As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL - FLT NR 0117 - CLIMBING OUT FROM LGA EN ROUTE TO MCO WITH ALT ALERTING AND 'A' CHANNEL AUTOPILOT ON MEL, AIRCRAFT WOULD NOT HOLD ALTITUDE OR RESPOND TO CHANGES WITHOUT USING ALT SEL. MAINTENANCE REPLACED THE AUTOPILOT MODE CONTROL PANEL. BITE CHECKED AND FUNCTIONAL CHECKED GOOD. (M)