What was found
(CAN) AFTER TAKEOFF THE PILOTS NOTICED THAT THE TOP FRONT COWLING WAS LIFTING OFF AT THE REAR. THEY RETURNED TO THE FIELD AND DURING THE FLARE THE COWLING DEPARTED THE AIRCRAFT, STRIKING AND DAMAGING THE PROP REQUIRING ITS DISASSEMBLY AND RT WING DAMAGING THE OB DEICE BOOT. THE POWER SECTION WAS REMOVED FOR A PROP STRIKE INSPECTION. MAINTENANCE HAD BEEN ACCOMPLISHED THE PREVIOUS EVENING WHERE THAT COWLING HAD BEEN REMOVED AND REINSTALLED. THE (4) LATCHES APPEARED SECURE TO THE AME AND THE PILOTS ON THEIR WALK AROUND. THERE IS NO VISUAL AID ON THIS COWLING DESIGN OTHER THEN THE LATCH BEING (FLUSH) TO INDICATE TO THE PILOT OR TECHNICIAN THAT THE LATCH IS SECURED. PREVIOUS EXPERIENCE HAS SHOWN THAT THE DIFFERENCE