A malfunction of an intermittent nature may be cleared by pressing which switch on the AFCS panel?

• A. FAILURE RESET CPTR 2
• B. FAILURE RESET CPTR 1
• C. INTERMITTENT CLEAR
• D. RESET AFCS

Answer: (A)

When an intermittent fault shows up in the AFCS, the goal is to clear the fault memory without fully interrupting or resetting the entire autopilot system. Resetting the specific processor that logged the intermittent fault is the targeted way to do this, allowing the system to re-enter normal operation if the fault was momentary.

Pressing the Failure Reset CPTR 2 switch clears the fault memory and resets the latches in the CPTR 2 processor. CPTR 2 is the channel most often associated with intermittently latched AFCS faults, so resetting this processor addresses the intermittent condition directly without disturbing the other control processor. This makes it the most appropriate choice for clearing an intermittent malfunction.

Using the other resets either clears or disrupts different parts of the AFCS or the entire system. Resetting CPTR 1 may handle faults there but won’t reliably clear a fault latched in CPTR 2. The intermittent clear option isn’t the standard procedure for this scenario, and a full RESET AFCS would reboot the entire AFCS, which is more disruptive than necessary.

So, the best action is to press the Failure Reset CPTR 2 switch to clear an intermittent AFCS fault.