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Aileron and Elevator Control Module Assembly

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Aileron and Elevator Control Module Assembly

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Questions and Answers

Describe the configuration of the EBHAs and EHSAs used for aileron control.

The EBHAs are configured with one R/T and one receive bus interface, while the EHSAs have one R/T and one receive bus interface.

Explain how the FCCs transmit aileron surface position commands to the REUs.

Both FCCs transmit on all their REU buses unless two channels in one FCC are invalid or in a lower capability operational mode to the other FCC. The REUs average the surface position commands from the primary and secondary bus.

Describe the two-step scheme used by the FCCs for mechanical fault detection of the aileron RVDTs.

If all RVDTs are valid, the FCC uses a quadriplex voter to determine the average value of the two middle valued RVDTs. If only three RVDTs are valid, the FCC uses the middle value. If only two RVDTs are valid, the FCC averages the two.

Explain how the autopilot servo actuators operate in the aileron control system.

<p>In autoflight mode, the columns are positioned by two AP servo actuators operating in active/standby. The FCCs receive the AP position commands through the wheel RVDTs.</p> Signup and view all the answers