What was found
AIRCRAFT WAS NOT GNDED. AIR INTERRUPT, EMER WAS DECLARED, LANDING UNEVENTFUL & ACFT NOT OVERWEIGHT. DURING CRUISE LT CONSTANT SPEED DRIVE TEMPERATURE INCREASED INTO THE RED DANGER ZONE & WAS DISCONNECTED. CREW WAS UNABLE TO START APU. FLIGHT DIVERTED. R & R LT ENG GEN IAW AMM 24-20-01, CONSTANT SPEED DRIVE & CONSTANT SPEED DRIVE OIL COOLER IAW AMM 24-10-03. OPERATIONAL & LEAK CHECKS NORMAL. SEE ALSO AALA20160602019 & AALA20160606007.