As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER APROXIMATELY 5 MINUTES WITH BATTERY POWER APPLIED, "YAW SAS" MESSAGE FAILS TO APPEAR AFTER SAS/AP CUT WITH AP ENGAGED. "YAW SAS" MESSAGE APPEARS AFTER A DELAY; THEN FAILS TO APPEAR ALTOGETHER. REMOVED AND REPLACED YAW SEMA IAW AMM 67-34-00, 4-1 67-20-00, 4-14.