Airworthiness directives › 2021-02-20
AD 2021-02-20 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 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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(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.
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
None.
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