ACFT FLOWN WITHOUT REQUIRED REPAIRS WHEN MECH OVERLOOKED AN IMPORTANT DETAIL DURING A TELEPHONE CALL TO THE MAINT DEPT.

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INBOUND CREW OF AIRLINES B727 FLT WROTE THE FOLLOWING DISCREPANCY: AT 350 KTS CLBING; ENCOUNTERED LIGHT TURB; NOSE GEAR DOORS STARTED BANGING AND NOSE GEAR DOOR LIGHT ILLUMINATED. FOLLOWED PLT OPERATING MANUAL PROCS AND CONTINUED AGAIN ON DSCNT AT 310 KTS -- SAME OCCURRENCE -- SEE PREVIOUS WRITE-UP JAN/XX/94. I INSPECTED THE NOSE GEAR DOORS; CABLES; LINKAGES FOR INTEGRITY; ETC. DOOR DROP WAS NORMAL. I CALLED ATL MAINT COORDINATOR AND TOLD HIM THE PROB; BUT UNKNOWINGLY OMITTED THE GEAR DOORS BANGING. AFTER TELLING HIM THAT THIS ACFT HAD 3 PREVIOUS WRITE-UPS FOR THE SAME PROB; I ASSUMED THAT HE WOULD PULL UP THE ACFT HISTORY ON THE COMPUTER. UPON HIS ADVICE AND WITH MY FOREMAN; WE PUT AN MCO (MAINT CARRY OVER) ONBOARD THE ACFT USING MEL (MINIMUM EQUIPMENT LIST) NUMBER REV CL DATED XX; WHICH STATES HE CAN GO; BUT THE MCO IS ON THE LNDG GEAR DOOR WARNING SYS. IT WASN'T UNTIL AFTER THE FLT DEPARTED THAT IT OCCURRED TO ME THAT I HAD UNINTENTIONALLY FORGOTTEN ABOUT THE BANGING GEAR DOORS. OBVIOUSLY I THEN KNEW THE GEAR DOORS WERE OUT OF RIG. LATER; THE MAINT COORDINATOR CALLED AND MENTIONED THAT I HAD NEGLECTED TO TELL HIM ABOUT THE BANGING NOISE. I TOLD HIM THAT I ASSUMED HE WOULD PULL UP THE HISTORY ON THE COMPUTER WHEN I TOLD HIM ABOUT THE PREVIOUS WRITE-UPS. HE TOLD ME HE USUALLY DOES THIS BUT IN THIS CASE HE HAD ANOTHER PROB ALSO. WHAT IT COMES DOWN TO IS MY OMISSION OF RPTING ALL THE FACTS TO HIM AND MY ASSUMPTION THAT HE WOULD LOOK AT THE ACFT HISTORY WHILE I WAS TALKING TO HIM; WHICH I BELIEVE WE BOTH CORRECTED. AFTER THE ACFT DEPARTED; IT TURNED BACK WITH ANOTHER UNRELATED PROB AND THEY HELD THAT ACFT HERE TO CORRECT THE UNRELATED PROB AND NOSE DOOR RIGGING PROB; THUS REMOVING MY MCO (MAINT CARRY OVER).