Troubleshoot climb guidance

For a climb-guidance report, record the aircraft variant and add-on version, altitude, indicated and selected speed, selected altitude, thrust, configuration, active and armed FMA modes, and autothrottle mode ^[226].

Repeat one change

Repeat the same setup and change only the speed source: compare selected-speed FLCH with the original FMS-managed setup. Record the resulting FMA, speed, pitch and thrust ^[227].

Read the difference

A different response identifies a condition to investigate; it does not by itself identify a defect. Compare the recorded values with the FSS FLCH and VNAV descriptions ^[38].