What was found
APU QUIT AT 22,000 FEET, RUNNING ON ONE GENERATOR TRIED TO RESTART, APU WOULD NOT START. DROPPED TO 20,000 FEET, RESTARTED APU AND IT QUIT AGAIN AT 20,000 FEET. RETURNED TO VHHH. CLEANED AND RESECURED CONNECTIONS AT ECB, APU OPS CHECKS GOOD ON GROUND IAW A300 AMM CHAPTER 49-10-00.