What was found
JUST AFTER LEVEL OFF THE RIGHT BACK-UP GENERATOR FAILED. CREW ATTEMPTED TO START APU AND APU FAILED. CREW ELECTED TO RETURN TO MIA. *S/D* APU FAILED TO LIGHT AT 33,000 FT WITH FAULT LIGHT INDICATION ON 17 JAN, 1999. MIA MAINTENANCE REPORTED APUC LATCHED FAULTS 49-11200 AND 49-11110. THESE FAULTS WERE FINALLY CLEARED PER FIM MM REF 49-53-804. THE SAME DAY MIA ACP TWO NORMAL APU STARTS. APU WAS REMOVED. FOUND AIR TURBINE STARTER CLUTCH BEARING (P/N 3616641-1) FAILED.