ON, DO 
NOT RELEASE AFFECTED FLIGHT CONTROL UNTIL THE OUT OF DETENT 
INDICATION EXTINGUISHES. THE FLIGHT CONTROLS MAY BE RESET BY 
DEPRESSING THE CYCLIC FORCE TRIM REL BUTTON AND COLLECTIVE FORCE REL 
BUTTON (4-AXIS ONLY) UNTIL THE OUT OF DETENT INDICATION 
EXTINGUISHES.''
    (iii) In Section 3, Emergency and Malfunction Procedures, under 
3-9. AUTOMATIC FLIGHT CONTROL SYSTEM, add the information in Figure 
1 to paragraph (g)(1)(iii) of this AD as item 3-9-D:
[GRAPHIC] [TIFF OMITTED] TR07SE21.000

    (iv) In Section 4, Performance, under 4-2. POWER ASSURANCE 
CHECK, add the following above the instructions for performing a 
power assurance check: ``CAUTION: WHEN MANIPULATING FLIGHT CONTROLS 
WITH FORCE TRIM SELECTED ON, DO NOT RELEASE AFFECTED FLIGHT CONTROL 
UNTIL THE OUT OF DETENT INDICATION EXTINGUISHES. THE FLIGHT CONTROLS 
MAY BE RESET BY DEPRESSING THE CYCLIC FORCE TRIM REL BUTTON AND 
COLLECTIVE FORCE REL BUTTON (4-AXIS ONLY) UNTIL THE OUT OF DETENT 
INDICATION EXTINGUISHES.''
    (2) Using a document with information identical to the 
information in paragraph (g)(1) of this AD is acceptable for 
compliance

[[Page 49912]]

with the actions required by paragraph (g)(1) of this AD.
    (3) The actions required by paragraphs (g)(1) and (2) of this AD 
may be performed by the owner/operator (pilot) holding at least a 
private pilot certificate and must be entered into the aircraft 
records showing compliance with this AD in accordance with Sec.  
43.9(a)(1) through (4) and Sec.  91.417(a)(2)(v). The record must be 
maintained as required by Sec.  91.417, Sec.  121.380, or Sec.  
135.439.

(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 International Validation Branch, send 
it to the attention of the person identified in paragraph (i)(1) of 
this AD. Information may be emailed to: [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 Mitch Soth, 
Flight Test Engineer, Southwest Section, Flight Test Branch, 
Compliance & Airworthiness Division, FAA, 10101 Hillwood Pkwy., Fort 
Worth, TX 76177; telephone (817) 222-5110; email [email protected].
    (2) The subject of this AD is addressed in Transport Canada 
Emergency AD CF-2019-16, dated May 6, 2019. You may view the 
Transport Canada AD on the internet at https://www.regulations.gov 
in Docket No. FAA-2021-0497.

(j) Material Incorporated by Reference

    None.

    Issued on August 26, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2021-19049 Filed 9-3-21; 8:45 am]
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