A B767-300 ER ON CLB AT FL300 DIVERTED DUE TO CABIN ATTENDANTS RPTING RED FLASHING LIGHT AND SWISHING SOUND FROM CTR OVERHEAD STORAGE BIN.

Narrative

AT FL300 FLT ATTENDANTS RPTED SEEING RED FLASHING LIGHT COMING FROM OVERHEAD STORAGE BIN ADJACENT TO SEAT XX. THEY ALSO RPTED A LOUD SWISHING SOUND FOLLOWED BY WHAT SOUNDED LIKE PLUGGING A HOLE. THERE WAS SOME AIR NOISE REMAINING BUT SOMEWHAT SUBDUED. AFTER COM WITH MAINT CTL; I ELECTED TO DIVERT TO ZZZZ FOR REPAIRS. MAINT FOUND THE TOP ROTATING BEACON SHATTERED. UPON FURTHER INVESTIGATION; THEY FOUND THE INTERIOR PORTION OF THE LIGHT LOOSE ABOVE THE OVERHEAD COMPARTMENT AND INSULATION UP AROUND THE ATTACHMENT HOLE WHERE THE LIGHT IS NORMALLY MOUNTED. WE MADE AN UNEVENTFUL OVERWT LNDG AT 278000 LBS AND RELEASED THE EMER EQUIP AFTER WE CLRED THE RWY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE GLASS WAS SHATTERED AND THIS LENS GLASS IS GREATER THAN .250 INCH WITH NO EVIDENCE OF A BIRD STRIKE. THE RPTR BELIEVED THE DIVERSION WAS WARRANTED DUE TO THE UNKNOWN DAMAGE. INSPECTION BY MAINT FOUND THE LIGHT LENS SHATTERED AND THE LIGHT ASSEMBLY LAYING ON THE TOP SURFACE OF THE OVERHEAD STORAGE BIN. THE HOLE LEFT BY THE LIGHT ASSEMBLY HAD BEEN FILLED WITH FUSELAGE INSULATION. MAY HAVE BEEN PREVIOUS DAMAGE OR CRACK IN THE LENS BUT NOT BIRD STRIKE.