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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations part 39 by adding an AD that would apply to Bell Model 429 helicopters with a Bell EFS kit part number P/N
429706069101/103/105/121/
123/125/139/141/143/or 157
manufactured before July 2019, with a float supply hose manufactured before January 2014, installed, except for float supply hoses marked with SB 02569
21 above the external identification marking. The NPRM published in the Federal Register on March 23, 2021 86
FR 15434. In the NPRM, the FAA
proposed to require within 100 hours time-in-service TIS, removing each EFS supply hose and inspecting each end also referred to as fitting or banjo of the EFS supply hose using a certain plastic cable tie, and depending on the results of those inspections, removing from service certain parts and replacing those parts with airworthy parts. The NPRM also proposed to require marking a green dot on the base of certain supply hoses and writing SB 0256921
above the external identification marking of the EFS with indelible ink.
Finally, the NPRM proposed to prohibit installing any EFS supply hose manufactured before January 2014
unless it has been inspected in accordance with the NPRM. The NPRM
was prompted by Canadian AD CF
202021R1, issued August 19, 2020
Transport Canada AD CF202021R1, by Transport Canada, which is the aviation authority for Canada, to correct an unsafe condition for all serialnumbered Bell Model 429 helicopters.
Transport Canada advises that during maintenance on an EFS, the third compartment of the left forward float did not inflate. Transport Canada also advises that an investigation determined the supply hose for the gas flow from the pressurized cylinder to the float compartment was blocked due to a manufacturing defect. Bell advised that similar supply hoses are installed on various EFS part numbers, which could be installed on different helicopter type designs. Transport Canada further advises that this condition, if not detected and corrected, could result in partial inflation of the EFS during an emergency landing on water, preventing a timely egress from the helicopter, and injury to helicopter occupants.
Accordingly, Transport Canada AD
CF202021R1 requires a one-time special detailed inspection of the affected system to verify that there is no blockage through the EFS supply hoses and replacement, as required, of the affected supply hoses. Transport Canada AD CF202021R1 also renders any affected EFS supply hoses not eligible as
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a replacement part on Bell Model 429
helicopters.
Discussion of Final Airworthiness Directive Comments The FAA received no comments on the NPRM or on the determination of the costs.
Conclusion 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 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 helicopters.
Related Service Information Under 1
CFR Part 51
The FAA reviewed Safran Aerosystems Services Service Bulletin No. 0256921, Revision 00, dated March 23, 2020 SB 0256921. SB
0256921 is attached to Bell Alert Service Bulletin No. 4292052, dated March 30, 2020 ASB 4292052. SB
0256921 is incorporated by reference in this AD. ASB 4292052 is not incorporated by reference in this AD. SB
0256921 specifies, for certain EFSs manufactured before July 2019, and any float supply hose manufactured before January 2014, performing a special inspection to verify that there is no blockage through the float supply hoses of the EFS inflation system.
This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
Differences Between This AD and the Transport Canada AD
The Transport Canada AD requires compliance within 600 hours air time or within the next 24-month inspection of the EFS, whichever occurs first, whereas this AD requires compliance within 100
hours TIS. The Transport Canada AD
limits the applicability to certain EFS
supply hoses listed in SB 0256921, whereas this AD applies to certain EFS
supply hoses manufactured before January 2014 but excludes EFS supply hoses marked with SB 0256921.
Costs of Compliance The FAA estimates that this AD
affects 110 helicopters of U.S. Registry and that operators may incur the
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following costs in order to comply with this AD. Labor costs are estimated at $85
per work-hour.
Removing and inspecting each EFS
supply hose will take about 0.75 workhour, for an estimated cost of $64 per hose.
Installing or replacing each EFS
supply hose will take about 0.10 workhour with a minimal parts cost, for an estimated cost of $9 per hose.
Marking each EFS supply hose with a green dot and the applicable service bulletin number will take a minimal amount of time at a nominal cost.
According to Safrans service information, some of the costs of this AD may be covered under warranty, thereby reducing the cost impact on affected individuals. The FAA does not control warranty coverage by Safran;
accordingly, all costs are included in this cost estimate.
Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs 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 Agencys 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
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