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Federal Register / Vol. 86, No. 129 / Friday, July 9, 2021 / Proposed Rules
could result in failure of the M/R
swashplate guide bellcrank and reduced control of the helicopter. Accordingly, EASA AD 20190185 requires replacing any part-numbered metal bushing with plastic bushing part number P/N
HG221001. EASA AD 20190185 also prohibits installing any part-numbered metal bushing on the M/R swashplate guide bellcrank other than P/N HG22
1001 on any helicopter.
FAAs Determination These helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAAs bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA is proposing this AD after evaluating all known relevant information and determining that the unsafe condition described previously is likely to exist or develop on other helicopters of the same type designs.
Related Service Information The FAA reviewed Guimbal Service Bulletin SB 17003, Revision D, dated August 27, 2019 SB 17003 Rev D.
This service information specifies disconnecting the bellcrank installed on the swashplate guide by removing the bolts that connect the bellcrank to the swashplate guide, removing any existing bushings, and visually inspecting the lug bore area for corrosion or cracks.
This service information also specifies if there is any corrosion or cracks, reporting the information to HG
support, installing the new plastic bushings, reinstalling the bellcrank, applying a specified torque, and installing cotter pins.

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Other Related Service Information The FAA also reviewed Guimbal Service Bulletin SB 17003, Revision C, dated July 12, 2019 SB 17003 Rev C.
SB 17003 Rev C specifies the same procedures as SB 17003 Rev D, except SB 17003 Rev D updates the reference to EASA AD 20190185.
Proposed AD Requirements in This NPRM
This proposed AD would require, within 50 hours time-in-service or 2
months, whichever occurs first after the effective date of this AD, disconnecting the bellcrank from the swashplate guide, removing each bolt and using a certain tool, removing certain parts from service. This proposed AD would also require visually inspecting the lug bore area for corrosion and cracks and depending on the inspection results, removing certain parts from service, or
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repairing the area using an FAAapproved method, installing certain part-numbered plastic bushings, coating the area with a compound, reinstalling certain parts, applying a specified torque, and installing cotter pins.
Differences Between This Proposed AD
and the EASA AD
EASA AD 20190185 applies to all Model Cabri G2 helicopters, whereas this proposed AD would only apply to Model Cabri G2 helicopters with any metal bushings installed and without HG modification 16009. The service information required by the EASA AD
requires contacting Helicopteres Guimbal for corrective actions when corrosion or cracks are found in the lug bore area whereas this AD requires removing the swashplate guide from service or repairing it using an FAAapproved method.
Costs of Compliance The FAA estimates that this proposed AD would affect 32 helicopters of U.S.
Registry. The FAA estimates that operators may incur the following costs in order to comply with this proposed AD. Labor costs are estimated at $85 per work-hour.
Disconnecting the bellcrank, removing each metal bushing and visually inspecting for corrosion and 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 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 products identified in this rulemaking action.

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Regulatory Findings The FAA determined that this proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would 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, I certify this proposed regulation:
1 Is not a significant regulatory action under Executive Order 12866, 2 Would not affect intrastate aviation in Alaska, and 3 Would 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 Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

Helicopteres Guimbal: Docket No. FAA
20210498; Project Identifier 2019SW
072AD.
a Comments Due Date The FAA must receive comments on this airworthiness directive AD by August 23, 2021.
b Affected ADs None.
c Applicability This AD applies to Helicopteres 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 HG221001 or HG modification 16009.
d Subject Joint Aircraft Service Component JASC
Code: 6700, Rotorcraft Flight Control.

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