static void CheckIfAircraftNeedsService(Aircraft *v)
{
	bool needs_automatic_servicing = v->NeedsAutomaticServicing();
	bool has_pending_replace = v->HasPendingReplace();
	if (Company::Get(v->owner)->settings.vehicle.servint_aircraft == 0 || (!needs_automatic_servicing &&
			(!has_pending_replace || v->subtype != AIR_HELICOPTER || !_settings_game.order.serviceathelipad))) return;
	if (v->IsChainInDepot()) {
		VehicleServiceInDepot(v);
		return;
	}

	/* When we're parsing conditional orders and the like
	 * we don't want to consider going to a depot too. */
	if (!v->current_order.IsType(OT_GOTO_DEPOT) && !v->current_order.IsType(OT_GOTO_STATION)) return;

	const Station *st = Station::Get(v->current_order.GetDestination());

	assert(st != NULL);

	/* only goto depot if the target airport has a depot */
	if (st->airport.HasHangar() && CanVehicleUseStation(v, st)) {
		v->current_order.MakeGoToDepot(st->index, ODTFB_SERVICE);
		SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
	} else if (v->current_order.IsType(OT_GOTO_DEPOT)) {
		v->current_order.MakeDummy();
		SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
	} else {
		bool hangar_in_o = false;
		const Order *o;

		/* Is there at least an airport coupled with a hangar in the orders? */
		FOR_VEHICLE_ORDERS(v, o) {
			if (o->IsType(OT_GOTO_STATION)) {
				const Station *ost = Station::Get(o->GetDestination());
				if (ost->airport.HasHangar() ||
						/* Helicopters can be serviced at helipads as long as there is no pending replace and serviceathelipad is enabled */
						(v->subtype == AIR_HELICOPTER && !has_pending_replace && _settings_game.order.serviceathelipad && ost->airport.GetFTA()->num_helipads)) {
					hangar_in_o = true;
					break;
				}
			}
		}

		if (!hangar_in_o) {
			/* there's no airport coupled with a hangar in the orders, so look for a nearby hangar */
			const StationID nearest_hangar = FindNearestHangar(v);

			/* v->tile can't be used here, when aircraft is flying v->tile is set to 0 */
			TileIndex vtile = TileVirtXY(v->x_pos, v->y_pos);

			if (nearest_hangar != INVALID_STATION && (has_pending_replace && v->subtype == AIR_HELICOPTER && _settings_game.order.serviceathelipad && !needs_automatic_servicing ||
					/* is nearest hangar closer than destination? */
					DistanceSquare(vtile, Station::Get(nearest_hangar)->airport.tile) <= DistanceSquare(vtile, st->airport.tile))) {
				/* defer destination, service aircraft at that hangar now */
				v->current_order.MakeGoToDepot(nearest_hangar, ODTFB_SERVICE);
				v->SetDestTile(v->GetOrderStationLocation(nearest_hangar));
				SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
			}
		}
	}
}