What was found
DUE TO APU GEN FAULT T/S PER TASK 24-20-00-810-986-A. PERFORM RESISTANCE CHECKS PER THIS TSM TO CONFIRM FAULT PER STEP 4A. IF NO TROUBLE IS FOUND IN THE WIRING CHECKS PLEASE REPLACE APU GEN. ACCOMPLISHED TSM 24-20-00-810-986-A. RESISTANCE CHECK OF APU GEN PMG FAILS RESISTANCE READING PINS 13-14 RESISTANCE IS 28OHMS. OTHERS PINS OKAY WITHIN LIMITS. EXCITER FIELD PINS 9-10 RESISTANCE CHECK 7.6 OHMS. RESISTANCE CHECK BETWEEN GAPCU PINS 9,10,11,12,13 TO APU GEN PINS 14, 13, 12, 9, 10 CHECK OK AND NO SHORTS TO GROUND. NEED TO REPLACE APU GEN. REMOVED AND REPLACED APU GEN PER AMM 24-23-51 UP TO STEP SUBTASK 710-050-A(F)(1). COMPLETED REMAINING STEPS PER AMM 24-23-51-400-801-A. OPS AND LEAK CHECK GOOD. OK FOR SERVICE.