Airworthiness directives › 2022-07-12
AD 2022-07-12 Airworthiness Directives; Hélicoptères Guimbal Helicopters
Makes named: guimbal. Models named: Cabri G2. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Hélicoptères Guimbal (HG) Model Cabri G2 helicopters, all serial numbers, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For helicopters with rotating or non-rotating scissor fitting part number (P/N) G12-00-200, installed on the main rotor hub (MRH) or swashplate guide, respectively: (1) Within 30 hours time-in-service (TIS) or 30 calendar days, whichever occurs first after February 22, 2021 (the effective date of AD 2021-02-20): (i) Remove the cotter pins and bolts connecting the rotating and non-rotating scissor fitting by following the Required Actions, IPC 4.1-2 a), of Guimbal Service Bulletin SB 20-012, Revision B, dated October 5, 2020 (SB 20-012 Rev B). Remove the cotter pins from service. Clean each scissor fitting. Using a flashlight, visually inspect each scissor fitting by following the Required Actions, IPC 4.1-2 b), of SB 20-012 Rev B. As an alternative to using SB 20-012 Rev B, you may remove the cotter pins and bolts in accordance with the Required Actions, IPC 4.1-2 a), of Guimbal Service Bulletin SB 20-012, Revision C, dated July 22, 2021 (SB 20-012 Rev C), and visually inspect each scissor fitting in accordance with the Required Actions, IPC 4.1-2 b), of SB 20-012 Rev C. (ii) If there is a crack, before further flight, replace the MRH or swashplate guide with an airworthy part as applicable; or, as an alternative, you may accomplish the modification specified in paragraph (g)(3) of this AD. (iii) If there is not a crack, reassemble the scissor fittings by following the Required Actions, IPC 4.1-2 c), of SB 20-012 Rev B. As an alternative to using SB 20-012 Rev B, you may reassemble the scissor fittings in accordance with the Required Actions, IPC 4.1-2 c), of SB 20-012 Rev C. (2) Thereafter, within 60 hours TIS or 6 months, whichever occurs first after the effective date of this AD, and thereafter at intervals not to exceed 60 hours TIS or 6 months, whichever occurs first: (i) Leaving each rotating and non-rotating scissor fitting assembled, clean each scissor fitting. Using a flashlight, visually inspect each scissor fitting by following the Required Actions, IPC 4.1-2 a), of Guimbal Service Bulletin SB 20-011, Revision D, dated July 22, 2021. (ii) If there is a crack, before further flight, replace the MRH or swashplate guide, with an airworthy part as applicable; or, as an alternative, you may accomplish the modification specified in paragraph (g)(3) of this AD. (3) Within 60 months, or during the next main gearbox overhaul, whichever occurs first after the effective date of this AD, remove MRH P/N G12-00-100, or G12-00-101, or G12-00-102 and swashplate guide P/N G21-01-101 or G21-01-102 from service and modify your helicopter by installing MRH P/N G12-00-103 and swashplate guide P/N G21-01-103 containing scissor fitting P/N G12-00-202 (HG modification (mod) 20-040) by following the Required Actions, IPC 2.1-0 a) through k) and m) through aa) of Guimbal Service Bulletin SB 21-007, Revision C, dated July 22, 2021. Note 1 to paragraph (g)(3): HG mod 20-040, as referenced in paragraphs (g)(3), and (h)(1) and (2) of this AD, is accomplished after installation of MRH P/N G12-00-103 and swashplate guide P/N G21-01-103 containing scissor fitting P/N G12-00-202. (4) Completing the actions required by paragraph (g)(3) of this AD constitutes a terminating action for the requirements in paragraphs (g)(1) and (2) of this AD.
Unsafe condition
This AD was prompted by a report of a crack in a rotating scissor fitting. The FAA is issuing this AD to detect a crack and prevent failure of a scissor fitting. The unsafe condition, if not addressed, could result in failure of a rotating or non-rotating scissor fitting and subsequent loss of control of the helicopter.
Affected ADs
This AD replaces AD 2021-02-20, Amendment 39-21403 (86 FR 8299, February 5, 2021) (AD 2021-02-20).
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