As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMP T/C 78273000, FOUND NR 1 ENGINE WITH LONG TIME FAULT 74-30971, THE APL INPUT VOLTAGE FOR L EXCITER IS OUT OF RANGE. ACFT GROUNDED. PERFORMED FAULT ISOLATION TEST IAW FIM 74-21 TASK 801. NO FAULT FOUND. NO HISTORY. OK FOR SERVICE.