What was found
TPA - FLIGHT DEPARTED DCA ENROUTE TO TPA WITH MEL 24-01A APPLIED DUE TO THE NR 1 ENGINE CSD LEAKING. DURING FLIGHT, THE APU GENERATOR REPEATEDLY DROPPED THE NR 1 GENERATOR BUS. APU STATS WERE: EGT-380, VOLTS-117, FREQS-408 AND AMPS-30. THE BUS DROPPED OFF LINE EVERY ONE MINUTE BUT WOULD RECONNECT EVERYTIME. FLIGHT LANDED WITHOUT FURTHER INCIDENT AT TPA. MAINTENANCE OPERATED APU ON LINE AND COULD NOT DUPLICATE FAULT. HOLDS NORMAL. REMOVED AND REPLACED THE APU GENERATOR CONTROL PANEL PER MM 24-21-81. CLEARED MEL 24-01A WITH THE REPLACEMENT OF THE NR 1 ENGINE CSD FILTER HOUSING O-RING AND DEFECTIVE HOLD DOWN BOLT IN HOUSING MOUNT. AIRCRAFT OK FOR SERVICE.