A B747-200F CAPT RPTS MULTIPLE FLT CTL RPTS TRACED TO A PANEL REPEATEDLY BEING KICKED LOOSE IN THE CREW REST BUNK AREA.

Narrative

WHILE PERFORMING HIS PRE FLT DUTIES; THE FO DISCOVERED A LOOSE PANEL ON THE BULKHEAD AFT OF THE LOWER LEFT BUNK (CAPT'S SIDE OF ACFT). THE PANEL APPEARS TO BE AN ACCESS DOOR THAT IS HELD IN PLACE WITH A SYSTEM OF SNAP-TYPE FASTENERS. THE FO DISCOVERED THAT THE PANEL HAD BEEN REMOVED OR BUMPED FROM IT'S POSITION AND FELL OUT OF THE UPPER DECK AREA ONTO CONTROL CABLES LOCATED AFT AND BELOW THE CREW REST AREA. THE PANEL SHOWED DAMAGE THAT SEEMS CONSISTENT WITH BEING JAMMED IN THE CONTROL CABLES. THEY REINSTALLED THE PANEL AND FOUND NO DEFECTS IN THE CONTROL CABLES. HOWEVER; THE ACFT HAS RECENT MULTIPLE WRITE-UPS FOR FLT CONTROL PROBS WHICH COULD BE TRACED TO THIS PANEL REPEATEDLY BEING KNOCKED LOOSE. I RECOMMEND THAT THE PANEL BE IMMEDIATELY REDESIGNED AND THAT THE FLEET BE INSPECTED FOR SIMILAR DOORS AND THEN REFITTED AS NEEDED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED RECENT FLT CTL PROBS CAN BE TRACED DIRECTLY TO THE PANEL INTERFERING WITH THE FLT CTLS BY DROPPING FROM THE UPPER DECK ONTO THE CTL CABLES LOCATED AFT AND BELOW THE CREW REST AREA. THE RPTR SAID THE PANEL IS LARGE BEING 24