Indonesia AirAsia QZ8501
Printed page 47. PDF page 49.
these are indicated by a status change the Yaw Damper Fault (YDF) 1 and 2 parameters. At 2315:36 UTC, the fourth Master Caution illuminated associated with both RTLU malfunction and was followed by different indication on FDR parameters. The fifthOpen official document at PDF page 49Aircraft Accident Investigation Report: PT. Indonesia Air Asia, Airbus A320-216, PK-AXC, 28 December 2014