As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE REPLACING PRESSURIZATION SEAL ON EMERGENCY EXIT, UPHOLSTERY WAS REMOVED. FOUND OUTER WINDOW BROKEN BETWEEN FASTENER HOLES. PIECES WERE GLUED IN WITH RTV. CAUSE OF FAILURE BELIEVED TO BE IMPROPER INSTALLATION. NEW WINDOW INSTALLED ALONG WITH METAL RETAINER RING REQUIRED BY CESSNA SB MEB 87-4. (X)