Airworthiness Directive · Amendment 39-21403 · Rotorcraft flight control
Hélicoptères Guimbal Helicopters
Superseded. A later AD replaced this one: AD 2022-07-12. Comply with the one in force.
This AD applies to Hélicoptères Guimbal Model Cabri G2 helicopters, certificated in any category, 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.
The FAA is adopting a new airworthiness directive (AD) for all H[eacute]licopt[egrave]res Guimbal Model Cabri G2 helicopters. This AD was prompted by a report of a crack in a rotating scissor fitting. This AD requires an initial and repetitive inspections of certain rotating and non-rotating scissor fittings, and depending on the results, replacing the affected assembly. This AD also prohibits installing certain main rotor hubs (MRHs) and swashplate guides unless the initial inspection has been accomplished. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Within 30 hours time-in-service (TIS) or 30 calendar days, whichever occurs first:
(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.
(ii) If there is a crack, before further flight, replace the MRH or swashplate guide, as applicable.
(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.
(2) Thereafter, within 50 hours TIS or 6 months, whichever occurs first, and at intervals not to exceed 50 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 C, dated October 5, 2020.
(ii) If there is a crack, before further flight, replace the MRH or swashplate guide, as applicable.
(3) As of the effective date of this AD, do not install an MRH or swashplate guide, with rotating or non-rotating scissor fitting P/N G12-00-200 installed, respectively, on any helicopter, even if new, unless the actions required by paragraph (g)(1) of this AD have been accomplished.
