As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, CAPTS INSTRUMENTS YAW DAMPER AND MOST CONTROL AND NAV INST LOSS ELECTRIC POWER. STANDBY POWER DID NOT RESTORE CAPTS INSTRUMENTS. APU WOULD NOT START, F/O INSTRUMENTS WORKED. VOLTS AND FREQS NORMAL BOTH GENERATORS. REPLACED NR 1 TRANSFER CIRCUIT BREAKER AND POWER RELAY. FOUND C/B POPPED, POWER AND APU CHECK NORMAL.