AD 2021-19-07

The FAA is adopting a new airworthiness directive (AD) for certain \n\n((Page 54040)) \n\nHelicopteres Guimbal Model CABRI G2 helicopters. This AD was prompted by a report that, during scheduled maintenance on two helicopters, cracks were found on a certain main rotor (MR) non- rotating scissor link. This AD requires replacing an affected MR non- rotating scissor link with a serviceable part. The FAA is issuing this AD to address the unsafe condition on these products.

Final rule.

The Amendment \n\n\n\tAccordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows: \n\nPART 39--AIRWORTHINESS DIRECTIVES \n\n0 1. The authority citation for part 39 continues to read as follows: \n\n\n\tAuthority: 49 U.S.C. 106(g), 40113, 44701. \n\n\n\nSec. 39.13 (Amended) \n\n0 2. The FAA amends Sec. 39.13 by adding the following new airworthiness directive: \n\n\n\t2021-19-07 Helicopteres Guimbal: Amendment 39-21725; Docket No. FAA-2021-0574; Project Identifier 2019-SW-073-AD. \n\n(a) Effective Date \n\n\n\tThis airworthiness directive (AD) is effective November 4, 2021. \n\n(b) Affected ADs \n\n\n\tNone. \n\n(c) Applicability \n\n\n\tThis AD applies to Helicopteres Guimbal Model CABRI G2 helicopters, certificated in any category, with main rotor (MR) non-rotating scissor links, part number (P/N) G41-10-200 installed. \n\n(d) Subject \n\n\n\tJoint Aircraft Service Component (JASC) Code: 6700, Rotorcraft Flight Control. \n\n(e) UnsafeCondition \n\n\n\tThis AD was prompted by a report that during scheduled maintenance on two helicopters, cracks were found on the MR non- rotating scissor link with P/N G41-10-200. The FAA is issuing this AD to address cracking of a MR non-rotating scissor link. Cracking of a MR non-rotating scissor link, if not addressed, could result in failure of that scissor link, resulting in reduced control of the helicopter. \n\n(f) Compliance \n\n\n\tComply with this AD within the compliance times specified, unless already done. \n\n(g) Required Actions \n\n\n\t(1) Within 50 hours time-in-service or 2 months after the effective date of this AD, whichever occurs first, modify the helicopter by replacing the MR non-rotating scissor link, P/N G41- 10-200, with a serviceable scissor link assembly, P/N G41-12-100, in accordance with the Required Actions, IPC 4.1-2 (a) through (d) inclusive, of Guimbal Service Bulletin SB 15-015, Revision C, dated August 27, 2019. \n\t(2) As of the effective date of this AD, do not install a MR non-rotating scissor link, P/N G41-10-200, on any helicopter. \n\n(h) Credit for Previous Actions \n\n\n\tThis paragraph provides credit for actions required by paragraph (g)(1) of this AD, if those actions were performed before the effective date of this AD using the service information specified in paragraph (h)(1) or (2) of this AD. \n\t(1) Guimbal Service Bulletin SB 15-015, Revision A, dated July 20, 2015. \n\t(2) Guimbal Service Bulletin SB 15-015, Revision B, dated July 12, 2019. \n\n(i) Special Flight Permits \n\n\n\tSpecial flight permits, as described in 14 CFR 21.197 and 21.199, are prohibited. \n\n(j) Alternative Methods of Compliance (AMOCs) \n\n\n\t(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 sendinginformation directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (k)(1) of this AD. Information may be emailed to: 9-AVS-AIR-730-AMOC@faa.gov. \n\t(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. \n\n(k) Related Information \n\n\n\t(1) For more information about this AD, contact Darren Gassetto, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600 Stewart Ave., Suite 410, Westbury, NY 11590; telephone (516) 228- 7323; email Darren.Gassetto@faa.gov. \n\t(2) Service information identified in this AD that is not incorporated by reference is available at the addresses specified in paragraphs (l)(3) and (4) of this AD. \n\t(3) The subject of this AD is addressed in European Union Aviation Safety Agency (EASA) AD 2019-0186, dated July 30, 2019. You may view the EASA AD at https://www.regulations.gov in Docket No. FAA-2021-0574. \n\n(l) Material Incorporated by Reference \n\n\n\t(1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. \n\t(2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. \n\t(i) Guimbal Service Bulletin SB 15-015, Revision C, dated August 27, 2019. \n\t(ii) (Reserved) \n\t(3) For service information identified in this AD, contact Helicopteres Guimbal, 1070, rue du Lieutenant Parayre, Aerodrome d'Aix-en-Provence, 13290 Les Milles, France; telephone 33-04-42-39-10-88; email support@guimbal.com; or at https://www.guimbal.com. \n\t(4) You may view this 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. \n\t(5) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fr.inspection@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html. \n\n\n\tIssued on September 1, 2021. Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service. (FR Doc. 2021-21116 Filed 9-29-21; 8:45 am) BILLING CODE 4910-13-P

