Brazil 2020-04-01R1

Cancels and replaces AD 2020-04-01. Updated AD requires inspection and replacement of the left- and right-hand cockpit side windows with modified side windows carrying a new part number. Prompted by occurrences of cracks, delamination, and failure of the cockpit side windows during the certification fatigue tests. The presence of delamination or any other damage might impair the detection of existing cracks. Cracks could cause failure of the cockpit side window, leading to an in-flight depressurization event.