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Rules and Regulations
Federal Register Vol. 86, No. 44
Tuesday, March 9, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

FOR FURTHER INFORMATION CONTACT:

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
Kuethe Harmon, Safety Management Program Manager, DSCO Branch, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225198; email kuethe.harmon@faa.gov.

14 CFR Part 39

SUPPLEMENTARY INFORMATION:

Docket No. FAA20200270; Product Identifier 2019SW018AD; Amendment 3921441; AD 20210419

Discussion
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Airworthiness Directives; Bell Textron Inc. Type Certificate Previously Held by Bell Helicopter Textron Inc.
Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for Bell Textron Inc. Bell Model 205B
helicopters. This AD was prompted by flight testing and fatigue analysis results. This AD requires reducing the life limit of certain tail rotor T/R
blades and re-identifying them with a new part number P/N. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective April 13, 2021.
SUMMARY:

For service information identified in this final rule contact, Bell Textron Inc., P.O. Box 482, Fort Worth, TX 76101; telephone 8172803391; fax 8172806466; 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 6N321, Fort Worth, TX
76177. Docket No. FAA20200270.

ADDRESSES:

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final rule, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20200270; 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
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The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to Bell Model 205B helicopters with a T/R blade P/N 212010750009
or 212010750105 installed. The NPRM published in the Federal Register on March 25, 2020 85 FR
16916. Flight testing and fatigue analysis by Bell indicated that these part-numbered T/R blades sustain greater loads when installed on Bell Model 205B helicopters compared to their use on other model helicopters. In the NPRM, the FAA proposed to require, before further flight, reducing the life limit of each affected T/R blade from 5,000 hours time-in-service TIS
to 2,500 hours TIS; re-identifying the T/R blade P/N on its data plate by vibroetching to change the last three digits of the existing P/N; creating a component history card or equivalent record; and revising the Airworthiness Limitations section of the existing maintenance manual for your helicopter to annotate the new P/N and revised life limit.
Finally, the NPRM proposed to prohibit installing any affected T/R blade that has not met the AD requirements.
The FAA issued a supplemental notice of proposed rulemaking SNPRM
to amend 14 CFR part 39 by adding an AD that would apply to Bell Model 205B helicopters. The SNPRM
published in the Federal Register on December 8, 2020 85 FR 78977. The SNPRM was prompted by a comment received on the NPRM requesting that the applicability paragraph be updated to include newly identified T/R blade part numbers. The FAA determined the NPRM should be revised to include the additional part-numbered T/R blades and the re-identification and life limit
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requirements for those additional partnumbered T/R blades.
Since the FAA issued the NPRM, Bell Helicopter Textron Inc., has changed its name to Bell Textron Inc. This final rule reflects that change and updates the contact information to obtain service documentation.
Comments The FAA received no comments on the SNPRM or on the determination of the costs.
Conclusion The FAA reviewed the relevant data 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.
Related Service Information The FAA reviewed Bell Helicopter Textron Alert Service Bulletin No.
205B2070, dated August 6, 2020, for Model 205B helicopters. This service information specifies reducing the life limit of T/R blade P/N 212010750
109, 212010750111, 212010750
113, 212010750117, 212010750
133, 212010750135, 212010750
117FM, and 212010750135FM to 2,500 hours time-in-service TIS. This service information also specifies reidentifying certain T/R blade P/Ns by assigning a new dash number by vibroetching a new P/N on the T/R blade data plate and annotating the historical record card.
The FAA also reviewed Bell Helicopter Textron Alert Service Bulletin No. 205B9827, dated June 1, 1998, for Model 205B helicopters. This service information specifies reducing the life limit of T/R blade P/N 212010
750009 and 212010750105 to 2,500
hours TIS and assigning these T/R
blades a new dash number by vibroetching a new P/N on the T/R blade data plate and annotating the historical record card.
Costs of Compliance The FAA estimates that this AD
affects approximately 2 helicopters of U.S. Registry. The FAA estimates that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85 per workhour.
Determining the total hours TIS of a T/R blade, re-identifying the P/N, and
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