As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 320 APU GEN OFF, APU FAULT CAME. APU TACH GEN WENT TO 90%. IN THE DECENT THE APU GEN CAME BACK ON LINE. APU TACH GEN WENT BACK TO 100%.T/S IAW MD90 FIM 49-01. FOUND APU FUEL CONTROL UNIT FAULT AND P2 SENSOR WITH INCORRECT VALUES P2 SENSOR REPLACED IAW MD90 AMM 49 -23. FUEL CONTROL UNIT REPLACED IAW MD90 AMM 49-32. APU OPS NML. NO LEAKS NOTED. OK FOR SERVICE. (LP# 5475896)