What was found
WHILE CLIMBING OUT AFTER TAKEOFF, AT APPROX 20,000 FT, CO-PILOT WINDOW EXPERIENCED A CATASTROPHIC FAILURE. WINDOW SHARDS CONTACTED RT PROPELLER. PARTIALLY RIPPING HOT PROP BOOTS. PILOT RETURNED FOR INSPECTION AND REPAIR. CAUSE UNKNOWN/ SUSPECT CRACKS IN ATTACH AREA WHICH IS COVERED BY PRO-SEAL. INSPECT FOR CRACKS. (NM 02 FSDO INCIDENT NR 1NM 13200314)