As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING CDU FAULT INTERROGATION ON THE NR 1 ENGINE, FOUND MESSAGES 73-10791 AND 73-10791, PS3 SIGNALS DISAGREE SHORT TIME FAULT. ACFT GROUNDED. THIS FAULT DID NOT SHOW UP AGAIN. SHORT TIME CODE 73-10791 IS CLEARED IAW TASK CARD 78273000.