DC10 FLC EXPERIENCED VIBRATION AFTER TKOF. EMER DECLARED. FUEL DUMPED. COORD WITH DISPATCH AND MAINT LED TO FLC DECISION TO RETURN LAND.

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AFTER TKOF A MODERATE VIBRATION WAS NOTED. THIS VIBRATION INCREASED WITH INCREASING SPD. FLAPS WERE RETRACTED. NO IMPROVEMENT. FLAPS WERE LOWERED AGAIN TO REDUCE VIBRATION. NO SURFACE POS INDICATOR; OR DOOR WARNING LIGHT WAS ABNORMAL. AFTER CONSULTING WITH MAINT AND DISPATCH; A DECISION WAS MADE TO DUMP FUEL TO LNDG WT AND RETURN TO DTW. WE WERE VECTORED OVER LAKE ERIE; AND COORDINATED WITH ATC FOR A FUEL DUMP AT 8000 FT MSL. DURING FUEL DUMP THE AUTO FUEL DUMP SHUTOFF FEATURE APPEARED TO ACTIVATE AT 90000 LBS TOTAL FUEL REMAINING RATHER THAN THE EXPECTED 34500 LBS (LOWEST MAIN TANK READING AT THIS TIME WAS 19800 LBS). THIS EARLY SHUTOFF WAS ACCOMPANIED BY NUMEROUS; INTERMITTENT; RECURRING FUEL BOOST PUMP FAILURES (#2 TANK TRANSFER PUMP; BOTH AUX TANK PUMPS; #3 TRANSFER PUMP). FUEL DUMP WAS CONTINUED; HOWEVER; TO A NORMAL LNDG WT AND AN UNEVENTFUL LNDG WAS MADE. FIRE AND CRASH PERSONNEL INSPECTED THE ACFT AND COULD FIND NO ABNORMALITIES. MAINT LATER DISCOVERED A BROKEN ACTUATOR TO A CTR GEAR DOOR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: AS A CONSERVATIVE MEASURE; AN EMER WAS DECLARED. FLT ATTENDANTS AND PAX WERE BRIEFED ON ACFT STATUS AND FUEL DUMPING PROCESS. BEFORE RETURNING TO LAND; THE DC10 WAS VECTORED BY ATC OVER LAKE ERIE AT 6000 FT FOR FUEL DUMPING. APPROX TIME LAPSE FROM INITIAL VIBRATION TO RETURN LNDG WAS AROUND 50 MIN. THE CAPT (RPTR) STATES THAT DURING THE DUMPING PROCESS THE FLC GOT AN INDICATION THAT SOMETHING WAS HOT; SMELLING ELECTRICAL. AT THIS TIME THEY EXPERIENCED THE BOOST PUMP FAILURES; SO AFTER MULTIPLE RESETS OF THE PUMP CIRCUIT BREAKERS; RPTR ELECTED TO DISCONTINUE DUMPING AND LAND OVERWT. THIS DC10 HAS NO COCKPIT INDICATION FOR GEAR DOOR MALFUNCTION. AS FAR AS THE RPTR KNOWS; THERE WAS NO MAINT RESOLUTION FOR MALFUNCTIONING PUMPS OR ELECTRICAL SMELL.