As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER APU START, UNABLE TO PUT APU GEN ON THE BUS. GROUNDED - YES. (RESOLVED ON W/O: 1976088 TASKCARD: N/R-00001 ) REMOVED AND REPLACED APU SGU IAW AMM 49-41-21. SGU PART NUMBER VERIFICATION WITH SEAMC PETER ACCOMPLISHED. 2CB PULLED, COLLARED AND RESET. OPS CHECK GOOD. THIS CLEARS MEL 49-11-01. PLACARDS REMOVED. REF L/P 60906860 FOR PLT FOR SGU FILTER CHANGE AND REF L/P 60906852 FOR REQ CSS MEL 49-99A. SEAMC SCOTT NOTIFIED.