This ruling was discussed before on the Official Asia Forum, and the conclusion was that the Machina Union monsters will follow the ruling of Heavy Mech Support Platform.
- Quote :
- Q:「装備モンスター」と「装備カード状態のこのカード」が《最終戦争》や《ブラック・ローズ・ドラゴン》等で同時破壊される場合、どうなりますか?
A:装備モンスターは、フィールド上に残ります。(10/12/11)
Source: 《強化支援メカ・ヘビーウェポン》 -遊戯王カードWiki
Q: When "Equipped Monster" and "This card in Equipment Card mode" are destroyed together by "Final Destiny" or "Black Rose Dragon", what will happen?
A: The equipped monster will remain on the field. (11th December 2010)
Digressing a bit, here's the confusing part:
- Quote :
- Q:装備モンスターと装備カード状態のこのカードが《ゴッドバードアタック》や《剣闘獣ガイザレス》等で同時に破壊される対象に選択された場合、装備モンスターはフィールド上に残りますか?
A:調整中。(10/12/11)
Source: 《強化支援メカ・ヘビーウェポン》 -遊戯王カードWiki
Q: When "Equipped Monster" and "This card in Equipment Card mode" are targeted to be destroyed by "Gladiator Beast Gyzarus" or "Icarus Attack", what will happen?
A: Under adjudication (11th December 2010)
Just for some background knowledge, the prior ruling was that only the Union monster in Equipment Card mode will be destroyed, similar ruling as the interaction with Black Rose Dragon.