Airworthiness directives › 2021-19-04
AD 2021-19-04 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, certificated in any category, with any metal bushings installed on the main rotor (M/R) swashplate guide bellcrank and without plastic bushing part number HG22-1001 or HG modification 16-009.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 50 hours time-in-service (TIS) or 2 months, whichever occurs first after the effective date of this AD: (i) Disconnect the bellcrank from the swashplate guide by removing each bolt and, ensuring that the bellcrank remains attached to the flight control rod, remove each metal bushing from service using a bushing disassembly tool. (ii) Visually inspect the lug bore area for any corrosion and any cracks. If there is any corrosion or any cracks, before further flight, remove the swashplate guide from service or repair it using an FAA-approved method. If there is no corrosion and no cracks, install plastic bushing part number HG22-1001, coat plastic bushing with isolation compound, re-install the bellcrank, torque each bolt to 7.5 Nm-9 Nm (5.5 ft-lbs-6.6 ft-lbs), and install cotter pins. (2) As of the effective date of this AD, do not install any metal bushing on any helicopter.
Unsafe condition
This AD was prompted by a report of cracks on the M/R scissor link. The FAA is issuing this AD to replace the metal bushings installed on the M/R swashplate guide bellcrank with plastic bushings. The unsafe condition, if not addressed, could result in failure of the M/R swashplate guide bellcrank and reduced control of the helicopter.
Affected ADs
None.
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