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Helicopter tail gearbox on a maintenance workbench, inspection mirror and darkened oil sample in the foreground
· 10 minEASAADAirworthinessRecordsCAMOLeonardo

EASA AD 2026-0168: the TGB serial number decides

Issued 24 August 2026 and effective 7 September 2026, AD 2026-0168 sorts the A109/AW109 fleet into two groups by the P/N and s/n of the installed tail gearbox: repetitive inspections every 100 FH or 6 months, reporting to Leonardo, and a terminating action by replacement

EASA AD 2026-0168 (A109/AW109, Turbomecanica tail gearbox P/N 109-0442-01, s/n TURXXXXX): the part serial number sets the 100 FH / 6-month repetitive regime.