What was found
FLT 246 - LIH-HNL - FELT 'THUMP' IN AIRFRAME DURING NORMAL CRUISE. DECLARED PRECAUTIONARY AND ADVISED TOWER OF INTENT TO EXTEND GEAR AND PERFORM FLY-BY OF TOWER. REQUESTED VISUAL OF TIRES SUSPECTING POSSIBLE TIRE BLOWOUT. TOWER REPORTED TIRES NORMAL. COMPLETED NORMAL LANDING WITH FIRE EQUIPMENT STANDING BY. GEARS PINNED BY MX. PERSONNEL AND A/C TAXIED TO TERMINAL WITH NO FURTHER PROBLEM. FOUND LEFT AFT INBOARD T/E FLAP COMPOSITE MATERIAL TORN OFF IN FLIGHT AND MISSING. REMOVED AND REPLACED THE LEFT AFT INBOARD T/E FLAP IAW MM 27-51-31, PAGE 401-405, OPERATIONAL AND RIG CHECK OK. REMOVED GEAR PINS. AIRCRAFT RETURNED TO SERVICE. (M)