Background \n\n\n\tThe FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Helicopteres Guimbal Model CABRI G2 helicopters. The NPRM published in the Federal Register on July 23, 2021 (86 FR 38943). In the NPRM, the FAA proposed to require replacing an affected MR non- rotating scissor link with a serviceable part. The NPRM was prompted by EASA AD 2019-0186, dated July 30, 2019 (EASA AD 2019-0186), issued by EASA, which is the Technical Agent for the Member States of the European Union, to correct an unsafe condition for certain Helicopteres Guimbal Model CABRI G2 helicopters. EASA advises that, during scheduled maintenance on two helicopters, cracks were found on the MR non-rotating scissor link, part number (P/N) G41- 10-200. The suspected root cause for the cracking is corrosion due to stress induced by the mounting of the metal bushings inside the lug hole. To address this issue the manufacturer modified the design of the MR non-rotating scissor link to reinforce the lugs and replace the metal bushings with plastic bushings. Cracking of a MR non-rotating scissor link, if not addressed, could result in failure of that scissor link, resulting in reduced control of the helicopter. \n\tAccordingly, EASA AD 2019-0186 requires replacement of affected MR non-rotating scissor links with serviceable parts. \n\nDiscussion of Final Airworthiness Directive \n\nComments \n\n\n\tThe FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public. \n\nConclusion \n\n\n\tThese helicopters have been approved by EASA and are approved for operation in the United States. Pursuant to the FAA's bilateral agreement with the European Union, EASA has notified the FAA about the unsafe condition described in its AD. The FAA reviewed the relevant data and determined that air safety requiresadopting this AD as proposed. Accordingly, the FAA is issuing this AD to address the unsafe condition on these helicopters. Except for minor editorial changes, this AD is adopted as proposed in the NPRM. \n\nRelated Service Information Under 1 CFR Part 51 \n\n\n\tThe FAA reviewed Guimbal Service Bulletin SB 15-015, Revision C, dated August 27, 2019. This service information specifies procedures for, among other actions, modifying the helicopter by replacing the MR nonrotating scissor link, P/N G41-10-200, with a serviceable part, P/N G41-10-201 (by installing scissor link assembly, P/N G41-12-100, which includes MR non-rotating scissor link, P/N G41-10-201) and torqueing the bolts. 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. \n\nOther Related Service Information \n\n\n\tThe FAA also reviewed Guimbal Service Bulletin SB 15-015, Revision A, dated July 20, 2015 (SB 15-015, Revision A); and SB 15-015, Revision B, dated July 12, 2019 (SB 15-015, Revision B). SB 15-015, Revision A, describes procedures for replacing a MR non-rotating scissor link, P/N G41-10-200, with P/N G41-12-100, which has a new, improved design. SB 15-015, Revision B, describes the same procedures as SB 15-015, Revision A, and includes a revised compliance time, an updated Situation section, and added an action. \n\nCosts of Compliance \n\n\n\tThe FAA estimates that this AD affects 32 helicopters of U.S. registry. The FAA estimates the following costs to comply with this AD: \n\n\n\tEstimated Costs for Required Actions ---------------------------------------------------------------------------------------------------------------- \n\tCost per Cost on U.S. \n\tAction Labor cost Parts cost product operators ---------------------------------------------------------------------------------------------------------------- Replacement........................... 1 work-hour x $85 per $323 $408 $13,056 \n\thour = $85. ---------------------------------------------------------------------------------------------------------------- \n\n\n\n((Page 54041)) \n\nAuthority for This Rulemaking \n\n\n\tTitle 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. \n\tThe 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. \n\nRegulatory Findings \n\n\n\tThis 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. \n\tFor the reasons discussed above, I certify that this AD: \n\t(1) Is not a ''significant regulatory action'' under Executive Order 12866, \n\t(2) Will not affect intrastate aviation in Alaska, and \n\t(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. \n\nList of Subjects in 14 CFR Part 39 \n\n\n\tAir transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.