Airworthiness directives › 2026-10-51
AD 2026-10-51 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 all Hélicoptères Guimbal (HG) Model Cabri G2 helicopters, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Affected part: main gear boxes (MGB), having part number (P/N) G21-10-000, P/N G21-10-001, P/N G21-10-002, or P/N G21-10-003. (2) Group 1: Helicopters having an affected part installed during production that thereafter, has not been removed from that helicopter. (3) Group 2: Helicopters are those which are not Group 1 and are not Group 3. (4) Group 3: Helicopters are those with an affected part installed and having a MGB serial number (S/N) of 825, 867, 875, 973, 1029, 1086, 1099, 1170, or 1206.
Unsafe condition
This AD was prompted by a report of a crack on the main rotor (MR) mast after the crew reported an abnormal increase of vibration. The FAA is issuing this AD to detect and correct any cracks or corrosion on the MR mast. This condition, if not detected and corrected, could lead to failure of the MR mast, possibly resulting in loss of control of the helicopter.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1