What was found
DURING A POST-INSPECTION WALK-AROUND, A CRACK WAS NOTED EXTENDING APPROXIMATELY 1 INCH INTO THE VISIBLE AREA OF THE OUTER WINDOW IN THE CREW EMERGENCY ESCAPE DOOR. WHEN WINDOW RETAINERS WERE REMOVED, A CRACK 16 INCHES LONG CONNECTING 11 BOLT HOLES ACROSS THE TOP EDGE OF THE WINDOW WAS FOUND. THE CREW ESCAPE DOOR IS AN AFTER-MARKET INSTALLATION INSTALLED PER STC SA 252350 BY PRECISION AIR, INC., FAA REPAIR STATION NR 709-18 ON 3-2-89. THIS IS THE SECOND OCCURRENCE OF CRACKING ON THIS AIRCRAFT.