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Federal Register / Vol. 86, No. 49 / Tuesday, March 16, 2021 / Rules and Regulations and expands the prohibition. This AD
was prompted by the determination that visual inspections do not adequately detect a crack and additional findings that a crack may occur sooner than previously expected. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD becomes effective March 31, 2021.
The Director of the Federal Register approved the incorporation by reference of certain documents listed in this AD
as of March 31, 2021.
The FAA must receive comments on this AD by April 30, 2021.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to https www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9 a.m. and 5
p.m., Monday through Friday, except Federal holidays.
For service information identified in this final rule, contact Bell Textron Canada Limited, 12,800 Rue de lAvenir, Mirabel, Quebec J7J1R4; telephone 450
4372862 or 800 3638023; fax 450
4330272; or at https
www.bellcustomer.com. You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX
76177. For information on the availability of this material at the FAA, call 817 2225110. It is also available at https www.regulations.gov by searching for and locating Docket No.
FAA20210144.

jbell on DSKJLSW7X2PROD with RULES

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210144; 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 listed above.
FOR FURTHER INFORMATION CONTACT: Hal Jensen, Aerospace Engineer, Operational Safety Branch, Compliance &
Airworthiness Division, FAA National Headquarters, 950 LEnfant Plaza N SW,
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Washington, DC 20024; telephone 202
2679167; email hal.jensen@faa.gov.
SUPPLEMENTARY INFORMATION:
Background On February 22, 2021, the FAA issued Emergency AD 20210552 Emergency AD 20210552, which was made immediately effective to all known U.S.
owners and operators of Bell Model 505
helicopters, serial numbers 65011 and subsequent. Emergency AD 20210552
required, before further flight, removing the pilot collective stick from the jackshaft assembly, cleaning it, and then visually inspecting the complete circumference of certain areas for a crack. If the visual inspection did not reveal a crack, Emergency AD 202105
52 required performing an FPI for a crack. Removing from service any cracked pilot collective stick was required before further flight, and if a crack was discovered, reporting certain information to Bell was required within 10 days.
Emergency AD 20210552 was prompted by Canadian Emergency AD
CF202105, dated February 21, 2021
Canadian AD CF202105, issued by Transport Canada, which is the aviation authority for Canada, to correct an unsafe condition for Bell Model 505
helicopters, serial numbers 65011 and subsequent. Transport Canada advised of a report that a pilot collective stick cracked above the cabin floor at the junction with the collective jackshaft.
This finding occurred prior to engine start during the pilot pre-flight check of flight controls for travel. The exact cause of the crack was still under investigation, and Transport Canada advised that the unsafe condition, if not addressed, could result in failure of the pilot collective stick and subsequent loss of control of the helicopter.
Accordingly, Canadian AD CF2021
05 required a one-time visual inspection and as applicable, an FPI of the pilot collective stick to detect cracking. If the pilot collective stick was found to be unserviceable, Canadian AD CF2021
05 required replacing the collective stick with a serviceable part prior to further flight. Transport Canada advised that a serviceable collective stick is a new collective stick or a collective stick with no crack found during the visual inspection or FPI required by its AD.
Transport Canada considered Canadian AD CF202105 an interim action and stated that further AD action may follow.
Actions Since Emergency AD 202105
52 was Issued Since the FAA issued Emergency AD
20210552, Bell has twice revised its
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service information. The service information was first revised to remove the procedures for a visual inspection and instead specify recurring FPIs, and Transport Canada superseded Canadian AD CF202105 accordingly with Emergency AD CF202105R1, dated February 26, 2021 Canadian AD CF
202105R1. Canadian AD CF2021
05R1 advised that examination of a pilot collective stick and another cracked pilot collective stick by Bell revealed fatigue cracking. Based on these findings, Bell determined that a visual inspection is not adequate for detecting smaller cracks. Accordingly, Canadian AD CF202105R1 required an initial FPI for cracks before further flight and then at intervals not to exceed 25 hours time-in-service TIS. Canadian AD CF
202105R1 also contained a ferry flight provision that specifies that ferry flights are permitted to a maintenance base to carry out the FPI, provided that the helicopter is flown from the copilot seat only. Transport Canada considered Canadian AD CF202105R1 an interim action and stated that further AD action may follow.
Bell then again revised its service information to specify inserting a temporary revision TR into the RFM
that prohibits single pilot operations from the right crew seat. Transport Canada again superseded its AD
accordingly with Emergency AD CF
202105R2, dated March 4, 2021
Canadian AD CF202105R2.
Canadian AD CF202105R2 specifies that subsequent to the issuance of Canadian AD CF202105R1, additional FPI findings showed that cracking of the pilot collective stick could occur at very low flight hours. As a result, Bell published revised service information to introduce TRs to the RFMs to prohibit single pilot operations from the right crew seat. Transport Canada considers Canadian AD CF202105R2 an interim action as well and states that further AD
action may follow to mandate further corrective actions to modify the pilot collective stick to prevent cracking and subsequent failure.
FAAs Determination These helicopters have been approved by the aviation authority of Canada and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with Canada, Transport Canada, its technical representative, has notified the FAA of the unsafe condition described in its AD. The FAA is issuing this AD after evaluating all known relevant information and determining that the unsafe condition described previously is likely to exist or develop
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