Final answer:
Amber X's on the PFD pitch and bank limits signify that the attitude information is unreliable. Pilots should not use this information for flight and must rely on other procedures or instruments.
Step-by-step explanation:
If the PFD (Primary Flight Display) pitch and bank limits are showing amber X's, this typically indicates that the attitude information displayed on the PFD is considered unreliable or invalid. In aviation, the PFD is crucial for providing the pilot with real-time information about the aircraft's orientation, including its pitch (nose up or down attitude) and bank (wing level or inclined).
If there are amber X's over the attitude presentation, pilots are advised not to rely on this information for flying the aircraft and should refer to standby instruments or other procedures as outlined in the aircraft's emergency or abnormal procedures checklist.
Amber X's on PFD pitch and bank limits provide essential information to pilots, ensuring they are aware of the autopilot status. This visual cue aids in maintaining control and making informed decisions during manual flight operations.