Missing engine audio

Cause

Sound pack missing, Wwise conflict, or sim audio settings.

Solution

1. Check Effects/Engine volume in MSFS settings.
2. Reinstall the add-on sound module if shipped separately.
3. Remove duplicate sound mods for the same aircraft.
4. In X-Plane check FMOD/Wwise plugins in Log.txt.

Alternatives

Reset sim audio settings to defaults temporarily.