What was found
ALTITUDE SELECTOR MODE WHEN ENGAGED, WILL START TO PORPOISE IN BOTH A & B MODE. REMOVED AND REPLACED AUTOPILOT CONTROL PANEL AND PERFORMED OPS CHECK IAW B727 MM 22-11-181. OPS CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ALTITUDE SELECTOR MODE WHEN ENGAGED, WILL START TO PORPOISE IN BOTH A & B MODE. REMOVED AND REPLACED AUTOPILOT CONTROL PANEL AND PERFORMED OPS CHECK IAW B727 MM 22-11-181. OPS CHECK GOOD.