--- a/aircraft_cmd.c	Mon May 01 09:58:43 2006 +0000
+++ b/aircraft_cmd.c	Mon May 01 11:27:39 2006 +0000
@@ -772,8 +772,7 @@
 	}
 
 	// get airport moving data
-	assert(v->u.air.pos < GetAirport(st->airport_type)->nofelements);
-	amd = &_airport_moving_datas[st->airport_type][v->u.air.pos];
+	amd = GetAirportMovingData(st->airport_type, v->u.air.pos);
 
 	// Helicopter raise
 	if (amd->flag & AMED_HELI_RAISE) {