|AGUSTA AW139 – ATA 5610 FLIGHT COMPARTMENT WINDOWS – WINDOW – Part Departed Aircraft. DR 611954520|
|Crew noticed a loud increase in noise level and airflow from the left side of the aircraft momentarily prior to realising the co-pilot window had fallen from the aircraft. Rubber seal was recovered semi attached, retrieved through the window opening.
Aircraft returned to base. Window replaced with serviceable item IAW AMM 39-A-56-31-01-00A-920B-A. Nil defect evident.