What was found
AT THE NEXT OVERNIGHT MX, T/S REPEAT WRITE UPS FOR YDMCI TYPE: TROUBLESHOOTING PRIORITY 1UNCOMMANDED YAW MOTION (FLIGHT 5219 - FILED CLOSED) JAN 22, 2025 STATION: GRB--REMOVED AND REPLACED FCC #2 CARD IAW AMM 22-12-14. OPS CHECK GOOD AT THIS TIME. AC REMAINS CAT II & RVSM STATUS. JAN 24, 2025 STATION: COS -- PERFORMED SERVO-ERROR TEST IN REFERENCE TO AMM 22-22-01. LEFT YAW DAMPER PASSED. RIGHT YAW DAMPER DISCONNECTED DURING TEST. PER MX REQUEST, REPLACED BOTH YAW DAMPERS. SEE CP29526122 AND 29526123 FOR REPLACEMENT OF YAW DAMPERS. PERFORMED CAT II RTS TEST IN REFERENCE TO MIP 34-220-1021-SKY. CAT II RTS TEST PASSED. ***A/C UGRADED TO CAT II AND RVSM STATUS AT THIS TIME***