def METHOD_NAME(self, internal_id):
    """Returns the operational status for a fan with the given internal id."""
    oper_status = yield self.retrieve_column_by_index(
        "cefcFanTrayOperStatus", (int(internal_id),)
    )
    self._logger.debug("cefcFanTrayOperStatus.%s = %r", internal_id, oper_status)
    defer.returnValue(self._translate_fan_status(oper_status))