What was found
DURING CLIMBOUT NR 1 CSD AND NR 3 CSD OVERHEATED (NR 1 REPEAT), NR 1 WAS 130C & NR 3 125C WITH NR 2 105C (IN LIMITS). IAW QRH NR 1 GEN BREAKER WAS TRIPPED AND WAS STILL OVER 120C AFTER 3 MIN. DISCONNECTED NR 1 CSD. NR 3 GEN WAS TRIPPED AND WAS OVER 120C AFTER 3 MIN. DISCONNECTED NR 3 CSD. NR 2 CSD NEVER WENT ABOVE 110C. INSPECTED NR 01 AND 03 CSD OIL LEVEL AND MAGNETIC FILTERS, FOUND OK. REMOVED AND REPLACED NR 01 & 03 -IN- TEMP SENSORS (IPC 24- 10-02-01ZZ). REMOVED AND REPLACED NR 01 CSD OIL COOLER PER MM 24-10-061-4. RECONNECTED BOTH NR 01 AND 03 CSD'S, RAN THE ENGINES TO TAKEOFF POWER DURING 5 MINUTES PER 727 JRH, SYS WORKED PROPERLY IAW MM 24-10-001-0.